Schneider Electric XCK J5951B0H4 Safety Interlock Switch

The Schneider Electric XCK J5951B0H4 Safety Interlock Switch is a heavy‑duty metal interlock assembly with a keyed actuator designed for machine guarding, monitoring safety gates and preventing hazardous operation until the door is closed, locked, and the actuator key is engaged. This safety switch features 1 normally open plus 1 normally closed contact with positive‑opening safety contacts, a 240 VAC rated operating voltage, 3 A rated current, and a 24 VDC coil, all housed in a metal, surface‑mount unit with a 1/2 in NPTF threaded cable entry. It includes a matching actuator key and is commonly used on industrial machinery, robotic cells, packaging equipment, conveyors, and automated production lines requiring keyed interlocking to keep equipment off whenever a guard is open; common replacements include Telemecanique XCSC501, XCSC511, and XCSZ12.