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Siemens uses the A5E prefix to identify spare parts, replacement modules, and accessory components across its industrial automation product families. These article numbers cover components spanning the SIMATIC, SINAMICS, SINUMERIK, SIMOVERT, and SIRIUS product lines — from individual PCBs and power supply boards to interface modules and sub-assemblies.
The A5E article number is a Siemens internal spare part designation, separate from the product order number (MLFB). When a service technician identifies a failed component inside a Siemens system, the A5E number on the board or module label is the direct reference for ordering the correct replacement. It ensures the correct mechanical fit, pin compatibility, and electrical specification match.
| Parameter | Value |
|---|---|
| Part Number | A5E00126347 |
| Manufacturer | Siemens |
| Article Format | A5E spare part series |
| Application | Siemens industrial automation systems |
| Use Case | Replacement / repair component |
The A5E00126347 is a replacement component for Siemens industrial systems. A5E-series spare parts are deployed across manufacturing plants, process industries, machine tool installations, and building automation where Siemens drive, control, or motion systems operate.
When a component carrying this A5E number fails in service, the A5E00126347 replacement provides the correct physical and electrical characteristics to restore the system to its original specification. The part number alone is sufficient for cross-referencing against the Siemens spare parts catalogue and confirming compatibility with the parent system in which it is installed.
System maintenance: A Siemens drive or control system develops a component fault. During service, the technician identifies the A5E00126347 as the failed part from the board or module label. The replacement component is fitted to restore system operation.
Preventive spare stock: Facilities operating Siemens automation systems maintain A5E spare components in local stock to reduce repair turnaround time for critical production equipment.
Q1: How do I confirm the A5E00126347 is the correct replacement for my Siemens system?
Cross-reference the A5E00126347 against the spare parts list for the specific Siemens product model in which it is installed. The spare parts list is found in the service manual or via the Siemens Industry Online Support portal using the parent product's MLFB order number. If the A5E00126347 appears in the spare parts table for your system model, it is the confirmed correct replacement.
Q2: What is the difference between an A5E article number and a Siemens MLFB order number?
The MLFB (Maschinenlesbare Fabrikatnummer) is the configurable order number used to specify and order a complete Siemens product — for example, a drive, CPU, or HMI. The A5E article number identifies a specific spare part or sub-assembly within that product. They serve different purposes: the MLFB identifies what you buy, the A5E identifies what you replace during service.
Q3: Can the A5E00126347 be used across multiple Siemens product lines?
A5E spare parts are typically specific to one or a small group of related parent products. The A5E00126347 applies to the Siemens system in which it is originally installed. Do not assume cross-compatibility across unrelated Siemens product families without first verifying the spare parts list for the target system.
Q4: Is it necessary to reconfigure or commission the system after fitting the A5E00126347?
This depends on the type of component the A5E00126347 represents. Hardware components such as power supply boards or interface modules typically require no recommissioning. Components that carry firmware, parameters, or calibration data may require a firmware download or parameter restore after fitting. Confirm the component type and any commissioning requirements from the relevant Siemens service documentation before proceeding.
Q5: Are original Siemens A5E components distinguishable from third-party equivalents?
Original Siemens A5E components carry the Siemens logo, holographic quality label, and the A5E article number on the component label. Counterfeit or unqualified parts may bear similar markings but lack the traceability and quality assurance of genuine Siemens spare parts. For safety-critical systems, verify the supplier's authorisation status before purchasing.
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