KSD301 150°C Normally Closed (NC) Thermal Control Switch – 10A 250V Bimetal Snap-Action Thermostat for High-Temperature Protection

The KSD301 150°C is a heavy-duty bimetal thermostat designed as a critical safety cutoff for equipment operating in high-temperature environments. As a "Normally Closed" (NC) switch, it maintains a continuous electrical path during standard operation. However, should the surface temperature reach the critical 150°C mark, the internal bimetal disc snaps instantly to open the circuit. This autonomous action prevents catastrophic overheating in devices such as electric ovens, industrial heaters, and high-performance power electronics. Designed for durability and precision, this switch features a rugged bakelite or ceramic housing that can withstand the rigors of high-heat environments without degrading. Its fixed mounting flange allows for easy and secure attachment to heat sinks, chassis, or flat heating surfaces, ensuring that the sensor is always in the most effective position to detect thermal runaway. The automatic reset feature ensures that the device can return to service once safe temperatures are restored, minimizing downtime in industrial workflows. From professional-grade coffee roasters and commercial steamers to sophisticated medical sterilizers, the KSD301 150°C provides a cost-effective and reliable layer of thermal defense. By providing a mechanical cutoff that operates independently of any software or complex electronics, it offers the ultimate "fail-safe" for your most heat-intensive projects. Trust this industrial-standard component to deliver consistent protection and peace of mind for your high-power electronic designs.

Key Features:

Instant Snap-Action Response: Utilizes a high-speed bimetal disc mechanism that ensures a clean, arc-minimized circuit break the moment the temperature limit is reached.

Heavy-Duty Rating: Capable of handling electrical loads up to 10A at 250V AC, providing robust performance for heating elements and high-power motors.

Automatic Reset Function: Automatically re-closes the circuit once the temperature cools down approximately 20–30°C below the trip point (Reset at ~120°C–130°C).

Thermal-Efficient Metal Cap: Features a high-quality aluminum sensing cap designed for direct contact mounting, ensuring rapid and accurate thermal conductivity.

Universal 6.3mm Terminals: Equipped with industry-standard 6.3mm (1/4") quick-connect spade terminals for fast, secure, and tool-less wiring in professional assemblies.