QNAP SP-4BAY-PSU Power Supply Unit for 4-Bay NAS

Overview

The SP-4BAY-PSU is a QNAP replacement power supply unit designed specifically for 4-bay NAS enclosures. If a failed PSU has taken a unit offline, swapping in a factory-new SP-4BAY-PSU restores operation without replacing the entire chassis — the correct path when the NAS hardware itself is otherwise healthy. This is a genuine QNAP component, not a third-party substitute.

Compatibility

The SP-4BAY-PSU is intended for QNAP 4-bay NAS models that accept this PSU form factor. Verify your specific model's power supply compatibility against QNAP's accessory listing for your enclosure before ordering — PSU form factors and connector pinouts differ across enclosure generations and are not universally interchangeable. The SP-4BAY-PSU appears as a listed accessory for select 4-bay enclosures in QNAP's parts catalog; cross-reference your chassis model number against that listing to confirm fit.