How can I use this fan with a 2 pin connection. I’ve just received it only to find my connection is 2 pin. Doh!

Black is (-), red is (+) and yellow is just the probe. You disconnect/cut the yellow one and you have two active wires.

You replaced Hikvision nvr fan with Noc 40x20. What voltage did u use 12 or 5?

This Noctua fan is rated 5V and this is the voltage to use.

has anyone tried this in a dan a4 case as a top fan? And would it be worth doing?

I don't know where it would fit at the top of the A4, as the riser cables and psu cable take up the space, there might just be enough space on the GPU side. I have this fan zip-tied to the CPU side panel.

Good day, when will this item be back in stock again?

it is https://www.amazon.co.uk/gp/offer-listing/B009NQLT0M/ref=dp_olp_new_mbc?ie=UTF8&condition=new

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

NF-A4x20 PWM

Product ID: 51055796

Details

Air flow capacity
9.4 Cubic Per
Brand
Noctua
Compatible devices
Desktop
Cooling method
forced air
Material
Fibre-glass
Maximum rotational speed
5000 RPM

🌀5000 RPM max speed

🔇Ultra-quiet 14.9 dB(A)

⚙️4-pin PWM for smart control

26282CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

Description

🌀 Cool smarter, not louder — the fan your setup deserves.

COMPACT YET MIGHTY - 40x40x20 mm size fits perfectly in tight spaces like 1U servers and network gear without compromise.
WHISPER QUIET POWER - Experience peak cooling at a barely-there 14.9 dB noise level—stay focused, stay cool.
PRECISION SPEED CONTROL - 4-pin PWM lets your system dynamically adjust fan speed for optimal airflow and energy efficiency.
AWARD WINNING AERODYNAMICS - Flow Acceleration Channels and Acoustic Optimisation deliver superior cooling with minimal noise.
ALL INCLUSIVE ACCESSORY KIT - Anti-vibration mounts, extension cables, and OmniJoin adaptors ensure seamless, hassle-free installation.

The Noctua NF-A4x20 PWM is a premium 40x40x20 mm quiet fan designed for professional-grade cooling in compact devices. Featuring a max speed of 5000 RPM, ultra-low noise of 14.9 dB(A), and 4-pin PWM for automatic speed control, it excels in 1U servers, network equipment, and electronics. Its award-winning aerodynamic design and comprehensive accessory kit make it the go-to choice for efficient, silent cooling backed by a 6-year warranty.

Specifications

ASIN	B07125KWG1
Air Flow Capacity	9.4 Cubic Metres Per Hour
Best Sellers Rank	5,442 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 50 in Thermal Management Products 122 in Fans & Cooling
Brand	Noctua
Compatible Devices	Desktop
Cooling Method	forced air
Country Of Origin	China
Customer Reviews	4.8 4.8 out of 5 stars (1,654)
Global Trade Identification Number	09010018100105
Item Dimensions L x W x H	40L x 40W x 20H millimetres
Item Highlight	High Airflow Low Noise 20mm Thick Fan, for PC and Electronics Cooling, Rich Accessory Kit, 5000rpm 4-Pin PWM
Item Weight	20 Grams
Manufacturer	Noctua
Manufacturer Part Number	NF-A4x20 PWM
Material	Fibre-glass reinforced PBT
Max Rotational Speed	5000 RPM
Model Number	NF-A4x20 PWM
Noise Level	14.9 Decibels
Number of Items	1
Number of Packs	1
Power Connector Type	4-Pin
Product Warranty	6 year manufacturer’s warranty
Unit Count	1.0 count
Voltage	12 Volts

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

Sneha T.

Received my product in pristine condition. Great service overall.

1 month 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.

26282CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews