M22-DP-R
Active22mm Red Mushroom Momentary Button M22
Eaton M22 red mushroom momentary push button.
Common Applications
Non-latching red mushroom for cycle stop applications. Springs back when released — machine can restart immediately. For Eaton panels. Not an e-stop.
Research Notes
1. Overview
The Eaton M22-DP-R is a red mushroom-head actuator for the M22 / RMQ-Titan 22.5 mm system — momentary (non-latching), non-illuminated. As an M22 actuator it is a head/operator only: it fits an M22 fixing adapter/body and needs a separate M22 contact block (K10/K01, etc.) to function. It's the momentary counterpart to the maintained mushroom (Eaton's latching push-pull mushrooms use different codes, e.g. M22-PV for E-STOP). Front sealing IP67.
2. User Sentiment
Standard, robust RMQ-Titan hardware. The important practical point is that it's modular/head-only — order the actuator plus the matching contact block(s) and fixing adapter. A momentary red mushroom gives a large, easy-to-hit non-latching press; it is not an emergency stop (an e-stop latches — use M22-PV/PVT for that).
3. Real-World Applications
A large red momentary mushroom for a prominent press that returns when released (jog/hold, momentary stop, or a big-target function button). For a latching E-STOP, use a proper push-pull/twist mushroom (M22-PV…), not this momentary actuator.
4. Technical Specifications
- Type: M22/RMQ-Titan mushroom actuator (head-only), non-illuminated
- Actuator: red mushroom, momentary (non-latching)
- Cutout: 22.5 mm
- Contacts: none integral — add M22 contact block(s)
- Sealing: IP67 (front); IP69K typical on M22
- Approvals: UL, CSA, CE
5. Ordering & Compatibility
Order the M22-DP-R actuator plus an M22 fixing adapter and contact block(s) (e.g. M22-K01 for a stop-type NC). Fits 22.5 mm cutouts, M22 system. Note the maintained mushroom variant is a different catalog number, and a latching E-STOP mushroom (M22-PV…) is different again.
6. Known Issues
No notable reliability issues — mainstream M22 hardware. Practical care: it's a head/actuator only (add contacts + adapter), it's momentary (not a latching E-STOP — don't substitute for safety-stop duty), and confirm the 22.5 mm cutout and required contact configuration.
2 sources
Specifications
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Actuator Function
Momentary = springs back when released. Maintained/latching = stays pressed until pressed again.
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Momentary
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Actuator Type
The button head style. Flush sits level with the bezel (prevents accidental presses). Extended protrudes for easy access.
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Mushroom 40mm
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Certifications
Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.
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UL, CSA, CE
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Color
Button/actuator color. Green = start/go, Red = stop/emergency, Yellow = caution, Blue = reset (per IEC 60204-1).
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Red
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Contact Configuration
Normally Open — circuit is off until you press. Standard for start/go/enable functions.
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None integral (head-only)
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Cutout Diameter
The hole size you drill in your panel to mount this button. 22mm is the most common industrial standard worldwide.
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22.5mm
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Device type
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M22 mushroom ACTUATOR (head-only, non-illuminated); add contact block + adapter
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IP Rating
IP67: Dust-tight and survives temporary water submersion (1m for 30 min). Handles oil splashes, steam cleaning, and rain.
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IP67 (front)
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Note
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Momentary/non-latching mushroom — NOT an e-stop (e-stop = latching M22-PV/PVT)
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Series
The manufacturer's product family. Products in the same series share mounting systems and accessories.
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M22
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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
Wiring Diagram
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
$20.98 — $148.19
across 3 distributors
Quick Specs
- Actuator Function
- Momentary
- Actuator Type
- Mushroom 40mm
- Certifications
- UL, CSA, CE
- Color
- Red
- Contact Configuration
- None integral (head-only)
What People Are Saying
“Non-latching red mushroom for cycle stop applications. Springs back when released — machine can restart immediately. For Eaton panels. Not an e-stop.”