KSD301 80°C Normally Closed NC Temperature Control Switch Thermostat - Bakelite, 250V 10A

Normally Closed (NC) means the electrical contacts inside the switch are closed at room temperature, allowing current to flow. When the sensing temperature reaches the calibrated set point of 80°C, the bimetallic disc snaps and opens the contacts, breaking the circuit. This design is ideal for safety cutoff applications where power must be removed upon over-temperature.

Yes, the switch is rated for 250V AC/DC. However, the 10A current rating applies to resistive loads. For inductive loads (like motors or solenoids), derating may be necessary to account for inrush currents and arcing. Always ensure your operating voltage does not exceed 250V.

Install the switch so its metal sensing face is in good thermal contact with the surface or environment you wish to monitor. Use the mounting holes to secure it. Wire it in series with the load (e.g., heating element) and power source using the screw terminals. Since it's NC, the load will be powered until the 80°C trip point is reached, at which point the circuit opens.

No, the KSD301 is a fixed-set-point thermostat. The bimetallic disc is factory-calibrated to snap at approximately 80°C (with a typical tolerance of ±5°C). It is not user-adjustable. For a different temperature, you would need a model with a different pre-set rating.