Generic KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 85°C NC, 10A 250V

At room temperature (below 85°C), the switch contacts are closed, allowing current to flow. When the temperature at the switch's metallic shell reaches its calibrated set point of 85°C, the internal bimetallic disc snaps and mechanically opens the contacts, breaking the circuit to provide over-temperature protection.

This switch is rated for a maximum of 10 Amperes at 250 Volts, either AC or DC, for resistive loads. For inductive loads (like motors or transformers), derating is recommended to ensure longevity and prevent contact arcing. Always check your specific load characteristics against the switch rating.

Install the switch by firmly mounting its metallic shell to the component or surface whose temperature you need to monitor, using thermal paste if necessary for better heat transfer. Wire it in series with the load (e.g., a heating element or motor) using the provided 7cm leads. The switch will automatically reset and close the circuit once the temperature cools below the trip point.

The trip temperature for the KSD9700/BK05-BB1D model is factory pre-set to 85°C and is not user-adjustable. The tolerance is typically around ±5°C. For a different trip point, you would need to select a different model from the KSD9700 series with the corresponding temperature code.