This is one of the semiconductor types. This part name is KSD301.
This product has Thermostat Device functions.
Manufacturers of product is ETC.
Image and pinout :
KSD301 PDF Datasheet
Some of the text files within the PDF file
Specification of KSD301 Thermostat Device Cosmetic Demension Electrical Characteristic: Rated Electric property Circuit Control Method Operating Temperature Break-off Temperature Range Break Temperature Difference Reset Temperature Tolerance Useful life Normalcy Electric Strength The insulation Resistance Contact Internal Resistance Thermal Resistance Application AC125/250V – — 10A (resistive load) Normal Close/ Normal Open (automatic reset) 45! ~ 240! (customization) ±1.5!0 ±2!0 ±3!0 ±5! 8!ÿ^ 150! (customization) ±5!0 ±10! ≥40000 times (automatic reset) AC 50Hz/2000V for 1 min without breakdown and flashover ≥100MΩÿ DC500V meggerÿ ≤50mΩ Operating Temperature ≤150! / Install Surface Temperature ≤160! Temperature Control or Over Heat Protection for Household Appliances and Electronic Element Device Attention: 1. Customer must choose the correct model number according to the specification of their products. 2. When the thermostat using the contact feeling temper [ … ]
Please refer to the file for details.