LiftMaster K24-24-6 Commercial Operator Relay – 24VAC, 10A, 3PDT

The LiftMaster K24-24-6 is a replacement electromechanical relay for select LiftMaster mechanical commercial door operators and control systems. Its triple-pole, double-throw contact arrangement allows three separate circuits to be switched between normally open and normally closed states from one 24VAC control signal.

This relay is commonly used in operator control, brake and auxiliary switching circuits where the equipment specifically requires a 24VAC 3PDT relay.

Specifications

• Manufacturer: LiftMaster

• Manufacturer part number: K24-24-6

• Related references: 24-24-6, 24246 and G24246

• Coil voltage: 24VAC

• Contact configuration: 3PDT

• Number of poles: Three

• Contact function: Double throw

• Listed current rating: 10A

• Component type: Commercial operator replacement relay

• Application: Select mechanical commercial door operators

• Quantity: One relay

Compatibility

Use only when the operator’s parts diagram or electrical schematic specifies K24-24-6, 24-24-6, 24246 or a confirmed equivalent 24VAC 3PDT relay.

Before ordering, compare:

• Coil voltage

• AC versus DC coil requirement

• Contact configuration

• Current rating

• Terminal count and arrangement

• Physical dimensions

• Mounting method

• Existing relay and operator part numbers

A relay with the wrong contact arrangement can cause improper sequencing, brake operation or control behavior. Do not substitute a DPDT relay where the circuit requires three switched poles.

For a compatible system requiring two switched poles, see the LiftMaster K24-24-1 24VAC DPDT Relay.

The LiftMaster 115V DPDT Relay and LiftMaster 230V 3PDT Relay are available for operator circuits specifying those coil voltages.

Diagnostic and Installation Notes

Before replacing the relay, inspect the coil circuit, contact terminals, socket, wiring harness and connected load. Burned contacts may indicate excessive current, loose terminals or a failing connected component.

Disconnect and lock out operator power before servicing. Label every wire before removal and transfer connections one terminal at a time according to the operator’s electrical schematic. Commercial operator electrical repairs should be completed by a qualified technician.