Siemens Keylock Switch Body (22mm, 3SU1 Series)
Key-Operated Switch A6X30139632 vs. Comparable 22mm Configurable Bodies
| Spec | A6X30139632 | A6X30139642 | A6X30139691 | A6X30139680 |
|---|---|---|---|---|
| Actuator | Keylock | Keylock | Pushbutton, Round | Pushbutton, Round |
| Illumination | Non-Illuminated | Non-Illuminated | Illuminated | Illuminated |
| Requires | Contact Block(s) | Contact Block(s) | Contact Block(s), Illumination Source | Contact Block(s), Illumination Source |
| Series | 3SU1 | 3SU1 | 3SU1 | 3SU1 |
| Cutout | 22.3mm Round | 22.3mm Round | 22.3mm Round | 22.3mm Round |
| Compatible | Siemens 22mm | Siemens 22mm | Siemens 22mm | Siemens 22mm |
| Similarity | — | 0.928 | 0.916 | 0.916 |
All listed parts use the 22.3mm round panel cutout and share the Siemens 3SU1 modular platform. Qualified alternates must be evaluated against the target application's mechanical envelope and access-clearance requirements.
- A6X30139642 shares the keylock actuator type and non-illuminated design; differs only in the O.M.R. (Off–Manual–Reset) function coding versus the O-I (Off–Instantaneous) position scheme implied by this seed.
- A6X30139691 and A6X30139680 are round pushbutton operators; they require an illumination source in addition to contact blocks, adding wiring and sourcing complexity for lamp or LED modules.
Installation Notes for 3SU1 Keylock Bodies
The A6X30139632 ships as a bare operator body; panel assembly requires a separate contact block (3SU1..0-1..20-0AA0 or equivalent) and compatible fixing collar. The 22.3mm round cutout accommodates standard Siemens 22mm bezel hardware. Key-operated switches in this series support front-panel lockout functions; verify that the selected key-removal position aligns with the machine safety-interlock sequence.
Engineering Verification Checklist
- Confirm key-removal position matches operational requirements (O-I position sequence)
- Verify contact block rating matches circuit voltage and current demands
- Check panel bezel and sealing compatibility for the target enclosure ingress rating
- Confirm keyway orientation allows ergonomic operator reach in the assembled panel layout
- Validate that the 22.3mm cutout matches current panel tooling or decide on modification
- Review RoHS3 compliance documentation if export or environmental compliance is required
- Confirm illumination source is not needed (non-illuminated body has no lamp socket)
- Cross-reference the O-M-R variant if momentary-return key travel is required for the function
- Ensure spare key inventory or keyway standardization across the equipment family