Siemens 6SL3351-1AE37-5BA1 Replacement Power Block
A 745 A SINAMICS replacement power block covering the rectifier and U-phase section of a 380–480 V drive or power module.
Key Information
6SL3351-1AE37-5BA1 is a Siemens SINAMICS replacement power block for the rectifier and U-phase section of the corresponding drive or power module. Siemens identifies it as a painted spare with nickel-plated busbars for the 380–480 V, 745 A class.
It is a service component rather than a complete commissioned drive. The host module, phase assignment and qualified replacement procedure must be established before ordering.
Functions
- Restores the rectifier and U-phase power-semiconductor section in the documented SINAMICS host assembly.
- Retains the painted-module and nickel-plated-busbar execution specified by the full article number.
- Supports repair of the associated high-current drive or power module without substituting the separate V/W-phase spare.
Specifications
| Manufacturer | Siemens |
|---|---|
| Article Number | 6SL3351-1AE37-5BA1 |
| Product Type | Replacement power block spare |
| Host Family | SINAMICS drive / power module |
| Assigned Section | Rectifier and U phase |
| Supply Class | 380–480 V, three-phase AC |
| Frequency | 50 / 60 Hz |
| Current Class | 745 A |
| Construction | Painted modules |
| Busbars | Nickel plated |
| Lifecycle Status | PM300 active spare part |
Installation
- Use only within the Siemens-defined host module and follow the approved high-voltage repair procedure.
- Isolate mains and DC link, prove zero energy and apply the required discharge waiting time.
- Record every power, gate-drive, busbar, cooling and protective connection before disassembly.
- After repair, complete insulation, torque, cooling, phase, parameter and controlled-power tests.
Lifecycle
- Keep the 6SL3351 article number separate from 6SL3352 because the assigned power sections differ.
- Retain service records, torque data and repaired-host serial number with the replacement block.
- Use qualified Siemens drive service personnel for component-level power-block work.
FAQ
Can 6SL3351-1AE37-5BA1 replace 6SL3352-1AE37-5BA1?
No direct interchange should be assumed: 6SL3351 is assigned to the rectifier and U phase, while 6SL3352 is assigned to the V and W phases.
Is 6SL3351-1AE37-5BA1 a complete SINAMICS drive?
No. It is a replacement power-block spare that must be installed in the correct host module.
What host information is required before quoting 6SL3351-1AE37-5BA1?
Provide the complete drive or power-module article number, serial number, voltage/current rating, cabinet execution and failure report.
Why must the painted and nickel-plated execution be checked?
Those construction details are part of the full spare identity and should remain aligned with the installed host and environmental design.
What tests are needed after fitting 6SL3351-1AE37-5BA1?
A qualified service process should verify insulation, busbar torque, gate-drive connections, cooling, rectifier function, U-phase output and controlled loading.
Can 6SL3351-1AE37-5BA1 be installed during ordinary field maintenance?
Its high-energy power section requires trained personnel, the approved repair procedure and suitable electrical test equipment.
