XCS-0B4
ActiveKillark 22mm ATEX Push Button Station
Hubbell Killark explosion-proof push button control station.
Common Applications
American-made explosion-proof push button for Class I Div 1 / ATEX Zone 1 hazardous locations. Cast aluminum enclosure with copper-free construction for hydrogen environments. Hubbell Killark is the American standard for explosion-proof controls — specified on US oil refineries, chemical plants, and gas processing facilities. The American equivalent of Pepperl+Fuchs in Europe.
Specifications
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ATEX Zone
The hazardous area classification. Zone 1 = gas likely present. Zone 2 = gas unlikely. Zone 21/22 = combustible dust.
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Zone 1, Class I Div 1
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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, cUL, ATEX, IECEx
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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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IP Rating
Ingress Protection rating — first digit is dust (0-6), second is water (0-9). Higher is better.
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NEMA 7/9
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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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Cast aluminum
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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
$20.14 — $118.34
across 2 distributors
Quick Specs
- ATEX Zone
- Zone 1, Class I Div 1
- Certifications
- UL, cUL, ATEX, IECEx
- Contact Configuration
- 1NO
- IP Rating
- NEMA 7/9
- Material
- Cast aluminum
What People Are Saying
“American-made explosion-proof push button for Class I Div 1 / ATEX Zone 1 hazardous locations. Cast aluminum enclosure with copper-free construction for hydrogen environments. Hubbell Killark is the A”