Schneider Electric ZB4BG3 Key Selector Switch 3-position

Product Description

The SCHNEIDER ELECTRIC ZB4BG3 is a 3-position, maintained-action key selector switch operator designed for industrial control panel applications. Featuring a round, metal-bezel head with a 22mm mounting hole diameter, this non-illuminated operator accepts a black key that is removable in the center position. The unit carries an IP69K ingress protection rating, making it suitable for high-pressure washdown and harsh environments. It is shock-resistant, vibration-resistant, and water-resistant. Licensed electricians and industrial panel builders install this operator as part of a complete selector switch assembly in NEMA 13 and 4X-rated enclosures.

The ZB4BG3 is intended for industrial and commercial control panel installations where a key-operated, 3-position maintained selector is required. The maintained-action design holds each position until deliberately moved, making it well-suited for machine control circuits, motor start-stop-jog selectors, and access-controlled switching applications. The NEMA 13 and 4X ratings support use in environments exposed to dust, oil, and corrosive conditions. Its 22mm round-head format is a widely used standard footprint in industrial operator stations.

Key Features

• 3-position maintained-action operation holds the selected position without spring return
• Key operator with center-position key removal for access control and lockout applications
• IP69K ingress protection rating withstands high-pressure, high-temperature washdown
• Metal bezel construction with shock-resistant and vibration-resistant design
• 22mm round-head footprint fits standard industrial enclosure cutouts
• NEMA 13 and 4X rated for dust-tight, oil-tight, and corrosion-resistant installations

Compatibility

Designed for use as a 22mm round-head key selector switch operator in NEMA 13 and 4X-rated industrial control enclosures and operator stations.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements and the enclosure manufacturer's instructions. De-energize and lock out the control panel before mounting or wiring the operator. The 22mm mounting hole should be deburred and clean before inserting the operator head to ensure proper IP sealing. Do not overtighten the mounting nut, as this may distort the bezel or compromise the ingress protection seal.