Siemens 6RY1803-0DA03 SINAMICS DCM Power Interface
A discontinued power-interface spare assembly supplied with terminals and replaced by the functional-safety successor.
Product Overview
6RY1803-0DA03 is a Siemens power-interface spare assembly supplied with terminals and identified with printed-board designation C98043-A7106-L1. It belongs to the service-parts context used for SINAMICS DCM converter power sections.
Siemens marks the original article discontinued and names 6RY1803-1DA03 as its successor. The successor adds a Functional Safety designation, so compatibility must be evaluated from the complete converter and revision rather than assumed from the similar article number.
Performance
- Interfaces control electronics with the assigned converter power section.
- Provides the terminal-equipped service assembly used for a controlled field replacement.
- Maintains the hardware path required by the SINAMICS DCM diagnostic and firing-control architecture.
Technical Details
| Manufacturer | Siemens |
|---|---|
| Article Number | 6RY1803-0DA03 |
| Product Type | Power interface including terminals |
| Printed-Board Designation | C98043-A7106-L1 |
| Lifecycle | Discontinued since 14 October 2022 |
| Named Successor | 6RY1803-1DA03 |
| Successor Distinction | Functional Safety execution |
System Integration
- Confirm the full converter MLFB, rated power section, option set and board release before approving the successor.
- Isolate all power sources, observe discharge times and document every connector and terminal before removal.
- Transfer only the hardware included in the approved Siemens service procedure.
- After installation, review diagnostics, interlocks and the affected armature and field functions under controlled conditions.
Applications
- Maintenance of the assigned SINAMICS DCM converter power section
- Like-for-like service where the original terminal-equipped assembly is documented
- Engineered successor evaluation using 6RY1803-1DA03
FAQ
Is 6RY1803-0DA03 still an active Siemens product?
No. Siemens lists it as discontinued and names 6RY1803-1DA03 as the successor.
Can 6RY1803-1DA03 replace 6RY1803-0DA03 without checking the converter?
No. The successor carries a Functional Safety distinction, so converter assignment, release level, terminals and commissioning requirements must be reviewed.
Does 6RY1803-0DA03 identify only a bare printed circuit board?
No. The Siemens article describes a power-interface spare assembly including terminals; the C98043 number identifies its printed-board designation.
What should be sent for a 6RY1803-0DA03 enquiry?
Provide the converter MLFB, original 6RY label, C98043 label, board release, terminal photographs and fault history.
What must be checked after a 6RY1803-0DA03 replacement?
Validate wiring, protective earth, diagnostics, interlocks, firing control and the affected converter operating sequence before returning the drive to service.
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