AUTOMATIC FAN CONTROLLER switch is an electronic device which opens and closes contacts to control the flow of electrical current in response to temperature change.APPLICATIONS INCLUDE: Plastics extruder barrel over temp detection. Brake over temp indication Engine cooling fan control Clutch over temp in escalators Bleed air over temp indication on aircraft environmental control systems Window defrost over temp on military vehicles Over temp in refinery process Avionics over temp on aircraft avionics Gas shut-off flame detection on railroad switch de-icing Flame detection in aircraft engine FEATURES For use where space is limited Small bimetal sensing element Snap-Action switch SPECIFICATIONS Range : 60 to 120°F ?(15 to 49°C)Switch Action :Close on Rise Voltage: 120/230 Vac 1P/3PFAN Full Load: 6A, 10A, 16A, 20A, 30A