ABB SK-U1-PS1-H1 Power Supply Board – Obsolete ACS/DCS Drive Spare Part

Technical Dossier

Product Details And Specifications

ABB SK-U1-PS1-H1 Power Supply Board – Obsolete ACS/DCS Drive Spare Part

DriveKNMS reviews sourcing options for this model through RFQ handling before quotation.

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters specific to your drive frame size and voltage class should be confirmed against your drive's service manual. We do not publish unverified specifications.

Solving the Discontinued Hardware Crisis

The ABB SK-U1-PS1-H1 power supply board serves as the internal DC regulation and control power backbone for the drive control section. In legacy ACS and DCS series drives, this board distributes regulated voltage to the control electronics, gate driver circuits, and I/O interface boards. Its failure mode is rarely sudden — degraded electrolytic capacitors cause erratic drive behavior, nuisance trips, and communication faults long before a hard failure occurs. By the time a maintenance team isolates the fault to this board, the drive may have been producing intermittent quality defects for weeks.

How to extend your ABB drive asset life by 5 to 10 years without a system overhaul:

Condition & Reliability Assurance

Every SK-U1-PS1-H1 unit shipped by DriveKNMS passes a structured 5-step inspection protocol before release:

1. Visual and mechanical inspection: Board surface examined for physical damage, burn marks, cracked solder joints, and component displacement.
2. Electrolytic capacitor assessment: All electrolytic capacitors checked for bulging, leakage, and ESR values. Aged capacitors are replaced with specification-matched components before the board is classified as serviceable.
3. Pin and connector integrity check: All edge connectors and pin headers inspected for corrosion, oxidation, and mechanical deformation. Corroded contacts are treated or the board is downgraded.
4. Firmware version verification: Where applicable, firmware revision is documented and cross-referenced against known compatibility matrices for the target drive series.
5. Functional power-up test: Board is bench-tested under controlled conditions to verify regulated output voltages and absence of fault conditions prior to packaging.

Units that do not pass all five stages are not shipped. They are either reconditioned to standard or held for parts recovery only.

Key Features for System Maintenance

• Drop-in replacement: The SK-U1-PS1-H1 installs directly into the original drive chassis using the existing mounting points and connector positions. No mechanical modification is required.
• No drive reprogramming required: Drive parameters stored in the main control board are not affected by a power supply board replacement. Application configuration is preserved.
• No engineering redesign: Unlike a drive platform migration, a board-level replacement requires no changes to motor cabling, control wiring, PLC interface, or HMI configuration. Commissioning time is measured in hours, not weeks.
• Avoids cascade procurement: Replacing the drive platform typically requires updated motor protection relays, cable sizing reviews, and updated documentation. A board replacement avoids this entire cost chain.

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.