Noctua NF-A20 5V PWM - Brown
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Product Information
Full details
The Noctua NF-A20 5V PWM is a premium 200x200x30mm fan designed for users seeking superior, quiet cooling performance in 5V applications. Its key benefit lies in its award-winning design featuring Flow Acceleration Channels and an Advanced Acoustic Optimisation frame, delivering exceptional airflow with minimal noise. A potential caveat is its specific 5V requirement, making it unsuitable for standard 12V motherboard fan headers without adaptation.
All features
| Colour | Brown |
|---|---|
| Model Part Number | NF-A20 5V PWM |
| Brand | Noctua |
Extended Product Information
FAQs
Can I connect this 5V fan to a standard 12V motherboard fan header?
No, this is a 5V fan and should not be connected directly to a 12V motherboard fan header. Doing so can damage the fan. Use the included USB power adaptor or a dedicated 5V controller if your motherboard only has 12V headers.
What is the maximum fan speed?
The maximum speed for the Noctua NF-A20 5V PWM is 800 RPM.
How is this fan powered if not through a motherboard header?
It can be powered via the included USB power adaptor cable, which allows connection to any standard USB port (e.g., on a PC, power bank, or USB power supply).
What does 'PWM' mean in the product name?
PWM stands for Pulse Width Modulation. It allows the fan's speed to be dynamically controlled by sending varying pulses of power, enabling quieter operation at low loads and maximum airflow when needed.
What is the typical lifespan of this fan?
The Noctua NF-A20 5V PWM has a Mean Time To Failure (MTTF) rating of over 150,000 hours, indicating a very long operational lifespan under normal conditions.
Does the fan come with mounting hardware?
Yes, the package includes anti-vibration mounts and fan screws for installation.
What is the noise level of this fan?
The maximum noise level is 18.1 dB(A).
Troubleshooting
Fan not spinning
Ensure the 4-pin connector is fully seated. Verify that the connected 5V power source is active. If using a motherboard header, confirm it is a 5V header and that PWM control is enabled in the BIOS/UEFI. Check if the fan is connected via the USB adaptor and that the USB port is providing power.
Fan spinning but making unusual noise
Check for obstructions (e.g., cables) hitting the fan blades. Ensure the fan is securely mounted and not vibrating against the chassis. Clean the fan blades of dust buildup.
Fan speed is not changing with PWM control
Verify that the fan is connected to a PWM-capable header. Ensure PWM mode is enabled in your system's BIOS/UEFI or fan control software. Check that the fan is receiving sufficient voltage from its power source.
Fan not recognized by system/controller
Confirm the fan is correctly plugged into the header or controller. Try connecting the fan directly to a known working 5V PWM header or using the USB adaptor to rule out issues with the existing controller.
Pros and Cons
Pros
- Exceptional cooling performance for its size.
- Extremely quiet operation, even at higher speeds.
- High durability with a long MTTF rating.
- Versatile power options with USB adaptor included.
- Supports PWM for precise speed control.
- Premium build quality expected from Noctua.
Cons
- Designed specifically for 5V systems; not directly compatible with standard 12V motherboard fan headers.
- The 200mm size may not fit all standard PC cases or component mounts.
- Higher price point compared to non-premium or smaller fans.
Setup, Compatibility & Care
Setup:
- Standard 5V PWM Connection: Connect the 4-pin PWM cable to a compatible 5V motherboard header or controller. Ensure the header supports PWM functionality for speed control.
- USB Power Connection: For use with USB ports, power banks, or USB power supplies, attach the included USB power adaptor cable to the fan's 4-pin connector and plug the USB end into your power source.
- Mounting: Use the provided anti-vibration mounts and fan screws for secure installation. The large 200mm size may require specific mounting points in your case or enclosure.
- OmniJoin Adaptor: If connecting to a proprietary fan header, utilize the included OmniJoin adaptor set according to its instructions.
Compatibility:
- Voltage: This fan is designed for 5V applications. Do not connect it to a 12V fan header directly, as this could damage the fan.
- Connectors: Features a 4-pin PWM connector. The included USB adaptor broadens compatibility with USB power sources.
- Physical Size: Measures 200x200x30mm. Verify compatibility with your mounting location.
Care:
- Regularly dust the fan blades and frame to maintain optimal performance. A soft brush or compressed air can be used.
- Avoid exposing the fan to excessive moisture or dust.
- Do not attempt to disassemble the fan motor; this will void the warranty.