Schneider Electric ZB4BR4 22 mm Mushroom Head Momentary Push Button Operator

22 mm Mushroom Head Operator

The Schneider Electric ZB4BR4 is a 22 mm mushroom head push button operator designed for industrial control panels. It provides a momentary contact action suitable for start, stop or emergency functions in automation systems. The red metal head and metal bezel are built for heavy use in demanding environments.

Sustained Load Behaviour

The operator carries NEMA ratings 1, 2, 3, 4, 4X and 13 plus an IP66 rating, meaning it resists dust, water jets and corrosion during continuous operation. Compliance with IEC 60068-2-6 and IEC 60068-2-27 confirms the device withstands vibration and shock over long service periods. Metal construction of the head, bezel and base material maintains mechanical integrity under repeated actuation.

Interface Practical Limits

The 22 mm mounting size fits standard panel cut-outs used in industrial machinery. Momentary action returns the contact to its default state when released, limiting use to functions that require brief engagement rather than maintained positions. Certifications including UL 508, CSA C22.2 No. 14, EN/IEC 60947-5-1 and IEC 60529 define the electrical and environmental boundaries within which the operator is approved for use.