SKU: 15446432318

Noctua NF-A4x10-5V Quiet Cooling 40x40x10mm 5V Fan Kit

$23.40 $26.00
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Description

Noctua NF-A4x10-5V Quiet Cooling 40x40x10mm 5V Fan KitNoctua NF A4x10 5V 40mm Fan Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and an AAO standard frame, the NF A4x10 5V is a dedicated 5V version of Noctuas highly optimised, premium quality quiet 40x10mm fan. Smooth Commutation Drive technology and Noctuas reference class SSO2 guarantee superb running smoothness and excellent long term stability. Topped off with modular cabling, the OmniJoin Adaptor Set and 6 years

Noctua NF-A4x10 5V 40mm Fan

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and an AAO standard frame, the NF-A4x10 5V is a dedicated 5V version of Noctua’s highly optimised, premium quality quiet 40x10mm fan. Smooth Commutation Drive technology and Noctua’s reference class SSO2 guarantee superb running smoothness and excellent long-term stability. Topped off with modular cabling, the OmniJoin™ Adaptor Set and 6 years manufacturer’s warranty, the NF-A4x10 5V is a premium choice for demanding 5V applications.

Being a 5V fan, the NF-A4x10 5V be run at 12V and will be damaged when used with typical 12V power sources such as PC mainboard fan headers./em>

 

Noctua NF-A4x10 5V Features

Noctua NF-A4x10 5V
5V version
Many devices such as network or storage solutions use 5 40mm fans. With the same operating voltage and the included OmniJoin™ adaptor set that makes it compatible with proprietary fan headers, the NF-A4x10 5V is ideal for replacing noisy or broken 5V 40mm fans.
Flow Acceleration Channels
The NF-A4x10 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.
Reduced Motor Hub Size
Thanks to its streamlined, compact motor design, the NF-A4x10's motor hub is smaller than with conventional 4cm fans. This allows for more blade surface area and thus contributes to the NF-A4x10's superior airflow and pressure performance.
AAO Frame
Noctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan's performance/noise efficiency.

Stepped Inlet Design
Noctua's Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space restricted environments.

Inner Surface Microstructures
With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency.

Integrated Anti-Vibration Pads
Integrated Anti-Vibration Pads made from extra-soft silicone minimize the transmission of minute vibrations while maintaining full compatibility with all standard mounting systems and fan clips used on heatsinks.

Smooth Commutation Drive 2
The latest version of Noctua’s advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the NF-A4x10 remarkably quiet even at close distance.

SSO2 Bearing
The NF-A4x10 features the further optimised second generation of Noctua’s renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.
3 to 2-pin Adaptor and Polarity Protection
The NF-A4x10 comes with an adaptor from 3-pin Molex to the 2-pin connectors used on many graphics cards or network and storage devices. An integrated diode provides polarity protection on 2-pin connections.
OmniJoin Adaptor Set
Many devices featuring 40mm fans use proprietary fan headers, so the NF-A4x10 comes with Noctua's OmniJoin Adaptor Set. Just cut the original fan's cable, fix it to the adaptor using the supplied 3M Scotchlok™ connectors and you can plug the NF-A4x10 to proprietary fan headers!

Extensive Cabling Options
The fan's short 20cm primary cable minimises cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary. Both cables are fully sleeved.

6 Years Manufacturer's Warranty
Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-A4x10 features an MTBF of more than 150.000 hours rating and comes with a full 6 years manufacturer's warranty.

 

Noctua NF-A4x10 5V Specifications

Noctua NF-A4x10 5V
Size 40x40x10 mm
Connector 3-pin
Bearing SSO2
Blade Geometry A-Series with Flow Acceleration Channels
Frame Technology AAO (Advanced Acoustic Optimization)
Rotational Speed (+/- 10%) 4500 RPM
Airflow 8.2 m³/h - 4.83
Acoustical Noise 17.9 dB(A)
Acoustical Noise with L.N.A. 12.9 dB(A)
Static Pressure 1.78 mm H2O
Max. Input Power 0.25 W
Max. Input Current 0.05 A
Voltage 5V
MTBF > 150,000 h
Scope of Delivery
  • 3:2-Pin Adaptor
  • OmniJoin Adapter Set
  • 30cm Extension Cable
  • 4 Vibration-Compensators
  • 4 Fan Screws
Warranty 6 years

Looking for a replacement for your Prusa MK3S?

 

Prusa switches between two different 5v fans on their Prusa MK3S Kits.

Type B Delta Fan
Type A Noctua Fan NF-A4x10-5V
We also sell the Noctua fan in the Noctua NF-A4x10-5V Kit (this listing) direct from Noctua if these are both out of stock however you will need to solder the wires as it does not come with correct length wire/connector.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 15446432318

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Kelly Cole
Lowell, US
★★★★★ 5
Best toys for active dogs
Size: Medium/Large, Product Packaging: Standard Packaging, Size: Medium/Large, Product Packaging: Standard Packaging
My dogs love these Kong toys. I have border collies. They are active and these toys go on ever walk, out to the pasture, they carry them everywhere! We like this toy as well As the Kong ball shown in the picture. Indestructible!
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Reviewed in the United States on January 13, 2026
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dcp
Alexandria, US
★★★★★ 5
Very cute, good quality
Style: Lambchop, Size: 10", Style: Lambchop, Size: 10"
Our Two year-old Great Pyrenees rescue loves her Lambchop. She’s fairly gentle with it, but it did accidentally rip so we had replace it since she loves it so much. No fault of the product. The product is very well made, She just got a little rough with it.
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Reviewed in the United States on April 27, 2026
E
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Em
Waukegan, US
★★★★★ 5
We <3 big lambchops
Style: White, Size: 24" Jumbo, Style: White, Size: 24" Jumbo
These are my vizsla's absolute FAVORITE toy. I mean, she doesn't leave the room without bringing at least one. We've bought several of these exact toys now and they're surprisingly durable- we've even put a few through the laundry. She loves to snuggle, nibble, and carry this toy like a security blanket. These are the big ones, so they get a little discolored from her grabbing them around the belly. The squeakers are pretty few and far between so it's generally not noisy unless she's super bored or excited. Get it, your dog will love it and they're cheaper than some of the small ones.
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Reviewed in the United States on March 7, 2026
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Nahlik
Omaha, US
★★★★★ 5
A Classic Toy My Dog Can’t Get Enough Of!
Style: Blue Birthday Hat, Size: 10.5"
The Multipet Lamb Chop Dog Plush Toy (10.5”, Cream) is an absolute winner in our house! This adorable, nostalgic plush is just as cute as it is entertaining, and my dog fell in love with it the moment it came out of the package. Super Soft & Cuddly The material is extra plush and velvety, making it perfect for dogs who love to snuggle. It feels well-made and not scratchy like some cheaper toys. Squeakers That Keep Dogs Engaged There are multiple squeakers inside, and they’re loud enough to keep your dog excited but not obnoxious. My pup carries it around proudly and squeaks it nonstop. Great Size The 10.5” size is ideal for both small and medium to large dogs. Big enough to cuddle, small enough to toss around easily. Durable for a Plush Toy While it’s not built for heavy destroyers (no plush toy truly is), it holds up surprisingly well to daily play and lots of shaking. Overall: The Multipet Lamb Chop is a fantastic combo of cuddly plush and squeaky fun. Perfect for fetch, snuggles, or as your dog’s new favorite companion. If your dog enjoys plush toys, this is definitely one to grab. Highly recommended! 🐑🐶💛
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Reviewed in the United States on December 11, 2025
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Amazon Customer
Lowell, US
★★★★★ 5
BEST TOY!
Style: White, Size: 6"
I recently bought the Multipet INTERNATIONAL 843140 Lambchop Plush Squeak Toy Mini for my small dog, and it has quickly become her favorite toy. Here’s why this little squeak toy is a great addition to any pet’s collection: Adorable Design The Lambchop Plush Squeak Toy is absolutely adorable. It resembles the beloved character Lambchop, which adds a nostalgic charm for those who remember the classic TV show. The toy is well-crafted with a cute, friendly face and soft, plush material. Its small size makes it perfect for petite pets, and it’s just the right size for my dog to carry around and snuggle with. Engaging and Fun The built-in squeaker adds an extra layer of excitement for my pet. Every time she bites down, the squeak captures her attention and keeps her engaged for longer periods. It’s great for interactive play, fetch, and even as a comforting chew toy. My dog loves the noise it makes and often brings it to me to initiate playtime. Durable Construction Despite its soft and plush exterior, the Lambchop toy has proven to be quite durable. My dog is a moderate chewer, and after several weeks of play, the toy is still intact with no signs of wear and tear. The stitching is strong and has held up well against my dog’s playful bites and tugs. However, for very aggressive chewers, it might not last as long. Easy to Clean The toy is also relatively easy to clean. I’ve hand-washed it a few times to keep it fresh, and it dries quickly without losing its shape or squeak. The white color, while prone to getting dirty, can be easily spot-cleaned to maintain its appearance. Perfect Size for Small Pets At 6 inches, this toy is ideally sized for small dogs and even cats. It’s lightweight and easy for them to carry around. My dog can comfortably grip it in her mouth, and the toy is soft enough for her to cuddle with during nap time. Value for Money Considering its durability, engaging design, and the joy it brings to my pet, the Multipet Lambchop Plush Squeak Toy offers excellent value for money. It’s reasonably priced and provides hours of entertainment and comfort for my dog. Overall Impression Overall, the Multipet INTERNATIONAL 843140 Lambchop Plush Squeak Toy Mini is a fantastic toy for small pets. Its adorable design, engaging squeaker, and durable construction make it a worthwhile purchase. My dog loves it, and it has quickly become a staple in her toy collection. I highly recommend this toy to anyone looking for a cute and fun squeak toy for their small pet.
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Reviewed in the United States on June 18, 2024

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