KSD301 170°C Thermal Control Switch, normally closed (NC), 110V/120V/250V, 10A Type and rating Model: KSD301 Temperature rating: 170 degrees Celsius Contact: normally closed (NC) Voltage compatibility: 110V / 120V / 250V Current rating: 10A How it works Normally Closed: The contact remains closed until the temperature sensing exceeds the rated 170°C, at which point the switch opens to interrupt the circuit. Key advantages Double metal chip design for improved performance Fast dynamic response with sensitivity Reliable and stable actuation temperature Long service life No arc phenomenon during switching Construction and installation Flange: flat flange for easy mounting Pin width: 6.3 mm Applications and compatibility Suitable for electrical circuits that require a 170°C thermal cutoff Compatible with 110V, 120V, and 250V systems Ideal for protecting heating elements and temperaturesensitive equipment Use scenarios Overheat protection in household heating appliances and devices with heating elements (for example, toasters, kettles, or space heaters) to prevent operation beyond 170°C Thermal protection in power supplies, transformers, and electronics where a temperature cutoff is required Industrial equipment and machinery that incorporate heating elements or motors needing a reliable 170°C safety switch