ZB4-BW333-230
ActiveSchneider ZB4BW333 Green Flush Illuminated Pushbutton Head (Harmony XB4, head-only)
Schneider XB4 illuminated green for 230V circuits.
Common Applications
For European panels with direct mains-voltage indicators. Same button, different LED voltage module. Verify voltage before installing.
Research Notes
1. Overview
The Schneider Electric ZB4BW333 is a 22 mm metal green flush illuminated pushbutton head for the Harmony XB4 / ZB4 system — a spring-return (momentary), flush, illuminated operator head. As a ZB4 part it is the head only: to build a working illuminated button you add a separate ZBV LED module (voltage-specific) and a ZB4 contact block, mounted on the body (the complete factory unit is XB4-BW333 + LED). (Data-quality note: this was cataloged as "230 V AC" (PN "ZB4-BW333-230") — but the head is voltage-independent; the LED voltage is set by the separate ZBV module you fit (e.g. ZBV-M3 = 230 V green, ZBV-G3 = 120 V, ZBV-B3/B1 = 24 V). The "-230" suffix is bogus and the 230 V is not inherent to ZB4BW333.)
2. User Sentiment
Harmony XB4 metal illuminated heads are standard, robust industrial operators. The key practical point (and this entry's error) is the modular design: the ZB4-BW head, the ZBV LED module (choose the voltage/color), and the contact block are ordered separately — the head alone doesn't light or switch.
3. Real-World Applications
An illuminated green (start/run/on) flush pushbutton on machine and control panels — the integral LED (once a ZBV module is fitted at the correct voltage) shows energized/active state; a contact block drives a contactor/PLC input.
4. Technical Specifications
- Type: Harmony XB4/ZB4 metal illuminated pushbutton head (head-only), 22 mm
- Actuator: flush, momentary (spring-return); green; illuminated (LED module separate)
- LED voltage: not inherent to the head — set by the separate ZBV LED module (24 / 120 / 230 V options)
- Contacts: none integral — add a ZB4 contact block
- Cutout: 22 mm; metal (chrome) bezel; IP66
- Approvals: UL, CSA, CE
- Complete unit: XB4-BW333 (+ LED module + contacts)
5. Ordering & Compatibility
Order the ZB4BW333 head plus a ZBV LED module (pick the voltage — e.g. ZBV-M3 = 230 V green, ZBV-G3 = 120 V green, ZBV-B3 = 24 V green) and a ZB4 contact block — or the complete XB4-BW333. Fits 22 mm cutouts, XB4/XB5 system. BW = illuminated flush; color digit selects green.
6. Known Issues / DQ
- DQ: the head is voltage-independent — "230 V" is not inherent to ZB4BW333 (the "-230" suffix is bogus); voltage is set by the separate ZBV LED module. Corrected here. It's also a head (no integral LED/contact).
- Practical care: order head + correct-voltage ZBV LED module + contact block; confirm the 22 mm cutout.
Specifications
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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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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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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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22mm
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Device type
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ZB4-BW illuminated pushbutton HEAD (green flush); LED module + contact separate; complete = XB4-BW333
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Illumination
Whether the button has a built-in light. Illuminated buttons show status (lit = active).
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Illuminated
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IP Rating
IP66: Dust-tight and withstands powerful water jets from any direction. Standard for outdoor and washdown applications.
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IP66
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LED Voltage
The voltage required for the built-in LED. Must match your control circuit voltage (typically 24V DC or 230V AC).
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Not inherent to head — set by separate ZBV LED module (24/120/230V options)
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Material
The bezel/body material. Metal bezels are more durable in harsh environments. Plastic is lighter and cheaper.
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Metal
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Pn note
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ZB4BW333 = green flush illuminated HEAD (se.com). Voltage-independent — the -230/230V is bogus; LED voltage is set by the separate ZBV module (ZBV-M3=230V, ZBV-G3=120V, ZBV-B3=24V green). Head-only (LED+contact separate).
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Pn status
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voltage/suffix-corrected + head-only
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Installation Quick Reference
Panel cutout: 22mm. 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
$27.62 — $28.98
across 2 distributors
Quick Specs
- Certifications
- UL, CSA, CE
- Color
- Green
- Contact Configuration
- None integral (head-only)
- Cutout Diameter
- 22mm
- Device type
- ZB4-BW illuminated pushbutton HEAD (green flush); LED module + contact separate; complete = XB4-BW333
What People Are Saying
“For European panels with direct mains-voltage indicators. Same button, different LED voltage module. Verify voltage before installing.”
