Schneider Electric ZB4BG220 Key Selector Switch 22mm

Product Description

The SCHNEIDER ELECTRIC ZB4BG220 is a 2-position maintained key selector switch designed for industrial control panel and machine operator interface applications. The operator uses a black key that can be removed only in the left position, preventing unauthorized or accidental actuation. The unit features a round, non-illuminated metal bezel head with a 22 mm mounting hole diameter. Rated IP69K, it withstands high-pressure washdowns, shock, vibration, and water ingress — making it well suited for demanding industrial and food-processing environments. The switch weighs 0.15 pounds and carries NEMA 4X and NEMA 13 ratings alongside a broad set of international certifications.

This key selector switch is appropriate for use in industrial machinery, automated equipment, and control stations where a lockout or access-restricted operator interface is required. Its maintained-action operation means the switch stays in the selected position after the key is turned, making it suitable for mode selection, enable/disable functions, and safety interlock circuits in both light and heavy industrial settings. Electricians and control panel builders typically install this component during new panel builds or maintenance replacements.

Key Features

• 2-position maintained (MA) operation — holds selected position without continuous operator input
• Black key operator with left-position key removal for access restriction
• IP69K ingress protection — rated for high-pressure, high-temperature washdown environments
• NEMA 13 and NEMA 4X enclosure ratings for oil and water resistance
• Round metal bezel head — shock-resistant, vibration-resistant, and water-resistant construction
• 22 mm mounting hole diameter — fits standard 22 mm panel cutouts

Compatibility

Designed as an OEM-style operator head for use with 22 mm Harmony XB4 series contact block and body assemblies in standard industrial control panel applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC and applicable local codes. De-energize the control panel and verify zero energy state before removing or installing any operator components. A 22 mm panel knockout or drilled hole is required for proper mounting. Do not overtighten the bezel nut, as this can crack the panel or distort the mounting threads.