Pushbutton Switches SPDT Momentary Lighted 2 Lamps
Research Notes
1. What this is
AML21GBA2AA is a Honeywell AML pushbutton/indicator.
2. Part-number decode
- Series: Honeywell AML
- Type: pushbutton/indicator
3. Compatibility & ordering
Honeywell (incl. MICRO SWITCH) makes AML pushbuttons/indicators and snap-action/basic switches. Match by type, actuation, illumination, sealing, and mounting, then use the manufacturer datasheet to confirm the exact contact and termination encoded in the part number.
4. Data-quality note
The Honeywell series and switch type are decoded from the part number (grounded in the manufacturer catalog and distributor listings). The exact contact arrangement, termination, and cap/colour are encoded in the full order code — confirm against the datasheet for a precise order (not guessed here).
5. Sources
- Honeywell product catalog (sps.honeywell.com)
- Distributor listing (DigiKey / Mouser) — search the exact part number
1 source
- Honeywell — AML21GBA2AA — sps.honeywell.com
规格参数
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Device class
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pushbutton/indicator
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Enriched by
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honeywell-decoder-2026-08-12
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Lead time
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231 Days
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Manufacturer series
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AML
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Mouser part number
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785-AML21GBA2AA
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Pn status
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decoded
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Rohs status
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RoHS Compliant
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Series description
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Honeywell AML-series pushbutton / indicator (panel-mount lighted/non-lighted pushbutton, rocker, and indicator range)
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安装快速参考
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.
尺寸
故障排除
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.
快速规格
- Device class
- pushbutton/indicator
- Enriched by
- honeywell-decoder-2026-08-12
- Lead time
- 231 Days
- Manufacturer series
- AML
- Mouser part number
- 785-AML21GBA2AA
