SCHNEIDER ELECTRIC XB4 BD21

Schneider Electric XB4 BD21 Selector Switch

Description

The Schneider Electric XB4 BD21 is a complete selector switch from the modular Harmony XB4 range. This robust unit features a chromium-plated metal bezel, ensuring durability in demanding industrial environments. It provides reliable manual control with a 2-position, stay-put mechanism. This complete assembly includes the selector switch head, a fixing collar, and a single normally open (NO) contact block (ZBE-101), making it ready for immediate installation in a standard 22mm panel cutout.

Specifications

• Manufacturer: Schneider Electric
• Type Number: XB4 BD21
• Series: Harmony XB4
• Mounting Diameter: 22 mm
• Operator Type: 2-position, stay-put
• Operator Profile: Black standard handle
• Bezel Material: Chromium plated metal
• Contacts Included: 1 x NO (Normally Open)
• Contact Block Model: ZBE-101
• Terminals: Screw clamp

Label Info

• Model: XB4 BD21
• EAN: 3389110887075

Application

Ideal for use in control panels for machinery, industrial automation, and building management systems to select operating modes or control specific functions.

Country of Origin

Made in France.

CO2 Impact

By purchasing this reused component, you are contributing to a circular economy and helping to avoid approximately 3.1 kg of CO2 emissions associated with the production of a new unit.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Can I add more contact blocks to the XB4 BD21?

Yes, the Harmony XB4 series is modular. You can stack additional ZBE series contact blocks (e.g., ZBE-102 for NC) onto the ZB4BZ009 body. Typically, you can mount up to three blocks in total.

What is the IP rating of this selector switch when properly installed in a panel?

The XB4 BD21 selector switch head has an IP66, IP67, IP69, and IP69K rating, meaning it is protected against high-pressure water jets, dust, and temporary immersion. This makes it suitable for harsh industrial environments.

Is the ZBE-101 contact block a screw clamp or spring terminal type?

The standard ZBE-101 contact block included with the XB4 BD21 uses screw clamp terminals for secure and reliable wire connections.

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Last Update: Friday, March 13, 2026