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.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

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

🔇Ultra-quiet 14.9 dB(A)

🕒150,000+ hours MTTF

⚙️5000 RPM max speed

€ 55.75

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

Description

🌀 Small fan, big impact — cool smarter, not louder!

BUILT TO LAST - Over 150,000 hours mean-time-to-failure guarantees long-term reliability and peace of mind.
SMART PWM CONTROL - 4-pin PWM ensures dynamic speed adjustment for optimal airflow and energy efficiency.
AWARD WINNING DESIGN - Flow Acceleration Channels and Acoustic Optimization deliver superior cooling with style.
COMPACT PRECISION FIT - 40x40x20mm size engineered for seamless integration in Jetson Nano, NAS, and 1U servers.
WHISPER QUIET POWERHOUSE - Experience premium cooling with barely-there noise at just 14.9 dB(A).

The Noctua NF-A4x20 5V PWM is a premium 40x40x20mm quiet fan designed for professional-grade cooling in compact devices like NVIDIA Jetson Nano, network equipment, and servers. Featuring a max speed of 5000 RPM, ultra-low noise of 14.9 dB(A), and a robust 150,000+ hour lifespan, it combines award-winning aerodynamic design with smart PWM control for efficient, whisper-quiet airflow. Backed by a 6-year warranty, it’s the go-to choice for millennial managers demanding reliable, unobtrusive cooling solutions.

Specifications

ASIN	B071FNHVXN
Best Sellers Rank	#38,320 in Computers ( See Top 100 in Computers ) #282 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 (938)
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

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.