SIMATIC S5 PS951 120/230 V AC to 5 V DC, 3 A power supply
Siemens 6ES5951-7LB21 is a SIMATIC S5 PS951 power supply for S5-115U/H automation systems. Siemens specifies operation without a backup battery, with 120/230 V AC input and a 5 V DC output rated at 3 A. The module supports the rack power requirements of installed S5 systems and is primarily relevant to maintenance, restoration and strategic spare-part planning. Procurement should verify the complete order number, input-voltage selection, rack type, connector arrangement, output loading, adjacent modules and system wiring. Clear product-label and connector photographs should be compared with the installed supply before replacement 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 | 6ES5951-7LB21 |
| Product Type | PS951 power supply module |
| Product Family | SIMATIC S5 |
| Compatible System | S5-115U/H |
| Backup Battery | Without backup battery |
| Input Voltage | 120/230 V AC |
| Output Voltage | 5 V DC |
| Output Current | 3 A |
| Packaging Dimensions | 31.3 x 21.2 x 7.3 cm |
| Net Weight | 1.44 kg |
| Replacement Note | Product cancelled without a replacement product |
| Country of Origin | Germany |
| Review Area | Application Guidance |
|---|---|
| System Context | Installed SIMATIC S5-115U/H automation racks |
| Functional Role | Provides regulated 5 V DC rack power at 3 A |
| Typical Use | Maintenance and restoration of legacy S5 control systems |
| Electrical Review | Confirm 120/230 V AC selection, 5 V DC load and wiring |
| Engineering Review | Check rack type, connectors, adjacent modules and system documentation |
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 6ES5951-7LB21 and states that the product is cancelled without a replacement product. Confirm the PS951 version, S5-115U/H rack, input-voltage selection, output loading and connector arrangement before maintenance use.
It identifies a Siemens SIMATIC S5 PS951 power supply module.
Siemens specifies the PS951 for S5-115U/H systems.
The official record specifies 120/230 V AC input and 5 V DC output at 3 A.
The Siemens product portal states End Prod.Lifecycl.
No. Siemens states that the product is cancelled without a replacement product.
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 6ES5951-7LB21
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
