171531-001 is an HP/Compaq 5-inch hot-plug system I/O fan assembly designed for the ProLiant ML530 and ML570 server families, particularly ML530 G2 and ML570 G2 systems. HP parts references identify it specifically as the Hot-plug system I/O fan, while the ML530 service guide lists it as the system fan with up to four supported per server.
- Part Number: 171531-001
- Manufacturer: HP / Compaq
- Product: Hot-Plug System I/O Fan
- Fan Size: 5-inch / approximately 127mm
- Fan Type: Hot-plug / hot-swap axial fan
- Primary Function: System-board and I/O area cooling
- Hot-Plug: Yes
- Compatible Systems: HP/Compaq ProLiant ML530 G2 and ML570 G2, with related compatibility in the ProLiant 8500 family.
- Maximum Quantity: Up to 4 system fans in supported ML530 configurations.
- Application: Server chassis, processor-area and I/O cooling
- Related Part: 323457-002 — compatible replacement/reference fan.
- Related Fan Kit: 128284-B21 — ML530 G2/ML570 G2 hot-swap fan kit.
- Related Fan Basket: 161658-001 — system fan basket
- Included: 1 × hot-plug system I/O fan assembly
- Compatibility Note: 171531-001 is the 5-inch system/I/O fan, distinct from the 161657-001 92mm hot-plug drive fan used for drive-area cooling.