KSD301 Ceramic Normally Closed NC Temperature Control Switch Thermostat - 70°C, 250V 10A

The KSD301 uses a bimetallic disc mechanism. Two bonded metals with different thermal expansion rates cause the disc to snap and physically open the electrical contacts when the calibrated temperature (70°C) is reached. It requires no external power and resets automatically once the temperature drops sufficiently.

No. The KSD301 is a fixed-setpoint thermostat. The bimetallic disc is factory-calibrated to snap at 70°C (with a typical tolerance of ±3°C to ±5°C). The setpoint is not user-adjustable. For a different temperature, you would need a model with a corresponding factory calibration.

This switch is rated for 10 Amperes at up to 250 Volts AC or DC. This rating typically applies to resistive loads (like heating elements). For highly inductive loads (like motors or transformers), derating or arc suppression may be necessary to ensure contact longevity and reliable switching.

For accurate response, the ceramic body of the switch must be in good thermal contact with the surface or medium being monitored. Mount it securely using the provided mounting holes, often with a thermal compound or conductive paste, and ensure the sensing area is not insulated from the heat source.