Eaton · M22 Series

M22-D-K

Active
UL CSA CE

22mm Black Flush Push Button M22

Part number: M22 - D
Eaton M22 Series Introduced circa 2000

Eaton M22 black flush push button.

Common Applications

Black for auxiliary non-safety functions. Counter reset, horn silence, lamp test. Keeps color-coded buttons distinct for safety-critical functions.

Specifications

Actuator Type
Flush
Certifications
UL, CSA, CE
Color
Black
Cutout Diameter
22.5mm
IP Rating
IP67 (front)
Series
M22

Installation Quick Reference

Panel cutout: 22.5mm. Insert from the front of the panel, secure with mounting nut from behind (tighten to 2-3 Nm).

Contact block: Snap or screw the contact block onto the rear of the button body. Ensure the contact block orientation matches the wiring diagram — NO terminals are usually marked.

Wiring: Use 0.5-2.5mm² stranded wire with ferrules. Tighten screw terminals to 0.8 Nm. Test the button function before energizing the circuit.

Dimensions

Front 22.5mm cutout panel hole diameter Side panel contact ~45mm depth

Troubleshooting

Button doesn't respond when pressed

Check the contact block first — it's the most common failure point. Test continuity across the NO or NC terminals with a multimeter. If no click is felt, the return spring in the head may be broken.

Works intermittently

Contact block contacts are pitted or burned. Replace the contact block — don't try to file the contacts. Check if the rated cycle count has been exceeded.

Button feels mushy or doesn't click

The spring return mechanism in the button head is worn. Replace the head. The contact block can usually be reused if it tests OK.

Where to Buy

Price range

$0.61 — $31.08

across 2 distributors

Quick Specs

Actuator Type
Flush
Certifications
UL, CSA, CE
Color
Black
Cutout Diameter
22.5mm
IP Rating
IP67 (front)

What People Are Saying

+

“Black for auxiliary non-safety functions. Counter reset, horn silence, lamp test. Keeps color-coded buttons distinct for safety-critical functions.”

Reddit r/PLC 25 upvotes View thread →