Schneider Electric ZB4BH03 Maintained Push-button Switch

Product Description

The SCHNEIDER ELECTRIC ZB4BH03 is a maintained-action push-button switch designed for industrial control panel and machine operator interface applications. The switch features a flush-style, round green button made of metal, and mounts through a 22 mm panel hole. Maintained operation means the switch holds its contact state after each press until actuated again, making it suitable for on/off or start/stop control circuits. It carries UL Listed, CSA, and IEC certifications and is rated for NEMA 4X and NEMA 13 environments, confirming resistance to dust, oil, and water ingress. Licensed electricians and control panel builders are the typical installers.

The ZB4BH03 is used in industrial and commercial control panels, machine tool enclosures, and process automation equipment where a durable, corrosion-resistant operator element is required. The NEMA 4X rating makes it appropriate for wash-down environments, marine applications, and outdoor enclosures. Its 22 mm mounting diameter is a standard industrial panel cutout size, compatible with a wide range of enclosure types. The green color convention typically indicates a start or run function in standard panel wiring practice.

Key Features

• Maintained contact operation — holds state after each actuation without requiring continuous pressure
• 22 mm standard mounting hole diameter for compatibility with common industrial panel cutouts
• Flush-style round green metal push button for durability in demanding environments
• NEMA 4X and NEMA 13 rated for protection against dust, oil, and water ingress
• UL Listed and CSA certified; compliant with EN/IEC 60947-1 and EN/IEC 60947-5-1 standards
• Additional certifications include Bureau Veritas, DNV, GL, RINA, LROS, and JIS C 4520 for marine and international applications

Compatibility

Designed as an OEM-style replacement or new-installation push-button operator for 22 mm industrial control panel assemblies requiring a maintained-action green flush button.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements and the enclosure manufacturer guidelines. De-energize the control panel and lock out all power sources before installing or servicing this switch. Ensure the panel cutout is clean and dimensionally correct at 22 mm before mounting. Do not exceed the switch contact ratings specified in the full product datasheet.