XB6EA31B
Active16mm Green Push Button XB6 1NO
Schneider Harmony XB6 16mm compact push button.
Common Applications
The smallest Schneider industrial button. 16mm cutout for space-constrained panels. Same Harmony quality in a compact package. Used on small instrument panels, DIN rail devices, and compact control stations.
Research Notes
1. Overview
The Schneider Electric XB6EA31B is a 16 mm green flush pushbutton from the Harmony XB6E economy line — a monolithic (one-piece) complete pushbutton that integrates the actuator, body, and contact into a single non-modular unit. It's momentary (spring-return) with a 1 NO contact, IP65-rated, CE-marked. The XB6 line is Schneider's compact/economy 16 mm range, aimed at space-constrained panels and cost-sensitive designs where the full modular Harmony XB4/XB5 (22 mm) is more than needed.
2. User Sentiment
Valued for being small and inexpensive — the 16 mm size fits dense panels and the monolithic design is quick to fit (no separate contact block to assemble). The trade-off versus modular XB4/XB5 is exactly that: it's one-piece, so you can't swap contact blocks or reconfigure it — you replace the whole button. Fine for simple, fixed functions; less flexible for complex control builds.
3. Real-World Applications
Compact control panels, small machines, and instrument/equipment fronts needing a simple green (start/on) momentary button in a 16 mm cutout — where board space or cost rules out 22 mm modular devices.
4. Technical Specifications
- Type: Harmony XB6E complete monolithic pushbutton, 16 mm
- Actuator: flush, momentary (spring-return); green
- Contacts: 1 NO (integrated, non-modular)
- Cutout: 16 mm
- Sealing: IP65
- Approvals: CE
5. Ordering & Compatibility
Fits 16 mm panel cutouts (not 22 mm). As a monolithic unit the contact is fixed (1 NO here) — choose the exact catalog number for the color/contact you need rather than swapping blocks. Part of the Harmony XB6 economy family (other colors/functions available); step up to XB4 (metal) / XB5 (plastic) 22 mm for modular, reconfigurable devices.
6. Known Issues
No notable reliability issues. Practical care: it's 16 mm (confirm the smaller cutout) and monolithic/non-modular (the 1 NO contact is fixed — you can't add/change contact blocks; replace the whole unit), so pick the right variant up front. For heavy-duty or reconfigurable needs, use the 22 mm modular Harmony ranges.
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 (spring-return)
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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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Flush
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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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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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Green
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Contact Configuration
Normally Open — circuit is off until you press. Standard for start/go/enable functions.
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1NO
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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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16mm
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IP Rating
IP65: Dust-tight and protected against low-pressure water jets. Suitable for indoor industrial and light washdown.
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IP65
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Series
The manufacturer's product family. Products in the same series share mounting systems and accessories.
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Harmony XB6E (16mm economy, monolithic/non-modular)
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Installation Quick Reference
Panel cutout: 16mm. 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
$130.81 — $144.47
across 2 distributors
Quick Specs
- Actuator Function
- Momentary (spring-return)
- Actuator Type
- Flush
- Certifications
- CE
- Color
- Green
- Contact Configuration
- 1NO
What People Are Saying
“The smallest Schneider industrial button. 16mm cutout for space-constrained panels. Same Harmony quality in a compact package. Used on small instrument panels, DIN rail devices, and compact control st”
