Emergency stop
Emergency-stop push button · latching: pressing it locks the NC contact open until you twist to release · 1 NC (11–12) + 1 NO (23–24) · 10 A · released · click to press, click again to twist-release

Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: 22 mm emergency-stop push button
Pins
- 11 (NC)
- 12 (NC)
- 23 (NO)
- 24 (NO)
Ratings and limits
| Rating | 10 A |
|---|---|
| Action | push to latch, twist to release |
How to use it
Always wired through its NC contact in series with the contactor coil or control supply: if a wire breaks the machine stops. It must cut power directly, not ask a microcontroller to.