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)

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

Product ID: 43512932

Details

Brand
Noctua
Compatible Devices
Desktop
Cooling Method
Air
Global Trade Identification Number
Material
Fibre-glass
Maximum Rotational Speed
5000 RPM

⚡5V PWM power control

🌀5000 RPM max speed

🔇Ultra-quiet 14.9 dB(A)

$U1680

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Description

🛠️ Small Fan, Big Impact: Quiet Cooling That Means Business

BUILT TO LAST - Over 150,000 hours MTTF means this fan keeps your gear cool and your mind at ease for years.
COMPACT YET MIGHTY - Perfectly sized 40x20mm fits niche tech like NVIDIA Jetson Nano and 1U servers without compromise.
PRECISION PWM CONTROL - Dynamic 4-pin PWM lets you fine-tune cooling performance for ultimate efficiency and silence.
WHISPER QUIET POWERHOUSE - Experience supreme airflow at a barely-there 14.9 dB noise level—your workspace stays zen.
ALL INCLUSIVE INSTALLATION KIT - Comes with anti-vibration mounts, screws, extension cable, and OmniJoin adaptor for seamless setup.

The Noctua NF-A4x20 5V PWM is a premium, ultra-quiet 40x20mm fan designed for specialized 5V applications like NVIDIA Jetson Nano and network equipment. Featuring advanced acoustic optimization and Flow Acceleration Channels, it delivers up to 5000 RPM airflow at just 14.9 dB noise. With a 4-pin PWM connector for precise speed control and a robust 150,000-hour lifespan, it ensures reliable, whisper-quiet cooling. Includes anti-vibration mounts and adaptors for easy installation, backed by a 6-year warranty.

Specifications

ASIN	B071FNHVXN
Best Sellers Rank	#228 in Computer Case Fans
Brand	Noctua
Brand Name	Noctua
Compatible Devices	Desktop
Cooling Method	Air
Customer Reviews	4.8 out of 5 stars 938 Reviews
Global Trade Identification Number	09010018100136
Item Dimensions L x W x H	1.57"L x 0.79"W x 1.57"H
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
Part Number	NF-A4x20 5V PWM
Power Connector Type	4-Pin
Product Dimensions	1.57"L x 0.79"W x 1.57"H
Unit Count	1.0 Count
Voltage	5 Volts
Warranty Description	6 year manufacturer’s warranty

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$U1680

Duties & taxes included

In stock

Sold byAmazon UruguayDelivered 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 Uruguay.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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