Schneider Electric Harmony XB4 3-position Key Switch Head, Latching, 22mm Cutout

This Harmony XB4, black head with key (key no.421E) for key selector switch has 3 positions, operates with stay-put mechanism with key withdrawal on left, center and right position. This head with key provides a versatile interface for controlling your machines. It is easily installed and replaced on compatible complete key selector switch units to provide a secure manner for authorized staff to switch between process or machine operating modes. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66. It has a metal bezel, this makes it Ideal for applications requiring high impact and vibration resistance. It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery. Secure machine and system operation with a key, only available to authorized operators. Its wide range of operating temperatures from -40°C to 70°C allows versatility in usage of product.

• Latching key switch provides secure position stability
• IP66, IP67, and IP69K ratings ensure protection against moisture
• High mechanical life of 1,000,000 cycles maximises longevity
• Black operator profile promotes visibility and usability
• Key withdrawal possible in any position enhances flexibility
• Green certified to support environmental responsibility

• Used in industrial machinery for secure control
• Ideal for harsh weather conditions in outdoor settings
• Applied in control panels for enhanced operator safety
• Utilised in automotive applications requiring robust locking mechanisms

Yes, the compact design allows for installation in limited areas.

It operates effectively in temperatures ranging from -40°C to +70°C.

Yes, it withstands high-pressure conditions up to 7,000,000Pa at 55°C.

Yes, the key can be withdrawn regardless of switch position.

It uses a 421E key for locking and unlocking functions.