Schneider Electric ZB4BC4 Harmony XB4 Mushroom Push Button Head Metal Red 40 mm 22 mm Push Button

The Schneider Electric ZB4BC4 is a Harmony XB4 mushroom push-button head with a red chromium-plated metal bezel, 40 mm across, for a standard 22 mm panel cutout. It operates on a spring return action and snaps onto a Harmony XB4/ZB4 contact block, giving a larger target for gloved or fast operation than a flush head.

Technical Specifications

Certifications & Standards

• BV
• CSA
• DNV
• LROS
• UL Listed
• EN/IEC 60947-1
• EN/IEC 60947-5-5
• EN/IEC 60947-5-1
• UL 508
• EN/IEC 60947-5-4
• CSA C22.2 No 14
• JIS C8201-5-1
• JIS C8201-1

Selection Notes

The ZB4BC4's 40 mm mushroom profile stands proud of the panel, so it can be hit with a gloved hand, a fist, or a forearm without aiming precisely at a 22 mm flush button — that makes it a fit for manual reset points and general-purpose stop/clear functions, not for emergency-stop duty, which uses the dedicated red palm-shaped XB4BS/ZB4BS heads instead. Combine it with a Harmony contact block for the required NO/NC configuration; pick the ZB4BC3 colour where the opposite stop/start convention applies.