The O53GAB140A-125Y is bimetallic thermostat with positive snap action, single pole/single throw, provides accurate and reliable sensing and switching in a single device. This thermostat is ideal for applications when space is at a premium. Overall depth without projecting terminals is only 0.250 inches. The basic switch assembly is operated by a bimetal disc with positive, reinforced snap-action, which is known for its reliable repeatability. The construction of the switch assembly offers excellent shock and vibration resistance. Thermal response is fast due to low mass. Offers many terminal and mounting options to fit your application needs. For high humidity and contaminating atmosphere applications, the device is sealed with a non-volatile resin. Narrow differential devices are ideal for control, while standard differentials can be used for high or low temperature limit switches.