Schneider Electric ZB4BW0G42 Lamp Module and Contact Block

Schneider Electric ZB4BW0G42 Lamp Module and Contact Block is a complete 22 mm Harmony XB4 assembly that combines an integrated indicator light with a single normally closed (1NC) contact for use with XB4 push-button heads. It is designed for direct connection to 110–120 VAC (50/60 Hz) and wires via screw-clamp terminals, delivering a compact signaling solution for control panels, machines, and automation circuits. The unit is specified as a complete body/contact assembly and light block, intended to be mounted in 22 mm panel cutouts, providing an illuminated indicator alongside a dedicated NC contact within a single, field-wirable module. Widely cataloged and distributed by Schneider Electric and authorized distributors, the ZB4BW0G42 is documented as a 110–120 V AC lamp module and contact block compatible with Harmony XB4 22 mm pilot-light configurations, with wiring through screw-clamp terminals for reliable connections. This configuration supports straightforward signaling and interlock scenarios in industrial control enclosures where space and simplicity matter.