MAX 250V10A(250V15A), cicle 16mm, high 12.5mm, KSD301 snap action thermostat series is a small-size bimetal thermostat series with a metal cap, which belongs to thermal relays'family. The main principle is that one function of bimetal discs ls snap action under the change of sensing temperature.

The snap action of disc can push the action of the contacts through the inside structure, then caused on or Off of the circit finally. The main characteristics are the fixation of working temperature, the reliable snap action, less flashover, longer working life and less radio interfernce.