Interfaces the SINAMICS DCM control electronics with the thyristor power section.
Product Identification
C98043-A7105-L4 is the Siemens power-interface board documented for four-quadrant SINAMICS DCM Base Drives across the 480 V rating range. Siemens lists 6RY1803-0DA02 as the corresponding spare-part number.
The L4 identity must be kept complete. Similar A7105 artwork and neighboring 6RY1803 board numbers can serve different quadrant, voltage or safety executions.
Engineering Data
| Manufacturer | Siemens |
|---|---|
| Exact Board Model | C98043-A7105-L4 |
| Product Family | SINAMICS DCM |
| Product Type | Power interface board |
| Drive Operation | Four-quadrant only |
| Voltage Range in Base Drive Manual | All 480 V ratings |
| Siemens Spare Part Number | 6RY1803-0DA02 |
| Recommended Spare Quantity | One per documented spare-parts list |
| Hardware Revision Note | Check the complete L4 hardware suffix printed on the PCB |
| Selection Rule | Match drive nameplate, quadrant configuration and board label |
Functions
Serves the four-quadrant power-converter arrangement documented for the 480 V Base Drive.
Carries hardware-revision information used by Siemens control and service logic.
Provides a direct service mapping to Siemens spare 6RY1803-0DA02.
Applications
- Four-quadrant SINAMICS DCM Base Drives at 480 V where C98043-A7105-L4 is installed.
- Corrective maintenance after interface-board diagnostics and power-stage checks.
- Planned spares programs that keep PCB artwork, hardware suffix and 6RY spare number together.
- Drive modernization reviews where the existing DCM power section remains in service.
Lifecycle
- Archive the complete drive and PCB labels, including the characters following L4 when present.
- Save parameter sets, fault history, firmware and firing-circuit diagnostics before removal.
- Inspect thyristors, fuses, current feedback, gate leads and auxiliary supplies before fitting the replacement.
- After installation, complete firing-pulse, direction, current-feedback and controlled load tests for both quadrants.
About IndustryParts
https://www.industryparts.com/Power-interface variants are separated
IndustryParts verifies C98043-A7105-L4 as the four-quadrant 480 V power-interface board and keeps its 6RY1803-0DA02 spare mapping visible.
- L4 artwork retained
- Four-quadrant use checked
- Spare mapping recorded
FAQ
Which Siemens spare number maps to C98043-A7105-L4?
The SINAMICS DCM Base Drive manual lists 6RY1803-0DA02 for this four-quadrant 480 V power-interface board.
Can a visually similar A7105 board replace C98043-A7105-L4?
Only after the full PCB and hardware suffix, drive voltage and quadrant configuration agree with Siemens documentation.
Why record the characters after L4 on C98043-A7105-L4?
Siemens uses complete hardware revisions in service and control checks; truncating the label can hide a compatibility boundary.
What should be tested before energizing C98043-A7105-L4?
Check power semiconductors, fuses, gate paths, auxiliary supplies, feedback and insulation so an external fault does not damage the new board.
How is a four-quadrant repair with C98043-A7105-L4 accepted?
Verify both torque directions, stable current feedback, correct firing behavior, fault-free reversal and the restored drive parameter record.
