Generic KSD302 Ceramic Temperature Switch Thermostat - 140°C NC, 250V 16A

Normally Closed means the electrical contacts inside the switch are closed, allowing current to flow, at temperatures below its setpoint (140°C). When the sensed temperature rises to or above 140°C, the internal bimetallic disc snaps and mechanically opens the contacts, breaking the circuit. This design provides automatic power cut-off in an over-temperature condition.

Yes, the switch is rated for 16A at 250V AC, which is suitable for directly switching resistive loads like heating elements within that rating. Ensure your load (e.g., heater) does not exceed 16A. For inductive loads like motors, derating or using an intermediate relay is often recommended to handle inrush currents.

The ceramic housing typically has mounting holes or a bracket for secure installation near the heat source. Electrically, it is wired in series with the load (e.g., heater) and the power supply. The two terminal screws connect the live wire through the switch, so that when it opens at 140°C, it interrupts power to the load.

The setpoint is fixed at 140°C and is not user-adjustable. It is factory-calibrated via the specific bimetallic disc inside. The trip tolerance is typically ±3-5°C. For a different trip temperature, you would need a different model (e.g., KSD301 for 120°C, KSD303 for 150°C).