Thermal Protector

The S7AM Thermal Protector is a thermally operated snap-action device which delivers the maximum protection in the smallest package. The operating principle of the S7AM is both simple and effective. At the center of the protector is a bi-metal snap-action strip. When the temperature of the strip reaches its calibrated temperature, it snaps open, resulting in an open circuit. This temperature is reached by either an increase in
ambient temperature, an increase in current flowing through the strip, or a
combination of both. After the S7AM breaks the circuit, the system cools and the S7AM automatically resets allowing power to be restored to the circuit.

Each S7AM rating has a bi-metal strip designed and manufactured for that specific temperature rating. Each device is then calibrated and checked for opening temperature. This results in precise operating characteristics necessary to achieve consistent, reliable performance over the required life cycle.

The S7AM comes standard without leads and can be customized with leads, connectors and sleeves per your request. For details regarding custom thermal protector assemblies, please contact Selco directly.