Schneider Electric XB5AA42 Harmony XB5 Push Button Plastic Red Flush 22 mm Unmarked 1NC Push Button

The Schneider Electric XB5AA42 is a Harmony XB5 plastic push button with a red flush head 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

IEC 60073 reserves red for a stop command, and the normally-closed contact matches that function: the circuit it feeds stays made until the button is pressed, so a broken wire or a disconnected head fails safe by opening the circuit. The positive-opening mechanism conforming to IEC 60947-5-1 Appendix K guarantees the NC contact separates mechanically even if the contacts have welded, which matters for any stop or interlock duty. Choose the unmarked head where the stop function is already obvious from red colour and station position; use the marked XB5AA4322 head where the legend needs to be explicit.