800F-A4A2
Active22mm Red Flush Push Button 1NC
Allen-Bradley 800F series red flush momentary push button with 1NC contact block.
Common Applications
Standard stop button on Allen-Bradley panels. Pairs with 800F-A3A1 green start. Red color and 1NC contact follow NFPA 79.
Commonly Found On
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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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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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 Closed — circuit is on until you press. Standard for stop/emergency functions. Wire in series with safety circuits.
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1NC
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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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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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Material
The bezel/body material. Metal bezels are more durable in harsh environments. Plastic is lighter and cheaper.
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Plastic with chrome bezel
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Mounting Type
How the button attaches to the panel. Panel mount is standard — installs through a cutout from the front.
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Panel
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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
$23.78 — $40.36
across 2 distributors
Quick Specs
- Actuator Function
- Momentary
- Actuator Type
- Flush
- Certifications
- UL, CSA, CE
- Color
- Red
- Contact Configuration
- 1NC
What People Are Saying
“Hundreds of these across our plants. Not a single failure in 10 years that wasnt caused by physical damage. The integrated contact block means fewer parts to assemble.”