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Black 22 mm mushroom push button with plastic head and bezel

Schneider Electric

Schneider Electric ZB5AT24 22 mm mushroom push button black

SKU CH-MBYZ-2DSV4

A 22 mm maintained mushroom-head push button with IP66 and NEMA 1, 2, 3, 4, 4X, 13 ratings for industrial control panels

  • Size22 mm
  • Product typeIndustrial Electrical Controls & Automation
  • 22 mm mushroom head fits standard panel cut-outs
  • Maintained action stays engaged until pressed again
  • IP66 and NEMA 1, 2, 3, 4, 4X, 13 ratings seal out dust and water
  • Plastic construction resists corrosion in harsh environments
  • Certified to IEC 60947, UL 508, CSA 22.2 and RoHS standards

Industrial 22 mm mushroom push button

This Schneider Electric ZB5AT24 is a 22 mm maintained mushroom-head push button designed for industrial control panels and machinery interfaces. The black plastic head, bezel and body provide IP66 protection against dust and powerful water jets. It carries NEMA 1, 2, 3, 4, 4X and 13 ratings for indoor and outdoor use. The operator meets IEC 60947, UL 508, CSA C22.2 No. 14 and other international standards.

Replaces worn or missing 22 mm operators

Install this unit when an existing 22 mm mushroom button fails, becomes illegible or no longer latches reliably. The maintained action suits emergency-stop or start-hold functions where the button must stay depressed until manually reset. The jump is worth it when the panel cut-out is already 22 mm and the application demands IP66 and the listed NEMA ratings without changing the enclosure.

Limited to 22 mm cut-outs and maintained action

This operator fits only a 22 mm panel cut-out and cannot be used in 30 mm or other hole sizes. The maintained latching mechanism is unsuitable for momentary-contact requirements. The 30 mm mushroom head diameter is fixed and cannot be swapped for smaller or larger caps. Compliance is documented to the listed IEC, UL, CSA, DNV, GL, LROS, JIS and Bureau Veritas standards only.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $23.99
Pricier than about 56% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameSCHNEIDER ELECTRIC
Product typeIndustrial Electrical Controls & Automation
Size & build
Size22 mm

Questions about this item

What panel cut-out diameter does the 22 mm mushroom push button require?

The operator fits a standard 22 mm panel cut-out and is secured with the threaded bezel supplied with the unit.

How is the maintained mushroom head installed and which step is often missed?

Insert the operator through the 22 mm hole, tighten the locking nut from behind, then snap the 30 mm mushroom head onto the operator until it clicks; the click is the step installers sometimes skip.

When should the mushroom head or operator be replaced?

Replace the head if the black plastic shows cracks, fading or deformation, or if the maintained latch no longer holds position; the operator body should be swapped if the IP66 seal is compromised or contacts fail testing.

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