Can these be wired to a usb connector and run off a usb wall charger?

Yes. I run mine off of the gpio pins on a raspberry pi. That's the same concept.

Does this noctua nf-a4x20 5v pwm premium-quality quiet 40mm fan come with the mounting screws?

Yes, it comes with screws a couple of different connectors for attaching it to 3 and 4 pin connections also some rubbery plug things to pull through the mount holes.

Can a 3.3v PWM signal be used to control fan speed?

Yes, a 3.3V logic (PWM) signal will control this fan. I use an Arduino DUE board to control this fan. The DUE puts out 3.3V logic signals.

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Noctua NF-A4x20 5V PWM, Premium Quiet Fan, 4-Pin, 5V Version (40x20mm, Brown)

Product ID: 258574069

Details

Brand
Noctua
Cooling method
Air
Power connector type
4-Pin
Product dimensions
20L x 40W x
Voltage
5 Volts

⚡5V power efficiency

🔄4-pin PWM precision control

🤫Ultra-quiet 14.9 dB noise level

225.41 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌀 Elevate your cooling game with whisper-quiet precision!

BUILT TO LAST - Over 150,000 hours MTTF backed by a 6-year warranty—reliability that keeps your systems running smoothly.
COMPACT POWERHOUSE - Sized at 40x40x20mm, ideal for tight spaces like NVIDIA Jetson Nano, 1U servers, and network gear upgrades.
AWARD WINNING DESIGN - Flow Acceleration Channels and Acoustic Optimisation frame deliver superior airflow and cooling efficiency.
PRECISION PWM CONTROL - 4-pin PWM ensures dynamic speed adjustments up to 5000 RPM for optimal cooling without wasting energy.
WHISPER QUIET COOLING - Experience near-silent airflow at just 14.9 dB, perfect for focused workspaces and noise-sensitive environments.

The Noctua NF-A4x20 5V PWM is a premium, ultra-quiet 40x40x20mm fan designed for efficient cooling in compact devices like NVIDIA Jetson Nano and network equipment. Featuring 4-pin PWM control for dynamic speed up to 5000 RPM, it operates at a minimal noise level of 14.9 dB and boasts an impressive lifespan of over 150,000 hours, backed by a 6-year warranty.

Specifications

ASIN	B071FNHVXN
Best Sellers Rank	#11,890 in Computers ( See Top 100 in Computers ) #66 in Computer Case Fans
Brand Name	Noctua
Compatible Devices	Desktop, Gaming Console, Laptop, Server
Cooling Method	Air
Customer Reviews	4.8 4.8 out of 5 stars (946)
Global Trade Identification Number	09010018100136
Item Dimensions L x W x H	20L x 40W x 40H millimeters
Item Weight	84 Grams
Manufacturer	Noctua
Material Type	Fibre-glass reinforced PBT
Maximum Rotational Speed	5000 RPM
Model	NF-A4x205VPWM
Noise Level	14.9 Decibels
Number of Items	1
Number of Packs	1
Part Number	NF-A4x20 5V PWM
Power Connector Type	4-Pin
Unit Count	1 Count
Voltage	5 Volts
Warranty Description	6 year manufacturer’s warranty

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TrustScore 4.5 | 7,300+ reviews

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225.41 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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