SKU: 15446432318

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

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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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4.8 ★★★★★
Based on 7 reviews
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Product Reviews
A
Verified Purchase
Amazon Dot Comment
Boise, US
★★★★★ 1
Torn to shreds by a puppy.
Style: Bunny
Torn to shreds by a puppy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
A
Verified Purchase
April
Whiting, US
★★★★★ 5
So many squeakers!
Color: Squeaker Matz Gator, Size: X Large (Pack of 1)
I have 3 golden retrievers. They love this toy. While the head came off because they played tug-o-war with it, the rest has held up mostly for 5-6 months. At this point sometimes a squeaker will pop out. There are so many squeakers in this toy! However, they still use it for tug-o-war, I am surprised it has lasted this long. There is only stuffing in the head.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 9, 2026
L
Verified Purchase
L. Beck
Louisville, US
★★★★★ 5
Cute, durable toy.
Color: Squeaker Matz Gator, Size: X Large (Pack of 1)
It's about as durable as you can expect a stuffed animal to be. I have two new puppies who are still teething and they love these things. I got the Kyjen sheep mat version (it's a square shape, rather than the two rows of squeakers) for the little girl. Both dogs sleep with it in their crate and we take them on trips with us. I've gone so far as to open up the toy and replace the broken squeakers (costs about 5$ for 30 large squeakers). The rest of the toy is fine. Our german shepherd puppy absolutely loves the rattle that's located in the head of the gator as well. The rattle also helps initially getting the dog engaged with chewing on the toy rather than your clothing or furniture. Then they discover the squeakers and it's endless entertainment and a good distraction for your dogs. I haven't had any problems with the thin, decorative material that's represent the teeth, claws and back fins. It's a slightly thicker felt that's soft and flimsy. Honestly, I'm not worried about it. Even if they were to eventually chew these off, they're not a choking hazard. Our little guy has thrown up solid pieces of kibble that are larger and harder than this. Seriously now, common. The eyes are sewn into the head, so there's no risk of pulling them off and swallowing. I toss these in the washer on a gentle cycle to clean off the slobber and dirt about once every couple weeks and the squeakers are fine, though they sometimes have to dry out to be 100% functional again. It never takes long. Overall, I love the amount of squeakers just due to the breaking problem with have with single squeaker toys. Once they break, the dog loses interest. Which is also a nice way to train the dogs the difference between the non-squeaking kids toys. The dogs absolutely love this toy and wont sleep without it. When the fabric eventually wears out (not even a slight issue after a few months), I'll be buying another one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 8, 2012
D
Verified Purchase
D. Vanhoose
Battle Creek, US
★★★★★ 5
Great Toy, HUGE, small dog loves,
Color: Squeaker Matz Gator, Size: X Large (Pack of 1)
For the price this is my favorite toy! My 4 lb Chihuahua LOVES this thing. He is smaller than it by a long shot, yet he loves to parade this around, showing how big he is and can handle this huge GATOR. LOL. Friends come up to the porch, and he runs back to grab his GATOR to bring it up for them to see. Only thing with these toys - for my dog - we have several of these he loves - he cannot make them squeak. He jumps on them, chews on them, but just doesn't have the power. That being said, think about it, he loves the things, I mean LOVES. Sleeps with them, parades them out, fights with them when he's alone, has a great time - .... Evidently, it's me - I MISS THE SQUEAK! I watch him, and root for him, and every now and then (rare), I hear he got a squeak. Still, he doesn't care! So.... interactive time! I go out and play with him and Mr. GATOR, and I make it squeak, and we all have EXTRA fun. Note, my little guy is what they call an EXTREMELY AGGRESSIVE CHEWER. He chews in his sleep (kidding). He's really a tough chewer. He however, uses these more for wrestling, and attacking, and carrying around and sleeping on, etc. So none of ours have tears in them, though he does attack and chew all of it - I think these products are super wonderful, and I have to buy several more, like the hide-a-toy ones (beehive, squirrel, etc.) because I know the quality, I know my Chihuahua loves them to pieces - while he hasn't actually been able to render them in pieces! Win-win for us. You decide what your dog is like. Mine has his snoopy blanket and a huge victory in his mind over this large GATOR - his friend all day long.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 16, 2012
C
Verified Purchase
Cam D
Birmingham, US
★★★★★ 4
Great Toy, But Not Durable
Color: Squeaker Matz Gator, Size: X Large (Pack of 1)
I bought this toy for my five-month-old American Eskimo dog, and he loved it! My dog isn't a big squeaker fan, but he had so much fun with this toy. He played with it nonstop for about an hour, and it was so fun to see him enjoying his toy. Unfortunately, I had to take it away from him because after a while, he was trying to rip out the ridges that line the alligator's back. He managed to rip out two already and was working on his third. I'm afraid that out of boredom, he will try to tear off the rest of the ridges and then the alligator's teeth and claws. I think that I will have to snip off all of the small pieces before giving this toy to my dog again. Even though the toy didn't stay intact for longer than 30-45 minutes, I don't regret buying it. It instantly caught my dog's attention and kept it. This is a good toy. It has 16 squeakers and would be a good cuddle toy since it's soft and big. This toy is longer than my dog! It's about 30 inches long!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 9, 2011

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