Compaq PO1A90CBF1USTK Power Controller Backplane Board 005637-001 Rev 0C

Compaq PO1A90CBF1USTK Power Controller Backplane Board 005637-001 Rev 0C

The Compaq PO1A90CBF1USTK is a Power/Controller Backplane board designed for use within Compaq server and storage systems. This board routes power and control signals between the system's drives, controllers, and power subsystem, serving as the central interconnect backbone for those components. The part number is silkscreened directly on the PCB alongside the Compaq name, and the assembly label confirms ASH 005637-001 Rev 0C, assembled in the USA.

Specifications & What's Included

• Manufacturer Part Number (MPN): PO1A90CBF1USTK
• Assembly Number: ASH 005637-001
• Revision: Rev 0C
• Drawing Number: DG 005638-000
• Type: Power/Controller Backplane Board
• Country of Manufacture: USA (per label: Assembled in USA)
• Form Factor: PCB card/board
• Visible connectors: multiple high-density edge connectors and multi-pin board-to-board connectors
• Integrated sheet-metal power module cage/bracket mounted to board surface
• Multiple smaller JST-style and keyed multi-pin inline connectors for power and signal distribution
• Includes: board only

Applications

Power/controller backplanes like this one are core components in Compaq ProLiant and similar late-1990s to early-2000s server and storage enclosures. The backplane provides the physical and electrical bus that drive bays, controller cards, and power supplies all connect to, eliminating point-to-point cabling and allowing hot-swap or tool-less drive management. In Compaq's architecture of this era, the power/controller backplane often combined both the drive signal bus and the power distribution function on a single board — a design that simplified enclosure assembly and improved reliability in dense rack configurations. This board is the type of part sought by maintenance teams keeping legacy Compaq server hardware in service, as well as integrators and repair technicians sourcing spares for older Compaq storage arrays and tower/rack server chassis.