Siemens 21F thyristor gate unit for 8 kV drive equipment
Siemens 6SL3955-0TX00-1AA0 is identified in the Siemens product portal as a 21F thyristor gate unit for 8 kV equipment. The official description specifies electronic over-voltage protection in the documented 3.6 kV to 7 kV range. This order number belongs to an older drive-electronics platform and should be matched by complete suffix rather than by appearance or family name alone. Procurement review should include the product label, installed voltage class, protection version, connector arrangement, hardware and software markings, cabinet position and surrounding power-conversion configuration before maintenance replacement or spare-part approval.
| Item | Details |
|---|---|
| Product Condition | Original new |
| Availability | In stock |
| Official Lifecycle | End Prod.Lifecycl. |
| Warranty | With 1 year warranty |
| Shipping | Worldwide shipping options available |
Condition, availability and warranty are Stockoems commercial information, not manufacturer commitments.
| Parameter | Verified Detail |
|---|---|
| Manufacturer | Siemens |
| Complete Part Number | 6SL3955-0TX00-1AA0 |
| Product Type | Thyristor Gate Unit 21F |
| Voltage Class | 8 kV |
| Protection Description | Electronic over-voltage protection; documented 3.6 kV to 7 kV range |
| Successor Product | 6SL3958-0TX01-0AA0 |
| Net Weight | 0.35 kg |
| Country of Origin | Germany |
| Review Area | Application Guidance |
|---|---|
| System Context | Older Siemens high-voltage drive power-conversion equipment |
| Functional Role | Provides gate-control electronics for the associated thyristor stage |
| Typical Use | Maintenance spares for the documented 21F gate-unit configuration |
| Configuration Review | Confirm voltage class, protection version, connectors and revision markings |
| Replacement Review | Compare the installed unit and Siemens successor data before approval |
Compatibility must be evaluated against the installed system configuration. This product should not be treated as a guaranteed direct replacement solely because another item has a similar designation.
The Siemens product portal states End Prod.Lifecycl. for 6SL3955-0TX00-1AA0 and identifies 6SL3958-0TX01-0AA0 as the successor product. This lifecycle wording does not establish direct interchangeability. Verify the voltage class, protection version, connectors, revision markings and installed drive configuration before any replacement decision.
It identifies a Siemens 21F thyristor gate unit for 8 kV equipment.
The official description refers to electronic over-voltage protection in the documented 3.6 kV to 7 kV range.
The Siemens product portal states End Prod.Lifecycl. for this exact order number.
No. Voltage class, protection version, connectors, revisions and the installed drive configuration must be checked.
Review the full unit, readable product label, connectors, revision markings and packaging condition.
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
Verification, inspection, packaging and logistics support for Siemens 6SL3955-0TX00-1AA0
Our process is designed to give purchasing teams and engineers clear evidence before shipment. Each request is handled around the exact order number, condition requirement and destination rather than a generic product description.
| Service Step | What We Check |
|---|---|
| Model and Suffix Verification | The complete Siemens order number, suffix and visible revision markings are compared with the request. |
| Condition Confirmation | Packaging, seals, enclosure condition and included items are reviewed against the offered condition. |
| Technical Compatibility Review | Available labels, interfaces, connector arrangements and customer-provided system details are compared before approval. |
| Product and Label Photos | Clear inspection images can be supplied for model, revision, connector and condition confirmation. |
| Protective Packaging | Antistatic protection, cushioning and an outer carton are selected for industrial electronic modules. |
| Worldwide Shipping | Available carrier options are coordinated according to destination, package requirements and applicable restrictions. |
| Tracking and Customs Documents | Shipment tracking and standard commercial documents are prepared for the selected route. |
| Warranty and Returns | Written warranty terms and the return authorization process are provided with the commercial agreement. |
| After-Sales Response | Our team follows up on documentation, shipment status and reported product issues. |
Before dispatch, the team checks the visible manufacturer label, order number, revision markings, physical condition and available accessories. Product evidence is compared with the quotation and buyer requirements. Packaging and shipping documents are then prepared for the agreed transport route. This process supports traceable communication without promising unverified quantities or fixed delivery times.
Look for complete company contact details, clear product identification, inspection evidence, written commercial terms and a documented after-sales process.
Confirm the quotation, full order number, product-label photos, condition statement, warranty scope, shipping terms, customs documents and return authorization procedure.
Compare the complete model and suffix, hardware revision, connectors, rack location, power arrangement, signal assignment and project configuration with the installed system.
Warning signs include an incomplete model number, refusal to provide label photos, conflicting specifications, unclear condition descriptions and no explained return process.
Email and WhatsApp details are provided for model verification, inspection requests, packaging coordination and shipping support.
Email: sales6@apterpower.com | WhatsApp: +86 18159889985
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Email: sales6@apterpower.com | WhatsApp: +86 18159889985
