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

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Noctua NF-A4x20 FLX, High-Performance Quiet Fan 40mm

Noctua NF-A4x20 FLX, High-Performance Quiet Fan 40mm

Product ID: 51055764

Details

Brand
Noctua
Compatible devices
Desktop
Cooling method
Air
Global Trade Identification Number
Maximum rotational speed
5000 RPM
Noise level
14.9 Decibels

⏳>150,000 h MTTF reliability

🌀5000 RPM max speed

🔇Ultra-quiet 14.9 dB(A)

€ 32.50

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Description

🌀 Silence meets power — cool smarter, not louder!

COMPACT POWERHOUSE - 40x40x20 mm size fits perfectly in 1U servers, NAS, and network gear
AWARD WINNING DESIGN - Flow Acceleration Channels & Acoustic Optimisation for elite silent performance
PLUG PLAY VERSATILITY - Comes with extension cable, OmniJoin adaptor & screws for seamless installation
VIBRATION FREE OPERATION - Includes anti-vibration mounts to keep your setup noise-free and stable
PRECISION AIRFLOW CONTROL - 3-speed FLX settings for tailored cooling or whisper-quiet operation

The Noctua NF-A4x20 FLX is a premium 40mm high-performance fan engineered for ultra-quiet, reliable cooling in compact devices like 1U servers, routers, and NAS units. Featuring a 3-speed FLX control, advanced aerodynamic design, and anti-vibration mounts, it delivers up to 5000 RPM airflow at just 14.9 dB(A) noise level, backed by a 6-year warranty and over 150,000 hours mean time to failure.

Specifications

ASIN	B071J8CZP9
Best Sellers Rank	4,117 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 40 in Thermal Management Products 99 in Fans & Cooling
Brand	Noctua
Compatible Devices	Desktop
Cooling Method	Air
Country Of Origin	China
Customer Reviews	4.8 4.8 out of 5 stars (2,605)
Global Trade Identification Number	09010018100112
Item Dimensions L x W x H	40L x 40W x 20H millimetres
Item Weight	20 Grams
Manufacturer	Noctua
Manufacturer Part Number	NF-A4x20 FLX
Max Rotational Speed	5000 RPM
Model Number	NF-A4x20 FLX
Noise Level	14.9 Decibels
Number of Items	1
Number of Packs	1
Power Connector Type	3-Pin
Product Warranty	6 year manufacturer’s warranty
Unit Count	1.0 count
Voltage	12 Volts

Common Questions

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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.

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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.

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TrustScore 4.5 | 7,300+ reviews

Ayesha M.

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

5 days ago

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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€ 32.50

Duties & taxes included

In stock

Sold byAmazon GERMANYDelivered 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 GERMANY.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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