The Omron Z15GQ22 is a panel-mount limit switch with a roller plunger actuator, delivering a snap-action SPDT changeover contact rated for 15 A at 250 V AC. The 0.5 mm contact gap and snap-action mechanism ensure clean make-and-break for position-sensing circuits in industrial machinery and conveyor systems.
The 15 A contact rating at 250 V AC covers most pilot-duty and small motor loads in control circuits — think solenoid valves, contactor coils, or indicator lamps. The SPDT form (changeover) gives you both normally-open and normally-closed poles in one housing, so you can wire a single switch for both a safe-state signal and a run-permissive without an extra relay. Snap-action operation means the contacts transfer at a fixed speed regardless of how slowly the plunger is depressed — eliminates contact chatter on slow-moving cams or slides. The ON–(OFF), OFF–(ON) function labels indicate momentary action: the switch returns to its resting state when the plunger is released.
The panel-mount roller plunger actuator suits flush-mount applications where the switch body is fixed and a moving machine part contacts the roller. The roller reduces cam wear compared to a plain plunger. Verify the mounting hole pattern matches your existing cutout — this is a standard Omron Z-series footprint.