Schneider Electric ZB4BS52 Maintained Push-button Switch

Product Description

The SCHNEIDER ELECTRIC ZB4BS52 is a maintained-action, non-illuminated push-button switch designed for industrial control panel applications. Featuring a 22 mm mounting hole diameter and a round, extended mushroom-head operator in black metal, this switch holds its switched state after each press rather than returning to neutral. The metal operator construction and NEMA 4X and 13 ratings make it suitable for environments where moisture, dust, and corrosion resistance are required. Licensed electricians and control panel builders install this type of device in machine control, motor starters, and process equipment enclosures.

The ZB4BS52 is intended for use in industrial and commercial control panel applications where a maintained contact sequence is required. The 22 mm format is a widely adopted industry standard, making this switch compatible with similarly sized cutouts in existing enclosures and panels. Typical installations include conveyor systems, pump control stations, HVAC equipment panels, and general-purpose machine control circuits where the operator must stay engaged without continuous pressure.

Key Features

• Maintained (MA) operation — switch holds position after actuation, no spring return
• 22 mm mounting hole diameter — standard industrial panel cutout size
• Extended round mushroom-head operator in black metal construction
• Non-illuminated operator — no lamp or LED assembly required
• NEMA 13 and NEMA 4X ratings — resistant to dust, oil, and corrosive washdown environments
• Certified to multiple standards including UL 508, CSA C22.2 No. 14, EN/IEC 60947-5-1, and others

Compatibility

Designed as an OEM-style replacement or direct-install maintained push-button operator for 22 mm industrial control panel assemblies.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements and applicable local codes. De-energize and lock out the control panel before removing or installing any push-button operator. The 22 mm mounting hole should be deburred and clean before seating the operator to ensure the NEMA-rated seal seats correctly. Do not overtighten the mounting nut, as this can damage the operator body or compromise the ingress protection seal.