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S1901 19 mm Flat metal key Switch, 1NO + 1NC
Choose the specified configuration and pack quantity. The complete sales unit and mounting dimensions and terminal layout are listed below.
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Ships from China · 5–7 calendar days preparation. Shipping · Returns

Panel-mount keyed control
1NO + 1NC contact configuration. Compare the panel opening, key form and switch contacts before ordering.
Model and reference dimensions
| Shipping reference | S1901-2801-Y1O1C-MT |
|---|---|
| Model series | S1901 |
| Nominal panel opening | Ø19 mm |
| Reference across flats | 16 mm |
| Reference length | 32.7 mm |
| Key form | Flat metal key |
| Contact identification | 1NO + 1NC |
| Sales unit | 1 switch with retaining nut and 2 matching keys |
Dimensions are original supplier references.


Match and check
Isolate the circuit. Secure the retaining nut and verify continuity and key removal with the equipment disconnected.
Build your order, pack by pack.
Ships from China · 5–7 calendar days preparation.
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Find your matching configuration
Panel Key Switches
Compare the available configurations in this family. Match the mechanism, connection sizes and complete sales unit before ordering.
Tubular Key (2)


Flat Key (6)







