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Red metal mushroom head push button, 22 mm mount, 60 mm diameter cap

Schneider Electric

Schneider Electric ZB4BR4 22 mm Mushroom Head Momentary Push Button Operator

SKU CH-0SWF-1RA28

A 22 mm red mushroom-head push button with momentary action, metal construction and IP66 sealing for industrial control panels

  • TypeIndustrial Electrical Controls & Automation
  • Size22 mm
  • Reliable emergency stop control with 60 mm mushroom head
  • Durable all-metal construction resists harsh industrial environments
  • Momentary action returns automatically for precise machine control
  • IP66 and NEMA 4X ratings seal against dust and water jets
  • Complies with IEC 60947-5-1 and UL 508 safety standards

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.

Highlights

  • Reliable emergency stop control with 60 mm mushroom head
  • Durable all-metal construction resists harsh industrial environments
  • Momentary action returns automatically for precise machine control
  • IP66 and NEMA 4X ratings seal against dust and water jets
  • Complies with IEC 60947-5-1 and UL 508 safety standards

Specifications

BrandSCHNEIDER ELECTRIC
TypeIndustrial Electrical Controls & Automation
Size22 mm

Questions about this item

Does the 22 mm mushroom head generate noticeable heat or noise during continuous operation?

The operator is a passive mechanical switch with no internal power consumption, so it produces no heat or noise of its own.

What contact block or mounting hardware must I already have to install this ZB4BR4 unit?

You need a compatible Schneider Electric contact block and a standard 22 mm panel cut-out; the operator mounts directly into that opening.

Will this red mushroom head fit alongside older Schneider Electric 22 mm operators already on my panel?

Yes, it shares the same 22 mm mounting diameter and metal bezel design as legacy Harmony series units, so it aligns with existing cut-outs.

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