Product: KSD301 70°C Thermal Control Switch (NC), 110V/120V/250V, 10A, 6.3mm pin Key benefits Provides automatic, reliable overtemperature protection by opening the circuit when the sensing element reaches 70°C. Prevents overheating damage to components and reduces fire risk in electrical and heating equipment. Simple, fast installation and standard 6.3 mm pin terminals make replacement or retrofit straightforward. Important specifications Model: KSD301 Rated temperature: 70°C (opens when sensing temperature exceeds this value) Contact type: Normally Closed (NC) — contacts closed at ambient and open at or above 70°C Voltage ratings: 110V / 120V / 250V AC Current rating: 10A Terminal size: 6.3 mm pin (compatible with standard 6.3 mm quickdisconnect connectors) Mounting: Floating flange for easy alignment and installation What makes it stand out Double metal chip construction for stable, repeatable operation and accurate temperature response. Fastacting dynamic design delivers sensitive and reliable switching at the rated temperature. Stable action temperature and long service life for durable performance over many cycles. Designed to minimize arcing at contact break, improving safety and reliability. Function and performance Normal operating state: contacts closed, allowing current to flow. At or above 70°C: contacts open to interrupt the circuit and stop heat generation or shut down protected equipment. Suitable for use where a simple, reliable thermal cutoff is required and automatic reset or manual reset depends on circuit design. Compatibility and size Standard 6.3 mm pin terminals facilitate use with common quickdisconnect connectors and wiring harnesses. Compact form factor and floating flange simplify mounting in confined spaces and allow for minor alignment tolerance during installation. Typical applications Small household heating appliances (e.g., space heaters, kettles, coffee makers) to prevent overheating of heating elements. Motor and transformer protection to interrupt power if internal temperatures rise beyond safe limits. Electronic or industrial equipment cabinets and power supplies where temperature control is needed to protect components. Practical notes for installers Ensure correct orientation and secure connection to 6.3 mm terminals. Verify the switch rating (70°C, 110/120/250V, 10A) matches the application requirements before installation. likeforlike when servicing equipment to maintain intended safety performance.