Noctua NF-A4x20 5V PWM
Case fan | 40 mm
Main Specification
| Product Description | Noctua NF-A4x20 5V PWM - case fan |
|---|---|
| Product Type | Case fan |
| Package Content | Screws, OmniJoin Adaptor Set, extension cable (30 cm), NA-AV3 anti-vibration mounts |
| Fan Diameter | 40 mm |
| Fan Height | 20 mm |
| Fan Bearing | SSO2 bearing |
| Rotation Speed | 5000 rpm |
| Air Flow | 9.4 cfm |
| Noise Level | 14.9 dBA |
| Power Connector | 4-pin fan connector |
| Rated Voltage | 5 V |
| Features | Pulse-width modulation (PWM) support, Advanced Acoustic Optimisation (AAO), flow acceleration channels, Smooth Commutation Drive (SCD) technology, integrated anti-vibration pads, Stepped Inlet Design, Inner Surface Microstructures |
| Dimensions (WxDxH) | 4 cm x 4 cm x 2 cm |
| Manufacturer Warranty | 6-year warranty |
General
| Product Type | Case fan |
|---|---|
| Package Content | Screws, OmniJoin Adaptor Set, extension cable (30 cm), NA-AV3 anti-vibration mounts |
| Width | 4 cm |
| Depth | 4 cm |
| Height | 2 cm |
Heatsink & Fan
| Fan Diameter | 40 mm |
|---|---|
| Fan Height | 20 mm |
| Fan Bearing | SSO2 bearing |
| Rotation Speed | 5000 rpm |
| Air Flow | 9.4 cfm |
| Noise Level | 14.9 dBA |
| Power Connector | 4-pin fan connector |
| Rated Voltage | 5 V |
| Rated Current | 0.1 A |
| Power Consumption | 0.5 W |
| Features | Pulse-width modulation (PWM) support, Advanced Acoustic Optimisation (AAO), flow acceleration channels, Smooth Commutation Drive (SCD) technology, integrated anti-vibration pads, Stepped Inlet Design, Inner Surface Microstructures |
Miscellaneous
| Mounting Kit | Included |
|---|---|
| MTBF | 150,000 hour(s) |
Manufacturer Warranty
| Service & Support | Limited warranty: - 6 years |
|---|
Product features
Polarity protection
As many devices using 5V fans feature proprietary connectors and documentation of the pin alignment may not be available, the fan features an integrated diode for polarity protection. This way, you're on the safe side if you accidentally connect it with reverse polarity.Flow acceleration channels
The NF-A4x20 impeller features suction side flow acceleration channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.AAO frame
Noctua's AAO frames feature integrated anti-vibration pads as well as Noctua's proprietary stepped inlet design and inner surface microstructures, both of which further refine the fan's performance/noise efficiency.Key selling points
- Polarity protection
- Flow acceleration channels
- AAO frame
References
MPN: NF-A4x20 5V PWM
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04/06/2026 01:46:11