KSD9700/BK05-BB1D Metallic Shell Temperature Control Switch - 10A 250V, 35°C Normally Closed

This is a manual-reset type switch via cooling. Once the ambient temperature exceeds the 35°C set point, the bimetallic disc snaps to open the circuit. The contacts will remain open until the temperature cools significantly below the set point (typically by 10-15°C), allowing the disc to snap back and re-close the contacts automatically. It does not require a physical button press.

Yes, but primarily as a safety cutoff, not for precise temperature regulation. Its Normally Closed (NC) configuration is ideal for series connection in the power line of a heating element. If the system overheats (reaches 35°C at the switch location), it will cut power. For cyclical on/off control within a narrow band, a modulating thermostat with a wider differential is more appropriate.

The switch is rated for 250V, which applies to both AC and DC circuits. The 10A current rating is typically for resistive loads. When switching inductive loads (like motors), the rating may need derating, and a snubber circuit might be recommended to protect the contacts from arcing and extend the switch's operational life.

For accurate sensing, the metallic shell must be in good thermal contact with the component or surface you intend to monitor. Mount it using thermal adhesive, a clamp, or by securing it directly to a hot spot (e.g., motor housing, heatsink). Ensure the attached wires are strain-relieved and kept away from other heat sources to prevent false triggering.