APL1-28218-1 is a snap action,0.187 tab-style, normally open contact switch manufactured by Sensata. It features an offset contact design, with .187" sealed tabs, and a rated maximum voltage of 250 VAC. The APL1-28218-1 is a single-pole, single-throw mechanical contact switch with a 15A current rating. It is designed to be used for single switch applications, such as emergency stop switches, power-on switches, and other switching operations that require an emergency-stop function. It is Operating temperature is -25°C to 85°C and Operating humidity range is 5% to 85%.It is UL listed, RoHS compliant, and meets CSA specifications.