Manufacturing thermal protectors and switches since 2010.

what is HCET Thermal Protectors? | Haichuan

June 06, 2022

 As a experienced company in thermostats filed  for more than 10years  ,Our company pays 

great attention to the quality control,advanced testing equipment  and professional quality,

muliple  testing process to ensure that the product 100% qualified delivery .

Our products passed  multinational international safety certification  such as : UL,VDE,CQC  etc .


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What is a  HCET thermal protector?



How does HCET thermal protector work?


The design principle of the Thermal protector switch is to use bimetallic plates to make switches or relays. 

Two layers of alloys with different thermal expansion coefficients are laminated to form bimetallic plates. 

The active layer has a large expansion coefficient, whose passive layer is small. When the temperature rises, 

the bimetal will bend and deform due to the different expansion coefficients of the active layer and the passive

 layer. When the temperature is restored, the shape of the bimetal will also recover, thus forming a switch that 

closes and opens according to temperature changes. When installing the thermal protector, it is necessary to 

ensure that the thermal protector closer to the source of heat.


Features of HCET  thermal protector


The bimetallic thermal switch / thermal protector should be able to follow the thermal overload caused by the 

rapid or slow change of the temperature of the protected device, so it can closely match the thermal characteristics

 of the protected object and the correct choice can play a role. The thermal protector has the characteristics and 

advantages of round shape, smaller size, good sealed, stable and reliable performance, easy installation, and competitive price.


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