Schneider Electric XB5AA4322 Harmony XB5 Push Button Plastic Red Flush 22 mm Marked O 1NC Push Button

The Schneider Electric XB5AA4322 is a Harmony XB5 plastic push button with a red flush head marked with the letter O, and a single normally-closed (1NC) contact rated 10 A Ith. It mounts in a standard 22.5 mm panel cut-out, uses screw-clamp terminals for 0.22-2.5 mm² conductors, and is sealed to IP66/IP67/IP69/IP69K.

Technical Specifications

Certifications & Standards

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

Selection Notes

The 'O' legend is the IEC 60417 symbol for off, reinforcing the red stop function already indicated by the normally-closed contact and the bezel colour. The positive-opening mechanism conforming to IEC 60947-5-1 Appendix K forces the NC contact to separate mechanically even if the contacts have welded, a property any stop or interlock circuit relies on. Prefer this marked head over the plain XB5AA42 where the control scheme or local regulation calls for an explicit off symbol rather than colour coding alone.