The Allen-Bradley AMP FUSIBLE SAFETY SWITCH 600 VAC 3 POLE 1494H-DA3H6 is a sensor/switch from Allen-Bradley. It detects the presence, position, or proximity of a target object, or switches a circuit, outputting a signal to trigger or monitor a machine process. Key specifications noted on this listing include 600 VAC, 100 AMP, 3 POLE. It is commonly in factory automation and machine control retrofits.
