Square D XB4BG21 Key Selector Switch 2-position Nema 4X

Product Description

The SQUARE D XB4BG21 is a 2-position maintained key selector switch designed for industrial control panel applications. It uses a black key operator with a chrome metal bezel and mounts through a 0.87-inch (22 mm) panel hole. The switch is non-illuminated and features a normally open (NO) contact configuration with screw clamp terminals. Rated IP69K and NEMA 4X and 13, it is built to withstand high-pressure washdowns, dust ingress, shock, and vibration. Licensed electricians and panel builders install this switch as part of machine control or process control circuits.

The XB4BG21 is suited for industrial and commercial control panel installations where a key-operated, tamper-resistant selector is required. Typical applications include motor control, machine enable/disable circuits, and access-controlled process switching. The maintained operation means the switch holds its position after the key is turned, making it appropriate for applications requiring a latched on or off state rather than momentary actuation. The key operator adds a layer of security by restricting unauthorized operation.

Key Features

• 2-position maintained (MA) operation holds switch state after key is released
• Black key operator with chrome metal bezel for a durable, professional finish
• IP69K ingress protection rating — withstands high-pressure, high-temperature washdowns
• NEMA 4X and 13 rated for use in wet, corrosive, and dust-tight environments
• 22 mm panel cutout — compatible with standard 22 mm control station openings
• Screw clamp terminals for reliable, tool-assisted wire termination
• Shock-resistant and vibration-resistant construction

Compatibility

Designed for installation in 22 mm (0.87-inch) round panel openings, consistent with standard industrial control panel selector switch mounting configurations.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NFPA 70 (NEC) and applicable local codes. De-energize and lock out the control panel before mounting or wiring the switch. Screw clamp terminals require a small flathead screwdriver for wire termination. Verify that the panel cutout diameter is 22 mm and that the panel material and thickness are compatible with the switch bezel and mounting hardware before installation.