[ INDIVIDUAL COMPONENT // COOLING ]
Noctua NF-A4x20 PWM
40×20 mm, up to 5000 RPM, 9.4 m³/h and 2.26 mm H₂O.
IDENTIFICATION: Match complete model, suffix, revision and bundle before installation. Related variants can differ in dimensions, brackets, wiring, connector, and operating limits.
Manufacturer specifications
| Catalog subcategory | Server Fans And Blowers |
|---|---|
| Exact model | Noctua NF-A4x20 PWM |
| Published specifications | 40×20 mm, up to 5000 RPM, 9.4 m³/h and 2.26 mm H₂O. |
| Compatibility and mounting | 40 mm square mount, 20 mm depth; verify OEM fan tray, tach alarm and pinout. |
| Connector and electrical limitations | 12 V 4-pin PWM, max 0.05 A; adapter does not guarantee host pin compatibility. |
Safe installation and maintenance
Disconnect power and hold the rotor still during dusting; do not overspin with compressed air. Verify the host pinout, fan direction, current rating and tach behavior before substitution.
- Follow the exact manufacturer manual for this model and host; do not interchange similar-looking parts or hardware.
- After service, verify pump/fan operation and temperature behavior under monitored conditions before normal workload.
Manufacturer source
- www.noctua.at — Noctua NF-A4x20 PWM product informationManufacturer specifications; verify current revision-specific manual and compatibility details before installation.
This static catalog entry is an identification aid, not a compatibility guarantee; ratings can vary by revision or SKU.