NOREx9CKT20A20B7 – Definite Purpose Contactor, 20A, 2NO, 24V 50/60Hz Coil

The Ex9CKT series is a definite purpose contactor designed specifically for HVAC and refrigeration loads — such as compressors, condenser fan motors, and electric heating elements. It is not a general-purpose IEC or NEMA motor starter contactor, so it should be matched to the definite purpose load ratings outlined in the Noark Ex9CKT datasheet.

Yes — the 24V AC coil is the standard control voltage used in residential and light commercial HVAC thermostats, making this contactor a direct fit for thermostat-driven applications. Confirm that your thermostat's VA output is sufficient to energize the coil; refer to the Noark Ex9CKT spec sheet for exact coil burden (VA) requirements.

The Ex9CKT series is designed to be dimensionally and electrically comparable to common definite purpose contactors from other manufacturers (such as Honeywell/Resideo, Schneider, or White-Rodgers) in the same amperage and pole configuration. However, always verify coil voltage, contact rating, and mounting footprint before substituting. Our team can help cross-reference your existing unit — reach out with the original part number and we'll confirm compatibility.