Battery Chargers

Thermostat Model ISQB is the best suited thermal cutout for over temperature protection of battery chargers.

Thermostat for Battery Charger – Model ISQB

Description of Thermostat/Thermal Overload Protector

Model ISQB thermostat has been developed by our engineering team after extensive R&D for over temperature protection of Battery Chargers. This thermal overload protector has an outer body machined from solid aluminum rod. This provides the thermostat with better heat sensing capability and greater strength. Unlike other thermal cutouts, this aluminum body is electrically insulated, so there is no chance of an electrical shock. This thermal overload protector can be easily mounted with two screws as it has grooves on both ends. Unlike normal snap action disc thermostats, which have delayed restart and in which the trip temperature drifts downwards, our thermal overload protector operate on the over center mechanism with a snap action bimetal and a copper alloy switching blade. This provides the thermostat with quick restart characteristic and stable trip temperature, even after continuous usage. The contacts are made of solid silver for long life. The lead wires are teflon insulated and can withstand high temperature. The body is sealed and resistant to dust, fumes, varnish, moisture, etc. This thermal cutout can is available with both Normally Open (N.O.) or Normally Closed (N.C.) contacts.

Special Features:

    • Aluminum body for strength
    • Better heating sensing capability
    • Solid Silver contacts for long life 1,00,000 operations
    • Easily mountable with two screws
    • Snap action bimetal thermostat
    • Quick make & break switching, no chattering
    • Available in Normally Open (N.O.) or Normally Closed (N.C.) contacts
    • Available in any temperature from 50C to 160C

Application of Thermostat/Thermal Overload Protector

This thermostat can be screwed to any heat sink in the battery charger or on to the body of the charging transformer. When the battery chargers heats up, this thermostat will sense the temperature rise and the bimetal will snap open the contacts at the preset trip temperature. This will disconnect the battery charger from the mains and prevent it from overheating. The trip temperature of the thermal cutout is preset at the time of manufacturing and cannot be changed.

The Normally Open (NO) contacts thermostat can be used to operate a fan when the battery charger overheats. When the equipment heats to the desired trip temperature, the contacts of the thermal overload protector will snap close and this can switch on the fan to cool the battery charger. This can also be used to provide a signal of overheating by operating a control circuit or signal lamp. Please consult us for complete technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) or Normally Open (N.O.) contacts which open or close with a snap action at a  preset temperature and disconnect the battery charger from the mains.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode Thermostat/thermal overload protector will automatically restart upon cooling and will automatically switch on the battery charger and restore the power supply.
 Fitting or Mounting The thermostat/thermal overload protector can be screwed on to the body of the battery charger where it can sense temperature rise, or, it can be screwed on to any heat sink.
 Connections Thermostat/Thermal Overload Protector can be connected in series with the main circuit of the battery charger so that it disconnects the power supply when it trips off. It can also be connected to a control circuit, relay, contactor, etc., which can provide an indication of overheating. It can also be connected to a fan which will operate when the battery charger overheats.

Battery Packs

Developed in our manufacturing facility in India, Model BPM thermostat is the best suited for battery pack over temperature protection.

Thermostat for Battery Packs – Model BPM

Description of Thermal Overload Protector

Model BPM has been developed after extensive research and development by our engineers for battery pack protection from over temperature and burnout. This thermal overload protector is the smallest thermostat in our complete range of thermal cutouts. This thermostat has sloping edges such that it can be fitted between two batteries. The lead wires termination in a nickel strip which is easily spot welded to the body of the battery cell. The outer body of this thermostat is made of engineering polymer which can withstand high temperature. All the internals are spot welded on a stainless steel plate and the contacts are made of solid silver. The body is sealed and resistant to dust, fumes, varnish, moisture, etc.

Unlike normal snap action disc thermostats, which have delayed restart and the trip temperature drifts after long usage, the operating principle of our thermostat is based on the over center mechanism with a snap action bimetal and a beryllium copper switching blade. This mechanism provides our thermal cutout with quick restart and stable trip temperature, even after continuous usage. This thermal cutout is available in Normally Closed (NC) or Normally Open (NO) contacts. The normally open contacts can be used to activate a fan or provide a signal or indication to a control circuit that the batteries are overheating.

Special Features:

    • Small Size fits easily between battery cells
    • Teflon lead wires joined to nickel strips for spot welding to battery body
    • Available in Normally Closed (NC) or Normally Open (NO) contacts
    • Solid silver contacts for long life of 1,00,000 operations
    • Snap action bimetal thermostat
    • No chattering or sparking, quick make and break switching
    • Available in any temperature from 50C to 160C
    • Application of Thermal Overload Protector

Thermostat fitted between Batteries

Model BPM thermal cutout has to be fitted between the batteries (as shown in picture) such that it can sense the heat buildup. The thermostat can be taped on to the battery pack with a high temperature resistant tape. As the batteries heat up, this thermal cut out will sense the heat rise and will trip off at the desired temperature, which is preset at the time of manufacturing and cannot be changed. The trip off temperature is provided by the customer and the thermal cutout is calibrated so that it always trips off at that temperature. For battery pack protection, this cut off is normally at 65C. Please consult us for complete technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Switching Action SPST Normally Closed (N.C.) contacts which open with a snap action at a  preset temperature and disconnect the battery pack from supplying power to the equipment.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling, which will reconnect the battery pack with the equipment. Adequate precaution must be exercised in heat sink protection applications where automatic thermostat/thermal overload protector restart can cause injury.
 Fitting or Mounting The thermostat/thermal overload protector can be placed in between two batteries or can be taped on to the batteries with a high temperature tape.
 Connections Thermostat/Thermal Overload Protector should be connected in series with the battery so that the battery is disconnected when the thermostat trips off and restarts when the thermostat cools.

CO2 Welding Gas Pre-heater

We are the leading manufacturers and suppliers of thermostats for gas pre-heaters and have been supplying thermostats to this industry for the last 25 years. Almost all manufacturers of various gas pre-heaters (especially Advani-Oerlikon type design) use our thermostat model ISQA due to its durability, strength and stable trip temperature over a long period of continuous usage.

Gas Pre-heater Thermostat – Model ISQA

Description of Thermostat/Thermal Overload Protector

Model ISQA thermal overload protector acts as a thermostat and heats the cold welding gas to the desired temperature. This thermostat model has a solid aluminum body for greater strength and better heat sensing capability. This thermostat has two holes by which it can be easily mounted on to the body of the gas pre-heater. The aluminum body is electrically insulated. So there is no chance of any electrical shock. The internal contacts of the thermostat are made of sold silver for long life. The internal mechanism is all spot welded on a stainless steel housing plate. The lead wires are Teflon insulated and can withstand high temperature. The body of the thermostat is double sealed with high temperature epoxy, so the operating characteristics is not affected by dust, moisture, varnish, etc.

Normal snap action disc thermostats have delayed restart and the trip temperature drifts downwards after long usage. Our thermostats have a snap action bimetal and a beryllium copper switching blade which operate on the over center mechanism. This provides the thermostat with quick restart characteristic and stable trip temperature, even after long usage of many years.

Special Features:

  • Solid Aluminum body of strength
  • Better heat sensing capability
  • Solid silver contacts for long life of 1,00,000 operations
  • Snap action bimetal thermostat
  • Teflon insulated lead wires
  • Available in any temperature from 50C to 160C

Application of Thermostat

This thermostat has to be mounted inside the gas pre-heater with two screws. It should be fitted close to the heating element so that it can sense the temperature rise quickly. This thermostat maintains the temperature of the welding gas in the desired temperature range. When the temperature of the heater rises, the thermostat senses this rise and trips off, thereby, switching off the heater and preventing overheating. Subsequently, when the heater cools down, the thermostat switches on and restarts the heater. After which it again switches off/on and maintains the desired temperature range. This temperature range is fixed at the time of manufacturing and cannot be changed. It is specified by the customer. Normally most customers are using 120C thermostat model ISQA. Please consult us for complete technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Closed (N.C.)
 Switching Action SPST Normally Closed (N.C.) contacts which open or close with a snap action at a  preset temperature and disconnect the gas preheater from the mains.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling and this will automatically switch on the gas preheater.
 Fitting or Mounting The thermostat/thermal overload protector can be screwed on to the body of the gas preheater or near the heating element so that it can sense the temperature rise.
 Connections Thermostat/Thermal Overload Protector can be connected in series with the heater.

Coils & Solenoids

From our complete range of thermostats, Model BPM thermal overload protector is the best suited thermostat for over temperature and burnout protection of Coils and Solenoids.

Thermostat for Coils & Solenoids – Model BPM

Description of Thermostat/Thermal Overload Protector

Model BPM thermostat is manufactured in our manufacturing facility in India. This thermal overload protector has been developed after extensive research and development by our engineers as the smallest thermostat in our entire range of thermostats. Due to the small size of the thermostat, it can be easily taped or fixed on to coils and solenoids where space is a constraint. This thermostat has an outer body which is made of an engineering polymer which can withstand high temperature. The internal contacts are made of solid silver. This ensures that the thermostat has a long life. All the internal components are spot welded on a stainless steel housing plate. The body of the thermostat is sealed so that the operating characteristics are not affected by dust, moisture, etc. Due to the sophisticated engineering and research, this model is available with Normally Open (NO) or Normally Closed (NC) contacts.

The operating principle of our thermostats is based on the over center mechanism which operates a snap action bimetal and a beryllium copper switching blade. Due to this there is quick restart and stable trip temperature. In the normal snap action disc thermostats, the trip temperature drifts downwards after continuous usage and there is delayed restart.

Special Features:

  • Smallest size for easy fitting
  • Bimetallic Snap Action Thermostat
  • Available in Normally Open (NO) or Normally Closed (NC) contacts
  • Accurate an Precise Operation
  • Chattering free and no sparking
  • Quick make and break switching action
  • Solid silver contacts for long life of 1,00,000 operations
  • Available in any temperature from 50C to 160C

Application of Thermostat/Thermal Overload Protector

The function of Model BPM thermostat is to prevent overheating. So it needs to be fixed or taped onto the coil or solenoid such that when the heat builds up, it can sense the rapid temperature rise and trip off. This thermal overload protector needs to be connected in series with the coil or solenoid. For switching high ampere loads in the coil or solenoid, the thermostat needs to be connected to a relay, contactor or control circuit. When the temperature rises to the cut-off point, the thermostat will trip off, thereby, disconnecting the coil and solenoid from the mains, or it can provide a signal to the relay or control circuit to disconnect the mains. Please consult us for complete technical advice.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) or Normally Open (N.O.) contacts which open or close with a snap action at a  preset temperature and disconnect the coil or solenoid from the power supply.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling. This will automatically switch on the coil or solenoid and restore current flow.
 Fitting or Mounting The thermostat/thermal overload protector can be taped on the coil or solenoid with a high temperature resistant tape.
 Connections Thermostat/Thermal Overload Protector can be connected in series with the main power supply of the coil or solenoid. For heavy loads use a relay or contactor.

Electronics Equipment

Thermal Overload Protector Model ISQB is best suited for over temperature and burnout protection of electronics equipment.

Electronics Protection Thermostat – Model ISQB

Description of Thermal Overload Protector

We are the leading manufacturer and supplier of thermal overload protectors and thermostats in India. Due to the high demand from the electrical and electronics industry in India, we have developed a thermostat model ISQB for over temperature and burnout protection of electronics equipment especially for this industry. Using this thermostat can eliminate the use of thermistor protection circuits for over temperature and burnout.

Model ISQB thermal overload protector which can be screwed on to any aluminum heat sink channel or on to body of any electronics equipment. It has a small size and has a solid machined aluminum outer body. Unlike other thermostats, the aluminum body of model ISQB is electrically insulated, so there is no chance of electrical shock. The operating mechanism is based on a snap action bimetal strip and a copper alloy switching blade which works on the over center tripping mechanism. This mechanism ensures that the thermostat has quick restart characteristics as well as stable trip temperature, even after long usage. The other snap action disc thermostats have delayed restart and the trip temperature drifts downwards after long usage.

When the temperature rises, the bimetal strip senses the heat and trips off, thereby, saving the electronics equipment from burning out. This thermostat is available with Normally Open (NO) or Normally Closed (NC) contacts. It has solid silver contacts for long life and teflon lead wires, which can withstand high temperature. The body is double sealed, so the operating characteristics are not affected by dust, moisture, varnish, etc.

Special Features of Thermal Overload Protector:

  • Save Costs by eliminating thermistor protection circuits
  • Solid Aluminum body for strength
  • Easily mountable with two M3 screws
  • Available with Normally Open (NO) or Normally Closed (NC) contacts
  • Very sensitive to temperature rise
  • Snap Action bimetal thermostat
  • Quick make and break action, no sparking or chattering
  • Solid silver contacts for long life of 1,00,000 operations
  • Available in any temperature from 50C to 160C

Application for Electronics Protection

Model ISQB is suitable for over temperature and burnout protection of all electronics equipment such as invertors, UPS, amplifiers, SMPS power supply, AC & DC power supplies, etc, and eliminates the use of costly thermistor protection circuits. This thermal overload protector can be screwed on to the heat sink or the body of the equipment with two M3 screws. Since it is available in both Normally Open (NO) or Normally Closed (NC) configuration, it can be connected in series with the main line or it can be connected to a relay or control circuit. When heat builds up, it senses the temperature rise and switches off at a set pre-determined temperature, for example, 75 degrees C. The Normally Open (NO) configuration can be used to switch on a fan when the temperature rises or it can be used to activate a control circuit, which can provide an indication that the equipment is overheating. The pre-determined temperature is set factory preset and cannot be changed by the user. Please consult us for complete technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) or Normally Open (N.O.) contacts which open or close with a snap action at a  preset temperature and disconnect the electronic equipment from the mains.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling. This will automatically switch on the electronic equipment. Adequate precaution must be exercised in power electronics protection applications where automatic thermostat/thermal overload protector restart  can cause injury.
 Fitting or Mounting The thermostat/thermal overload protector can be screwed on to any heat sink or on to the body of the equipment.
 Connections Thermostat/Thermal Overload Protector can be connected in series with the main circuit or it can be connected to a control circuit, relay, contactor, etc., which can provide an indication of overheating. The Normally Open (N.O.) contact model can be connected to a fan which will operate when the equipment overheats and the contacts close.

Heat Sink Protection

For over temperature and burnout protection of Heat Sinks, the Thermal Overload Protector Model BPM is best suited.

Heat Sink Thermostat – Model BPM

Description of Thermal Overload Protector

To cater to the requirements of the electronics industry in India, our engineers have especially developed the Model BPM thermal cut-out for heat sink over-temperature protection. With our focus on quality and the extensive R&D and manufacturing facility in India, our engineers have developed the thermal cut-out Model BPM.

This marvel of precision engineering and miniaturization is the smallest thermal overload protector in our entire range of products. This thermostat has been specifically designed for over temperature protection of electronic equipment by sensing temperature rise of heat sinks. Since this thermal cutout has a thickness of only 3.3mm, it can be placed between the fins of a heat sink. Any adhesive such as silicone glue, epoxy, etc. can be applied over the thermal cutout so that it is permanently fixed in place. Our snap action bimetal thermostat operates on the over center mechanism, which gives it a quick restart characteristic and stable trip temperature, even after continuous usage. The normal snap action disc thermostats have a delayed restart and the trip temperature drifts downwards after continuous usage.

Due to small size, the response to heat rise is fast, and when the equipment overheats, the thermal cut-out trips off, thereby, ensuring complete protection to all electronic equipment against over heating. It is available with Normally Closed (NC) or Normally Open (NO) contacts. The internal mechanism is fully spot welded on a steel housing plate. Due to sophisticated materials used and intelligent design, the size has been reduced without affecting the operating characteristics of the thermal overload protector. The outer body is made of high temperature resistant engineering polymer. Lead wires are teflon insulated. The internal tripping contacts are solid silver alloy for long life. The body is sealed and resistant to moisture, gases, fumes and varnish. It is available for any trip temperature required from 50 degrees C to 160 degrees C.

Thermostat inside Heat Sink

Special Features of Thermal Overload Protector:

  • Small size for easy fitting.
  • Snap Action bimetal thermostat, precise operating temperature
  • Quick make and break switching, no Sparking or contact chattering
  • Solid silver contacts for long life of 1,00,000 operations
  • Sealed body resistant to moisture, gases, fumes and varnish
  • Lead wires are teflon insulated.
  • Available with Normally Closed (NC) or Normally Open (NO) contacts
  • Available for any trip temperature required from 50 degrees C to 160 degrees C

Heat Sink with Thermostat in a Circuit

Application

Use of Model BPM is recommended in applications where temperature of heat sinks need to be sensed for over heating and burnout protection. The thermal cut-out is connected in series with the main circuit or a control circuit. In case of over heating, the temperature of the heat sink will rise and the thermostat will sense this and trip off, thereby, switching off the main circuit and saving the equipment from burning out. This model is also available with Normally Open (NO) contacts, so that it can also be used to provide an indication or signal of over heat by connecting it to a fan or a control circuit, which is activated when the contacts close. The trip off temperature is specified by the customer and supplied factory preset. It cannot be changed or adjusted afterwards. Please consult us for complete technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) or Normally Open (N.O.) contacts which open or close with a snap action at a  preset temperature.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling. This will automatically restore the power supply and switch on the electronic equipment. Adequate precaution must be exercised in heat sink protection applications where automatic thermostat/thermal overload protector restart can cause injury.
 Fitting or Mounting The thermostat/thermal overload protector is placed in between the fins of a heat sink. It can be fixed in place by applying any adhesive such as silicone glue, high temperature epoxy, etc.
 Connections Thermostat/Thermal Overload Protector can be connected in series with the main circuit or it can be connected to a control circuit, relay, contactor, etc., which can provide an indication of overheating. The model with Normally Open contacts can be connected to a fan which will operate it when the equipment overheats and the contacts close.

Heaters & Moulds

Thermal Overload Protector Model ISQB is the best suited thermostat for over temperature and burnout protection of Heater Moulds.

Heater Thermostat – Model ISQB

Description of Thermostat/Thermal Overload Protector

Our research and engineering team has developed Model ISQB Thermostat for over temperature protection of heater moulds. This thermal overload protector has a body made of solid machined aluminum, which provides the thermal overload protector with greater strength and better heat sensing capacity. This thermostat can be mounted on to the heater mould with two screws. This thermal overload protector contains a snap action bimetal strip and a beryllium copper switching blade which work on the principle of the over center mechanism. The normal snap action disc thermostats have delayed restart and the trip temperature drifts downwards, but due to the over center mechanism, our thermostats have quick restart characteristic and the trip temperature remains stable, even after long usage. The contacts are made of solid silver which give it a long life. All the internal components are spot welded and the lead wires are Teflon insulated which can withstand high temperature. The body of the thermostat is double sealed with high temperature resistant epoxy adhesive, so it is not affected by varnish, fumes, dust, etc. This thermal overload protector is available in Normally Open (N.O.) or Normally Closed (N.C.) contacts.

Special Features:

  • Solid Machined Aluminum Body
  • Better heat sensing capability and greater strength
  • Easily mountable with two screws
  • Solid silver contacts for long life of 1,00,000 operations
  • Available in Normally Open (N.O.) or Normally Closed (N.C.) contacts
  • Snap action bimetal thermostat
  • Double sealed body with Teflon insulated lead wires
  • Available in any temperature from 50C to 160C

Application of Thermostat/Thermal Overload Protector

Thermostat Model ISQB functions as a heater mould over heat protection device, in case, the main temperature controller fails. It has two grooves, one on each side, so that it can be screwed on to the heater mould with two M3 screws. This thermal overload protector needs to be screwed on to a flat surface near the heater so that it can sense the temperature. The thermostat is connected in series with the heater for low amperes (up to 500W heaters). For heavy loads, use a contactor or relay. If there are multiple heaters, then one thermostat needs to be connected with each heater. When the heat builds up, the thermostat will sense the temperature rise and trip off, thereby, disconnecting the heater from the mains. This trip temperature is not adjustable and is calibrated at the time of manufacturing. It is specified by the customer and it can be different for different types of heater moulds. Please consult us complete technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) contacts which open or close with a snap action at a  preset temperature and disconnect the heater supply to the mould from the mains.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling and will automatically restore power supply to the heater. Adequate precaution must be exercised in heater mould protection applications where automatic thermostat/thermal overload protector restart can cause injury due to overheating.
 Fitting or Mounting The thermostat/thermal overload protector can be screwed with two M3 screws on to any flat surface of the mould so that it can sense the temperature rise.
 Connections Thermostat/Thermal Overload Protector can be connected in series with the heater. For multiple heaters, one thermostat has to be connected to each heater. For heavy loads, use a contactor or relay.

Heating Pads & Electric Blankets

Thermostat model BPM, being the smallest and most temperature sensitive thermal overload protector in our range of products is best suited for over-temperature protection of electric blankets and heating pads.

Thermostat for Electric Blankets & Heating Pads – Model BPM

Description of Thermostat/Thermal Overload Protector

We are the leading manufacturer of thermostats and thermal overload protectors in India. Model BPM thermal cutout has been developed for over temperature and burnout protection of Heating Pads and Electric Blankets. This thermostat is the smallest thermal overload protector in our complete range of thermostats. Due to the small size it fits very easily in electric blankets and heating pads. The outer body is made of a high temperature resistant engineering polymer. The contacts are made of solid silver. All the internal components are spot welded on a stainless steel plate. The body is sealed, so the operating characteristics of the thermostat are not affected by moisture, dust, varnish, etc. The lead wires are teflon insulated and can withstand high heat.

Unlike normal snap action disc thermostats, which have delayed restart and in which the trip temperature drifts downwards after a few months of usage, our thermal overload protectors have a straight bimetal strip which actuates a separate beryllium-copper switching blade based on the over center mechanism. This ensures stable trip temperature over a long period of usage and quick restart of the thermal cutout.

Special Features:

  • Smallest size for easy fitting
  • Solid silver contacts for long life of 1,00,000 operations
  • Quick make and break switching, no chattering
  • Snap action bimetal thermostat
  • Accurate and precise snap action operation, no sparking
  • Available with Normally Open (N.O) or Normally Closed (N.C.) contacts
  • Available in any temperature from 50C to 160C

Application of Thermostat/Thermal Overload Protector

Thermostat model BPM has to be fitted close to the heating element of the electric blanket or heating pad such that it can sense the temperature rise. As the heat builds up, this thermal overload protector will sense the rise in temperature and when the temperature reaches the preset trip temperature, the thermal cutout will trip off, thereby, disconnecting the electric blanket or heating pad from the mains and saving it from burning out. The trip temperature of the thermal cutout is preset at the time of manufacturing and cannot be changed. This trip temperature is specified by the customer, but generally for heating pads and electric blankets, it can be anywhere between 70C or 100C, depending upon product design and specification. Contact us for complete technical advice.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) contacts which open or close with a snap action at a  preset temperature and disconnect the electric blanket or heating pad from the power supply.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling. This will automatically reconnect the power supply and switch on the electric blanket or heating pad.
 Fitting or Mounting The thermostat/thermal overload protector is fitted or taped near the heating element so that it senses the temperature rise.
 Connections Thermostat/Thermal Overload Protector is connected in series with the heating element.

Home Appliances

Model BPM thermostat is the best suited thermal overload protector from our complete range of thermostats for Over Temperature Protection of Home Appliances such as Wax Baths, Electric Lunch Boxes, Oil Heaters, etc.

Thermostat for Home Appliances – Model BPM

Description of Thermostat/Thermal Overload Protector

We have been supplying Model BPM thermostat to home appliance manufacturers for the past 20 years. Our Model BPM thermostat has been the most successful thermal overload protector for over temperature protection of home appliances. This thermal overload protector has the smallest physical size in our complete range of thermostats. Due to the small size it can be easily fitted inside any home appliance. The outer body of this thermostat consists of a high temperature resistant engineering polymer. Unlike normal snap action disc thermostats, which have delayed restart and the trip temperature drifts downwards, our thermostats are based on the over center mechanism. This operates a snap action bimetal strip and a beryllium copper switching blade. As a result, the thermostat has quick restart, stable trip temperature and quick make and break switching with accurate operation and no chattering or sparking. The contacts are made of solid silver for long life. All the internal parts are spot welded on a stainless housing plate. The lead wires are Teflon insulated which can with stand high temperature. This thermostat is available with Normally Open (NO) and Normally Closed (NC) contacts.

Special Features:

  • Small size for easy fitting
  • Solid silver contacts for long life of 1,00,000 operations
  • Bimetallic snap action thermostat
  • No sparking and chattering free
  • Quick make and break switching
  • Available in Normally Open (NO) or Normally Closed (NC) contacts
  • Teflon insulated lead wires
  • Available in any temperature from 50C to 160C

Application of Thermostat/Thermal Overload Protector

Thermostat Model BPM needs to be fitted close to the heat source so that it can sense temperature rise. It can be located near the heater section of the appliance and can be mounted with a clamp. The heater needs to be connected in series with the thermostat. When the heat builds up, this thermal overload protector will sense the temperature rise and will trip off at the preset temperature. This will disconnect the heater from the mains and will save the appliance from overheating. This preset temperature is specified by the customer and is set at the time of manufacturing. It cannot be changed or adjusted. Please consult us for complete technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) or Normally Open (N.O.) contacts which open or close with a snap action at a  preset temperature and disconnect the appliance from the mains.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling. This will automatically restore power supply and switch on the home appliance. Adequate precaution must be exercised in home appliance protection applications where automatic thermostat/thermal overload protector restart can cause injury due to restored power supply.
 Fitting or Mounting The thermostat/thermal overload protector can be fitted with a clamp near the heater or can be taped on to the heater with a high temperature tape so that it can sense the temperature rise.
 Connections Thermostat/Thermal Overload Protector can be connected in series with the main circuit of the appliance.

Liquid Sensing & Oil Transformer

Our Thermostat Model ITD is the best suited thermal overload protector for sensing temperature of liquids and for over temperature and burnout protection of Oil Transformers.

Thermostat for sensing temperature of Liquids – Model ITD

Description of Thermostat

Model ITD has been designed by our engineers after extensive R&D for sensing the temperature rise of liquids as well as for over temperature protection of Oil Transformers. It has a solid machined brass body with a 1/4″ BSP threading so that it can be screwed on to any liquid tank or oil tank. The brass body provides greater strength as well as better heat sensing capability. The operating principle is based on the over center mechanism which operates a snap action bimetal and a beryllium copper switching blade. The normal snap action disc thermostats have a delayed restart and the trip temperature drifts downwards, while in our thermostats, due to the over center mechanism, the restart is quick and the trip temperature remains stable, even after continuous usage. The bimetal strip inside senses the temperature rise and snap opens the contacts. The contacts are made of solid silver for long life. All the internal components are spot welded on a stainless steel housing. The brass body is electrically insulated, so there is no chance of any electrical shock. The body is double sealed, so it is not affected by dust, moisture, etc. This thermal overload protector is available in Normally Open (N.O.) or Normally Closed (N.C.) contacts.

Special Features:

  • Solid brass body for strength
  • Better heat sensing capability
  • Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
  • 1/4″ BSP threading for easy mounting
  • Solid silver contacts for long life of 1,00,000 operations
  • Snap action bimetal thermostat
  • Teflon insulated lead wires
  • Available in any temperature from 50C to 160C

Application of Thermal Overload Protector

Model ITD needs to be screwed in to the liquid filled tank or oil tank so that it can sense the temperature of the liquid or oil. This thermostat should be screwed in where the liquid becomes hot as this will enable it to accurately sense the temperature rise. When the liquid heats up, it will sense the temperature rise and the contacts will snap open, which will trip off the thermostat, thereby, disconnecting the equipment or transformer and saving it from burning out.

If the equipment has a low ampere load of up to 6 to 8 amps, the thermostat can be connected directly in series with the equipment. When it trips off, it will also switch off the equipment. Upon cooling, the thermostat will restart and will restore supply to the equipment.

In the case of oil filled transformers, the two Teflon lead wires should be connected to a relay or a contactor because the thermostat cannot be connected directly in series with an oil filled transformer as it cannot withstand the high ampere load. The relay or contactor can be used to provide an indication, such as a light or alarm, or switch on a cooling circuit or operate a control circuit when the liquid or oil overheats. Please consult us for proper technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) or Normally Open (N.O.) contacts which open or close with a snap action at a  preset temperature and will disconnect the power supply to the Liquid Monitoring Equipment or the Oil Transformer.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode The thermostat/thermal overload protector will automatically restart upon cooling will restore power supply to the Liquid Monitoring Equipment or the Oil Transformer.
 Fitting or Mounting The outer body of the thermostat/thermal overload protector has 1/4″ BSP threads so that it can be screwed in to a liquid or oil tank.
 Connections For low amps application, the thermostat/thermal overload protector can be connected in series with the heat source. For higher amps. application it needs be connected to a control circuit, relay, contactor, etc., which can provide an indication of overheating and thereafter, switch off the equipment when the thermostat trips off.

Model BPM – Thermal Overload Protector

Thermal Overload Protector

Thermal Overload Protector Model BPM is a marvel of precision engineering and miniaturization, developed by Portex Technologies, India’s Leading Manufacturer and Supplier of Thermal Overload Protectors and Thermal Cutouts. Model BPM is the smallest thermal overload protector in our entire range of thermostats, specifically designed for over temperature protection of electronic and electrical equipment. This thermal overload protector is available with Normally Closed (NC) or Normally Open (NO) contacts. Due to small size, the response to temperature rise is fast, and when the equipment overheats, the thermostat trips off, ensuring complete protection to all equipment against burning or over heating.

Thermal Overload Protector inside Motor Winding

The outer body of this thermal overload protector is made of a high temperature engineering polymer and the contacts are made of solid silver for long life. The lead wires are teflon insulated and can withstand high temperature. This body is sealed with high temperature epoxy and so the operating characteristics are not affected by dust, fumes, varnish, etc. The operating principle of this thermal overload protector is based on the over center mechanism. This mechanism operates a snap action bimetal and a beryllium copper switching blade. This provides the thermal overload protector with quick make and break switching characteristic, stable trip temperature, even after continuous usage, and quick restart. The normal snap action disc thermostats have delayed restart and the trip temperature drifts after long usage.

Special Features of Thermal Overload Protector

  • Snap Action bimetal thermostat
  • Quick make and break switching
  • Small size for easy fitting
  • Chattering free and precise operating characteristics
  • Solid silver contacts for long life of 1,00,000 operations
  • Sealed body resistant to moisture, gases, fumes and varnish
  • Lead wires are teflon insulated
  • Available for any trip temperature required from 50 degrees C to 160 degrees C

Technical Specifications of Thermal Overload Protector

 Voltage Upto 250 VAC or 24 VDC
 Continuous Load Upto 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Switching Action SPST Normally Closed (N.C.) contacts which open with a snap action. Also available Normally Open (N.O.) contacts which close with a snap action.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode Automatic restart upon cooling. Adequate precaution must be exercised in applications where automatic restart can cause injury, i.e., power tools, mixie blade, power saws, machinery etc.

Heat Sink with Thermal Overload Protector inside Circuit

Applications of Thermal Overload Protector

  • Rechargeable Battery Pack Protection
  • Home Appliances
  • Motor overheat & burnout protection – all sizes (single and three phase)
  • Heating pads and Electric Blankets
  • Heat sink over-temperature sensor
  • Transformer overheat & burnout protection (all sizes)
  • Bearing and bushes overheat sensors
  • Industrial electronics: overheat protection of thyristors, power transistors, SCRs, etc.
  • Industrial machinery thermostat
  • Coils, solenoids and electromagnets

Model IR – Thermal Cutout

Thermal Cutout

Thermal Cutout Model IR is manufactured in India by Portex Technologies and was developed with a metal body, but, at the same time keeping the size small. This thermal cutout has a deep drawn seamless aluminum body which gives it strength and better temperature sensing capability. It is the smallest metal body thermal cutout in our complete range of thermal overload protectors. It has a high temperature resistance engineering polymer insulation in the inside and so the outer metal body is electrically insulated, hence, there is no chance of any electrical shock. Due to the inbuilt insulation, there is no need of a plastic insulating sleeve. It does not have any mounting arrangement as it is designed to be inserted in any cavity of the equipment. It can also be fixed with a clamp or any high temperature adhesive or it can be taped on to the equipment with a high temperature tape.

The operating principle of this thermal cutout is based on the over center mechanism, which operates a snap action bimetal strip and a beryllium copper switching blade. This mechanism is much more efficient that the snap action disc thermostat mechanism because it provides our thermal cutout with quick restart feature and stable trip temperature. The contacts of the metal body thermal cutout are made of solid silver. This gives the thermal cutout a long life and better performance characteristics. All the components of this thermal cutout are spot welded on a stainless steel housing plate. The lead wires are teflon insulated which can withstand high temperature. The body is doubled sealed with an industrial grade epoxy. Due to this the operating characteristics of our thermal cutout model IR are not affected by moisture, varnish, dust, etc. It is available with Normally Open (N.O.) and Normally Closed (N.C.) contacts.

Special Features of Thermal Cutout

  • Deep drawn seamless Aluminum body
  • Small size for easy fitting
  • Better temperature sensing and more strength
  • Snap Action bimetal Thermal Cutout
  • Quick make and break switching
  • No Chattering or sparking
  • Solid silver contacts for long life or 1,00,000 operations
  • Lead wires are teflon insulated.
  • Available with Normally Open (N.O.) or Normally Closed (N.C) contacts
  • Available for any trip temperature required from 50C to 160C.

Technical Specifications of Thermal Cutout

 Voltage Upto 250 VAC or 24 VDC
 Continuous Load Upto 8 AMPS
 Maximum Load Switching  Capacity 30 AMPS
 Contacts Configuration Available in Normally Open (N.O.) or Normally Closed (N.C) contacts
 Switching Action SPST Normally Closed (N.C.) contacts which open with a snap action. Also available Normally Open (N.O.) contacts which close with a snap action.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset between 50 ± 5 degrees C to 160 ± 5 degrees C specified by customer. Not adjustable.
 Reset Temperature Resets approx. 15 ± 5 C below trip temperature.
 Restart Mode Automatic restart upon cooling. Adequate precaution must be exercised in applications where automatic restart can cause injury, i.e., power tools, mixie blade, power saws, machinery etc.

Applications of Thermal Cutout

  • Heating Moulds
  • Welding equipment & gas pre-heaters
  • Motor overheat & burnout protection – all sizes (single and three phase)
  • Automotive and Lightings
  • Transformer overheat & burnout protection (all sizes)
  • Bearing and bushes overheat sensors
  • Industrial electronics: overheat protection of thyristors, power transistors, SCRs, etc.
  • Industrial machinery
  • Heat sinks over temperature sensor
  • Surface Heaters, Oven Thermostats

Model ISQA – Bimetal Thermostat

Bimetal Thermostat Models ISQA, ISQB and ISQC have been developed after extensive research and development by our engineering team to address the customers’ requirement of durability, rigidity of body and ease of mounting. These bimetal thermostats are the newest models in our range of products. Each bimetal thermostat has a solid machined aluminum body to provide greater strength. Due to the metal body, these bimetal thermostats have better heat sensing capability than ordinary thermal overload protectors.

Mounting Arrangements –

All the three models have different mounting arrangements to suit the customers’ needs.

    • Model ISQA has two holes at the end, by which it can be screwed on to any flat surface.
    • Model ISQB has two grooves, one on each end. It can also be mounted with two M3 screws.
    • Model ISQC has only one groove at the end, by which it can be screwed.

Bimetal Thermostat – Model ISQA

Snap Disc Thermostat – Model ISQB

Snap Action Thermostat- Model ISQC

The outer metal body of all these bimetal thermostats are electrically insulated, as there in inbuilt engineering polymer electrical insulation inside, and so there is no chance of any electrical shock. All the internal components are spot welded on a stainless steel housing plate. The operating principle of these thermal overload protectors are based on the over center mechanism which operate a snap action bimetal with a beryllium copper switching blade. This provides the bimetal thermostat with quick restart and stable trip temperature. The normal snap action disc thermostats are have delayed restart and the trip temperature drifts after long usage. The contacts are made of solid silver for long life. It is available with Normally Closed or Normally Open contacts. Due to the aluminum body, response to temperature rise is fast, and when the equipment overheats, the thermal overload protector will trip off, ensuring complete protection.

Special Features of Bimetal Thermostat:

      • Aluminum body for strength better heat sensing
      • Snap Action for quick make and break switching.
      • Chattering free and precise operating characteristics.
      • Solid silver contacts for long life.
      • Sealed body resistant to moisture, gases, fumes and varnish.
      • Lead wires are teflon insulated.
      • Available with Normally Open (N.O.) or Normally Closed (N.C) contacts
      • Available for any trip temperature required from 50C to 160C.

Technical Specifications

 Voltage Upto 250 VAC or 24 VDC
 Continuous Load Upto 8 AMPS
 Maximum Load Switching  Capacity 30 AMPS
 Switching Action SPST Normally Closed (N.C.) contacts which open with a snap action. Also available Normally Open (N.O.) contacts which close with a snap action.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Not adjustable.
 Reset Temperature Reset temperature approx. 15 ± 5 C below trip temperature.
 Restart Mode Automatic restart upon cooling. Adequate precaution must be exercised in applications where automatic restart can cause injury, i.e., power tools, mixie blade, power saws, machinery etc.

Applications

    • Heating Moulds
    • Welding equipment & gas pre-heaters
    • Motor overheat & burnout protection – all sizes (single and three phase)
    • Oven Thermostats
    • Transformer overheat & burnout protection (all sizes)
    • Industrial electronics: overheat protection of thyristors, power transistors, SCRs, etc.
    • Industrial Machinery
    • Aluminum channel heat sink over-temperature sensor
    • Surface Heaters
    • Bearing and bushes overheat sensors

Model ITD – Liquid Temperature Sensing & Oil Transformer

Liquid Temperature Sensing Thermostat – Model ITD

Thermostat Model ITD was designed specifically for monitoring temperature of liquids and for over temperature protection of oil transformers. This thermostat has a brass body machined from solid drawn rod. It has a 1/4″ BSP Hex nut threading for screwing into any location, like hydraulic lines, tanks, pipe lines, radiators, engines, oil filled transformers, oil baths etc. This thermostat is also available with a threaded extension at the lead end for conduit connection.

All the internal components and spot welded and the contacts are made of solid silver. This provide the thermostat with a long life. The body of the thermostat is double sealed and it is not affected by varnish, dust, fumes, gases, etc. The lead wires are teflon insulated and can with stand high temperature. This thermal overload protector is available with Normally Open (N.O.) or Normally Closed (N.C.) contacts.

The normal snap action disc thermostats have delayed restart and the trip temperature drifts downwards after using it for a few months. Our thermostats is based on the over center mechanism which operates a snap action bimetal and beryllium copper switching blade. This results in stable trip temperature even after continuous usage, quick restart and quick make and break switching.

Special Features:

  • Solid brass body for strength
  • Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
  • Better heat sensing capability
  • 1/4″ BSP threading for easy mounting
  • Solid silver contacts for long life of 1,00,000 operations
  • Snap action bimetal thermostat
  • Teflon insulated lead wires
  • Available in any temperature from 50C to 160C
  • Technical Specifications

 Voltage Upto 250 VAC or 24 VDC
 Continuous Load Upto 8 AMPS
 Maximum Load Switching  Capacity 30 AMPS
 Contacts Configuration Available in Normally Open (N.O.) or Normally Closed (N.C) contacts
 Switching Action SPST Normally Closed (N.C.) contacts which open with a snap action at preset temperature. Also available Normally Open (N.O.) contacts which close with a snap action at preset temperature.
 Flash-over Voltage Exceeds 2 KV between body & leads.
 Endurance (Life) Exceeds 100,000 operations (trippings).
 Trip Temperature Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
 Reset Temperature Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
 Restart Mode Automatic restart upon cooling.

Applications

  • Monitoring Temperature of liquids
  • Over Temperature protection of Oil filled transformers
  • Car Radiators and engines
  • Hydraulic lines and tanks
  • Pipelines for fluids and hot gases