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Thermal Protectors

Custom thermowells from Calco Electric for temperature protection are available in SS 316, CS, Brass, Titanium Monel & Hastelloys materials.

  • Options available include: Threaded, flanged, socket weld, tapered and straight.
  • Instrument connection: -1/2" NPT/NPSM
  • Insertion length (U) up to 28"
  • One piece construction
  • Cap & chain available upon request
  • Other thread sizes available upon request
  • 100% factory tested
  • NACE certification available upon request
  • Heat code traceability


thermal motor protector tp1 series

The TP1 Series Thermal Protector from Calco Electric offers rapid response motor protection.  It features a Rhomboid shape small size, Good pressure resistance, High switching capacity, Minimal contact resistance, is both Temperature and current sensitive and has Rapid response.

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ck model thermal protectorsCalco is offering a series of high technology of snap action thermal protectors designed by a cost effective solution and reliable quality assurance for protection in motor, transformer and lighting applications. Available with various bimetallic elements to match the current sensitivity of the device to the application.

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brm5 thermal battery protector

Calco’s Model BRMS Battery (Thermal) Protector is used for over temperature and over current protection in battery packs. The BRMS battery protector has been designed for easy placement between battery cells. It is available with insulated wire leads or a nickel plated strip with an insulation sleeve.

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Thermal Protector

The TB02 Series Auto Reset miniature thermal protector is one of the smallest devices manufactured in the world.  It is comprised of a miniature bimetal snap disc that is both current and temperature sensitive.  Operation of this thermal protector occurs when the temperature of the bimetal disc reaches its’ precalibrated set point by a combination of high current or high temperatures or a combination of both. The TB02 series offers a proven protector for use in battery packs, motors transformers, and  ballasts and heating appliances.

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Thermal Protector TB97The TB 97 high temperature thermal protector / thermostat is based on reliable bimetal snap-disc technology and is specially designed for application where high temperature are needed, with a maximum switching temperature of 450°C.

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Motor Protector

The TP2 Series thermal protector features a miniature size, positive make and break with snap-action disc, repeatable temperature performance over life, suitable for most impregnation processes, good DC/AC performance and a high grade thermoplastic insulated case. Used for HID ballasts, battery packs, fractional power motors, AC brushless motors, DC motors, heating appliances and transformers. Temp. range 45°C-140°C. Contact rating 12 Amps @ 120V.

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thermal Protector

The ST01 Series is a small and easy to install thermal protector. It has accurate temperature response, is temperature sensitive, compact & pressure stable and is used in motors, transformers, coils and electronics.

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Temperature Converter