Generic KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 105°C NC, 10A 250V

This switch has a fixed trip temperature of 105°C (221°F). It is configured as Normally Closed (NC), meaning the contacts are closed under normal conditions and will open to break the circuit once the surrounding temperature reaches 105°C.

The switch is rated for a maximum current of 10 Amps at a voltage of up to 250 Volts, either AC or DC. This rating is typically for resistive loads. For inductive loads (like motors), derating may be necessary to account for inrush currents and arcing.

Install the switch in direct thermal contact with the component or surface you need to monitor (e.g., motor housing, heatsink). Connect it in series with the live wire of the power line to the device being protected. The two wire leads are not polarized. Ensure the metallic shell is properly mounted for accurate temperature sensing.

Yes, this is an automatic reset thermostat. Once the temperature cools down sufficiently below the 105°C trip point (typically by 10-20°C), the bimetallic disc will snap back, closing the contacts and restoring power to the circuit automatically.