Flat momentary push-button head with automatic reset, LED BA9a, white plastic Harmony XB5 ZB5AW31

Push button head for control and signaling

This flat push button head with self-reset function, equipped with a BA9a LED, is part of the Harmony XB5 series from Schneider Electric. It provides reliable and intuitive control in industrial applications. It is a versatile interface, easy to install and replace, ideal for complete button units and contact blocks.

Design and application

The push button head is designed for durability and resistance to harsh working conditions. Made of high-quality plastic, it is characterized by high resistance to impact, dust, water and vibration – confirmed by IP66 certification. The mounting hole diameter is 22.5 mm. The white color of the button ensures good visibility, and the round shape of the lens makes it easier to identify. Thanks to the possibility of illumination with a BA9a LED, the push button head can also function as a signaling device.

Advantages and benefits

• Durability and reliability: Resistant to mechanical damage, dust, water and vibration (IP66), ensuring long-term operation even in demanding industrial conditions.
• Easy installation and replacement: Modular design allows for quick snap-in mounting and simple replacement in case of failure or need for installation modification.
• Intuitive operation: Clear color and the possibility of illumination improve visibility and minimize operator errors.
• Versatility: Compatible with a wide range of complete button units and contact blocks from the Harmony XB5 series.
• Wide customization: Availability of different colors, symbols and identification plates allows adaptation to specific application needs (although this particular version is white).
• Compliance with standards: The Harmony XB5 series meets the requirements of many IEC, UL, CSA and CE standards, ensuring safety of use.
• Cost savings: Universal LEDs reduce the number of variants and simplify the storage of spare parts.

The Harmony XB5 series offers a wide selection of accessories to adapt to individual application needs – from ergonomic emergency stop designs to illuminated types that increase operator efficiency by reducing production downtime. Various types of connections are available: screw terminal, connector, Faston connector, push-in terminal or printed circuit board, which further increases installation flexibility.