ESD440 is a four-pole, 40A, DIN-style contactor manufactured by Hager and designed to power devices at 24VAC. It features four normally open (NO) contacts, which will close to connect the source and output when a control voltage is applied. It is capable of operating in a temperature range of -10°C to 50°C. It is ideal for applications requiring switching to control motors, solenoids, relays, and other devices. Its robust design makes it suitable for use in industrial, commercial, and residential applications.