KSD301 Ceramic Normally Open NC Thermostat Switch - 50°C, 250V 10A

No, the KSD301 is a single-use, non-resettable thermal cutoff (TCO) switch. Once its internal bimetallic disc snaps open at 50°C, the circuit is permanently broken and the device must be replaced. This design provides fail-safe protection against overheating.

The KSD301 is rated for 250 volts AC or DC and can switch up to 10 amps of current. This rating applies to resistive loads; for inductive loads (like motors), derating may be necessary. Always ensure your application's voltage and inrush current do not exceed these specifications.

Wire the two terminals in series with the load (e.g., a heating element or motor) and the power source. The switch acts as a closed circuit under 50°C. When the ambient temperature reaches 50°C, the contacts open permanently, interrupting power to the load to prevent damage.

No, it is designed solely for over-temperature protection, not for cycling control. For temperature regulation that requires cycling on and off, a resettable, cycling thermostat (like a KSD9700) should be used. The KSD301 provides a one-time, irreversible safety cutoff.