Yellow front-plate protective collar for compatible 22 mm SIRIUS 3SB3 mushroom pushbuttons.
Siemens 3SB3921-0AK is a yellow protective collar from the SIRIUS 3SB3 commanding and signaling accessory range. It is intended for front-plate mounting around a compatible mushroom pushbutton without a key-operated switch. Siemens describes it as an accessory or spare part for the plastic and metal round 22 mm program. The official configuration manual states that the collar can be used with front panels up to 4 mm thick. Siemens identifies the product as phased out and lists SIRIUS ACT 3SU1, with preferred successor 3SU1900-0DY30-0AA0. Verify the exact actuator type, mounting plate and guard geometry before ordering.
| Item | Status |
|---|---|
| Product condition | Original new |
| Availability | In stock |
| Official lifecycle | End Prod.Lifecycl. |
| Successor listed by Siemens | 3SU1900-0DY30-0AA0 |
| Warranty | With 1 year warranty |
| Shipping | Worldwide shipping available |
Condition, availability and warranty are Stockoems commercial information and are not manufacturer commitments.
| Parameter | Verified value |
|---|---|
| Manufacturer | Siemens |
| Complete part number | 3SB3921-0AK |
| Product type | Protective collar for mushroom pushbutton |
| Series | SIRIUS 3SB3 |
| Program size | Round 22 mm |
| Color | Yellow |
| Mounting | Front plate |
| Compatible actuator | Mushroom pushbutton without key-operated switch |
| Maximum front-panel thickness | 4 mm |
| Official lifecycle | End Prod.Lifecycl. |
| Preferred successor | 3SU1900-0DY30-0AA0 |
For receiving inspection, compare the complete order code, yellow collar, circular guard geometry and front-plate mounting features with the purchase requirement. Request clear overall and label photographs before shipment when traceability is required.
Match the complete part number 3SB3921-0AK, yellow finish, 22 mm SIRIUS 3SB3 program and compatibility with a mushroom pushbutton without key-operated switch. Confirm the installed actuator, panel thickness and front-plate geometry. The preferred 3SU1 successor requires a separate mechanical compatibility review.
Siemens marks 3SB3921-0AK as End Prod.Lifecycl. and identifies SIRIUS ACT 3SU1 as the successor range, with preferred successor 3SU1900-0DY30-0AA0.
It is a yellow protective collar for a compatible SIRIUS 3SB3 mushroom pushbutton.
It belongs to the plastic and metal round 22 mm program and mounts on the front plate.
No. Siemens specifies use with a mushroom pushbutton without a key-operated switch.
The official configuration manual states a maximum front-panel thickness of 4 mm.
Siemens marks it as End Prod.Lifecycl. and lists 3SU1900-0DY30-0AA0 as the preferred successor.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Email: sales6@apterpower.com | WhatsApp: +86 18159889985
Structured verification, documentation, packaging and after-sales coordination for 3SB3921-0AK procurement.
| Stage | Service check | Purpose |
|---|---|---|
| 1 | Model and suffix verification | The complete part number and all suffix characters are matched to the purchase request. |
| 2 | Condition confirmation | Condition and packaging expectations are documented before shipment. |
| 3 | Technical compatibility review | Device family, front-plate mounting, collar geometry and compatible actuator are reviewed. |
| 4 | Product and label photo confirmation | Overall and label images support traceability and receiving inspection. |
| 5 | Protective packaging | Collar surfaces and front-plate mounting features are protected from impact and contamination. |
| 6 | Worldwide shipping | Carrier options are coordinated for the destination and order requirements. |
| 7 | Shipment tracking | Tracking details are communicated after dispatch. |
| 8 | Customs documentation | Commercial and shipping documents are prepared for the agreed transaction. |
| 9 | Written warranty terms | Stockoems warranty scope is stated in writing. |
| 10 | Return authorization process | Return requests are reviewed against documented authorization conditions. |
| 11 | After-sales response | A defined contact route supports post-delivery communication. |
Request the exact manufacturer and part number, clear overall and label photographs, a written condition statement, warranty terms and a traceable company contact. Compare all evidence with the installed equipment and purchase specification.
Verify the legal company identity, quotation consistency, bank-account ownership, documented stock evidence, packaging scope, shipping terms, return authorization process and after-sales contact route.
Engineers should review the complete suffix, 22 mm program, actuator type, front-plate thickness, collar geometry, mounting requirements and successor impact. Similar appearance is not proof of compatibility.
Common warning signs include incomplete model information, reused or unclear photos, contradictory specifications, refusal to provide label evidence, unrealistic availability claims, payment pressure, vague warranty language and no documented return process.
Send the complete part number, quantity, destination and available label photographs for model, condition, compatibility, packaging and shipping review.
Email: sales6@apterpower.com | WhatsApp: +86 18159889985
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Email: sales6@apterpower.com | WhatsApp: +86 18159889985
