QNAP PWR-ADAPTER-120W-A01 120W 4-Pin External Power Adapter
Overview
The PWR-ADAPTER-120W-A01 is a 120W external power adapter from QNAP, designed to replace or supplement the power supply on compatible QNAP NAS enclosures that require a 4-pin DC input. At 120W output, it delivers enough headroom for multi-drive desktop NAS units without an internal PSU — keeping the enclosure compact while offloading heat generation from the chassis. This is the correct replacement when the factory adapter fails or when deploying a spare-parts stock for a fleet of QNAP units on a managed network.
Compatibility
The PWR-ADAPTER-120W-A01 is designed for QNAP NAS enclosures that accept a 4-pin external DC power connector and require a 120W supply. Verify your enclosure's power input spec and connector pinout against this adapter before ordering — QNAP produces multiple adapter form factors (65W, 90W, 120W, and higher) across its desktop NAS lineup, and selecting the wrong wattage or connector type will prevent proper installation. Consult the hardware user guide for your specific QNAP NAS model to confirm compatibility before procurement.
Installation Notes
Connect the 4-pin DC barrel connector to the matching port on the rear of the NAS enclosure before connecting the AC input to mains. Ensure the AC outlet voltage matches the adapter's input rating. Do not substitute this adapter on enclosures rated for a different wattage — undersupply under full drive load can cause instability or shutdown during write-intensive operations such as RAID rebuilds.
