Schneider Electric XB5AG21 Key Selector Switch, 2-Position, Maintained, 1 NO Contact

The Schneider Electric XB5AG21 is a professional-grade 2-position key-operated selector switch engineered for secure industrial control applications. As part of the Harmony XB5 series, this device is designed for integration into standard 22mm diameter mounting holes, making it a versatile solution for control panels and machinery interfaces. The switch features a maintained action, meaning it stays in the selected position until manually changed, and includes one normally open (NO) contact for reliable electrical switching.

Advantages

This key selector switch offers a high level of security by ensuring that only authorized personnel with the correct key can operate the connected equipment. Its robust construction is designed to withstand harsh industrial environments, providing long-term durability and consistent performance. The modular design of the Harmony XB5 series allows for straightforward installation and maintenance, while the ergonomic interface ensures ease of use for operators in demanding settings.

Suitable for

• Industrial machinery control panels
• Secure access management for electrical equipment
• Process automation systems
• Safety-critical switching operations

This switch may not be suitable for applications requiring momentary (spring-return) functionality, as it is specifically designed for maintained positions. It is also not intended for outdoor environments without appropriate protective enclosures to prevent ingress of dust or moisture beyond its rated protection class.

Key specifications

• Switch type: 2-position key selector
• Operation: Maintained
• Contact configuration: 1 NO (Normally Open)
• Mounting diameter: 22 mm
• Series: Harmony XB5

To use the switch, insert the provided key into the cylinder and rotate it to the desired position to engage the contact. The switch will remain in this state until the key is turned back to the original position. Ensure that the electrical connections are properly wired to the NO contact block according to your system schematic.

What to consider before purchase

• Verify that the 22mm mounting hole size is compatible with your existing control panel.
• Confirm that a maintained action is appropriate for your specific control logic.
• Ensure the 1 NO contact configuration meets the requirements of your electrical circuit.

Usage recommendations

Regularly inspect the key cylinder for debris and ensure the switch mechanism operates smoothly. Keep spare keys in a secure location to prevent unauthorized access or loss of operational capability.