The Omron D4NL1HFGB is a safety-door interlock switch with a solenoid lock and key actuator, built for guarding access on industrial machinery. It carries 3NC plus 2NC contacts — five total — wired through screw terminals, and the solenoid holds the door locked until power is removed or a control signal releases it. Rated IP67, so the body and key entry withstand washdown environments and airborne dust on the plant floor.
Switching capacity is 3 A at 240 V AC and 270 mA at 250 V DC. The AC figure covers control-circuit loads like contactor coils and indicator lamps; the DC rating is lower because DC arcs sustain longer — 270 mA is fine for PLC inputs and small solenoids but not for a DC motor brake. Electrical endurance is 500,000 cycles, mechanical endurance 1 million cycles, so this switch is specced for high-cycle production lines, not occasional maintenance doors.
Dimensions: 88.5 mm wide, 95 mm tall, 35.5 mm deep. That depth is shallow enough to fit inside a standard 40 mm profile-frame guard; the width is wider than a typical limit switch, so check the mounting bracket or tapped-hole pattern on your door frame. The actuator head accepts four orientations (top, bottom, left, right) — rotate the head in the field to match the door swing without ordering a different variant.