Switch Bezels / Switch Caps RED CAP FOR JB ILLUMINATED
Research Notes
1. What this is
AT4135C is an NKK AT-series actuator cap / button accessory (interchangeable cap for NKK pushbutton switch bodies).
2. Part-number decode
- Product line: NKK AT
- Type: actuator/cap accessory
3. Compatibility & ordering
NKK Switches makes high-quality toggle, rocker, pushbutton, tactile, and programmable SmartSwitch products for panel and PCB mounting. Match by type (toggle/rocker/pushbutton/programmable), actuation (momentary vs alternate), illumination, mounting, and the electrical rating, then use the NKK datasheet to confirm the exact contact form and termination encoded in the part number.
4. Data-quality note
The NKK product line and switch type are decoded from the part number (grounded in NKK's product catalog and DigiKey listings). The exact contact form, termination, and cap colour are encoded in the full order code — confirm against the NKK datasheet for a precise order (not guessed here).
5. Sources
- NKK Switches product catalog (nkkswitches.com)
- Distributor listing (DigiKey / Mouser) — search the exact part number
1 source
- NKK Switches — AT4135C — nkkswitches.com
Specyfikacje
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Device class
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actuator/cap accessory
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Enriched by
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nkk-decoder-2026-08-12
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Lead time
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13 Days
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Manufacturer series
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AT
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Mouser part number
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633-AT4135C
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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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NKK AT-series actuator cap / button accessory (interchangeable cap for NKK pushbutton switch bodies)
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Skrócona Instrukcja Montażu
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.
Wymiary
Rozwiązywanie Problemów
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.
Skrócone Specyfikacje
- Device class
- actuator/cap accessory
- Enriched by
- nkk-decoder-2026-08-12
- Lead time
- 13 Days
- Manufacturer series
- AT
- Mouser part number
- 633-AT4135C
Dowiedz się Więcej
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Przewodnik 22mm vs 30mm
Jakiego rozmiaru otworu montażowego potrzebujesz?
Bloki Styków: NO vs NC
Jak wybrać i podłączyć bloki styków
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Znajdź właściwy przycisk wg typu, rozmiaru i koloru
