Auxiliary & Definite Purpose Contactors

Browse the selection of contactors at F.W. Webb. A contactor controls how electricity flows in an HVAC system by turning the electrical switch or motor on and off. Use our helpful filters to sort the definite purpose and auxiliary contactors by size, amperage, coil voltage, and number of poles. Explore top-quality contactors from trusted makers, including Mars, Resideo, Copeland, White Rodgers, and Diversitech to find the right fit for an existing unit.

Frequently Asked Questions

What is the difference between contactor and relay?

The difference between a contactor and relay is that relays are designed to turn smaller devices on and off, while a contactor is for large devices with high voltage and currents.