Attention all-electric motor enthusiasts! Are you tired of dealing with overheating issues in your motors? Look no further than Saffty’s thermal protector. This innovative product is revolutionizing the way we protect our electric motors from damage caused by excessive heat. In this comprehensive guide, we will take a deep dive into the world of Saffty’s Thermal Protector and explore how it works, its benefits, and why it should be an essential component of every motor system. Get ready to learn everything you need to know about safeguarding your electric motors with Saffty’s thermal protector!

How Does It Work?

The thermal protector switch is used to protect electric motors from overheating. 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, and 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 is placed on top of the switch or relay. This way, when the temperature rises, it will cause more movement in the active layer and therefore will clear any obstruction causing an error in operation.

What are the Benefits of Using Saffty’s Thermal Protector?

Saftty‘s thermal protector is a high-quality, thermal protection switch for electric motors that have been UL, TUV, and CQC certified. It is also in a well-sealed design to prevent product failure from the vacuum impregnation process. Additionally, the Thermal Protection ST01 is small in size and suitable to be embedded inside the coil of electric motors. The motor thermal overload switch with a metal case can bear up to 50KG coil shaping pressure, which has high thermal conductivity and temperature sensitivity. Finally, pure temperature action type products, bimetal-disc without current and heat effect, and accurate temperature control make Saffty’s thermal protector an excellent choice for electric motors.


Saftty’s thermal protectors are essential for every motor. These protectors help keep your engine running cooler, which can prevent damage and prolong the life of your engine. If you’re looking for a durable and affordable solution to protecting your engine, then you need to check out Saftty’s lineup of thermal protectors.


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