KSD301 Ceramic Normally Closed (NC) Temperature Control Switch Thermostat - 90°C, 250V 16A

The KSD301 is a Normally Closed (NC) switch. This means the electrical contacts are closed, allowing current to flow, when the temperature is below its 90°C setpoint. When the sensed temperature reaches or exceeds 90°C, the internal bimetallic disc snaps and mechanically opens the contacts, breaking the circuit to provide over-temperature protection.

Yes, the KSD301 is rated for use with both AC and DC voltages up to 250V. The 16A current rating applies to both types of loads. However, for highly inductive DC loads (like motors or solenoids), switching life may be reduced compared to resistive loads due to arcing.

Mount the thermostat securely using its provided holes, ensuring good thermal contact with the surface or medium you wish to monitor. Wire the two terminals in series with the load (e.g., a heating element) and the power source. The switch will automatically interrupt power to the load when its local temperature reaches 90°C.

No, the KSD301 features a fixed, factory-calibrated actuation temperature of 90°C. It is not user-adjustable. For applications requiring a different trip point, you must select a thermostat model with the corresponding fixed temperature rating.

Standard bimetallic thermostats like the KSD301 typically have an actuation tolerance of ±3°C to ±5°C around the stated setpoint (90°C). This variance is due to the mechanical nature of the bimetallic element. For applications requiring precise temperature control, an electronic sensor and controller are recommended.