Schneider Electric XB5AC21 Harmony XB5 Push Button Plastic Black Mushroom 40 mm Spring Return 1NO Push Button

The Schneider Electric XB5AC21 is a Harmony XB5 plastic push button with a 40 mm black mushroom head, spring return (non-latching), and a single normally-open (1NO) contact rated 10 A Ith. It mounts in a standard 22 mm panel cut-out, uses screw-clamp or Faston terminals, and is sealed to IP65/IP69/IP69K.

Technical Specifications

Certifications & Standards

• DNV
• CSA
• UL Listed
• Lloyd's Register
• BV
• IEC 60947-5-1
• IEC 60947-1

Selection Notes

The 40 mm mushroom head gives a far larger strike target than the standard 22 mm flush or projecting operators, which suits a hand or palm actuation where the operator cannot look at the panel or is wearing gloves. Because this version is spring return rather than latching, it is a palm-strike start/confirm button, not a stop device: specify a latching, trigger-release mushroom head instead if the function needs to stay engaged until manually reset. The single 1NO contact wires directly into a PLC input within its 3 A/240 V AC-15 rating.