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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Cuba, US
★★★★★ 5
No chemicals that will be harmful!
Size: 5 Fl Oz (Pack of 2), Set name: Tube - 5 oz. 2-Pack
Ordered this mineral sunscreen looking for something simple and effective, and it’s been a solid option so far. The zinc oxide formula is the main reason I went with it. It doesn’t rely on the same chemical ingredients found in a lot of other sunscreens, which is a big plus if you’re trying to avoid that. It feels like a cleaner option overall. Coverage is good. It spreads evenly and holds up well, even with some water exposure. I’ve used it outdoors for extended periods, and it does its job without needing constant reapplication. It does leave a slight white cast at first, which is pretty typical with mineral sunscreens, but it fades in as you rub it in. Not completely invisible, but manageable. After a few uses, what stood out most is that it doesn’t have a strong smell and doesn’t irritate the skin. It just works without a lot of extras. Compared to standard chemical sunscreens, this feels more straightforward and less harsh, especially for regular use. For the price, it’s a great value. You’re getting strong sun protection without the added ingredients some people try to avoid. If you’re looking for a mineral-based sunscreen that’s effective and a bit cleaner in formulation, this is a solid choice.
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Reviewed in the United States on April 19, 2026
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AZ since '03
Boise, US
★★★★★ 5
Great mineral sunscreen that actually works
Size: 5 Fl Oz (Pack of 1), Set name: Tube - 5 oz.
Blue Lizard Sensitive Mineral SPF 50 has become my daily go-to. It goes on smooth, doesn’t leave a weird white cast like some mineral sunscreens, and gives solid protection. I like that it’s 100% mineral with no harsh chemicals and has organic aloe vera in it, so my skin feels hydrated instead of dried out. No greasy feeling, no strong scent, and it holds up well even when I sweat a bit. Been using it for a few weeks now and it performs exactly how I want. Small bottle but a little goes a long way. Definitely recommend if you want a simple, effective mineral option.
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Reviewed in the United States on May 9, 2026
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Deanna Yanda
Phoenix, US
★★★★★ 5
Fabulous product! Made my skin feel soft!
Size: 5 Fl Oz (Pack of 1), Set name: Tube - 5 oz.
This product goes on smooth and a little goes a long way. I used it today for the first time and was very pleased that it held up to my sweating in the heat doing farm work! It doesn’t bother my very sensitive skin, in fact it is quite soothing. A little goes a long way. With about a quarter size amount I was able to do both arms and my face. I was outside for several hours and didn’t burn like I usually do. It is basically unscented which is nice and isn’t sticky.
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Reviewed in the United States on May 28, 2026
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Hannah
Grantham, US
★★★★★ 4
Works well and neutral scent. Has white cast.
Size: 3 Fl Oz (Pack of 1), Set name: Tube - 3 oz.
Not a bad sunscreen. I wore it yesterday at a water park, reapplied every 1-2 hours, and didn’t get burned. Works well as a sunscreen and has a very neutral scent, which I appreciate a lot. However, like most mineral sunscreens it feels a bit heavy and definitely has a white cast. I’m pretty pale and still had a hard time getting it to blend in. It’s priced well, available at many super markets, offers good protection, and the neutral scent means I will continue using it (I stopped using some other sunblocks because of the scent alone). Just know it feels heavy and has a white cast.
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Reviewed in the United States on May 31, 2026
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Catherine H.
Boise, US
★★★★★ 5
Favorite Mineral Sunscreen
Size: 5 Fl Oz (Pack of 1), Set name: Tube - 5 oz.
This is my go to mineral sunscreen. It's very effective at protecting your skin from the harsh UV rays. It great to use for any water based activities, since it stays on your skin regardless of how wet it gets. I'm also able to use it under my eyes without it irritating them. Though it does leave behind a white cast after applying, but I personally don't mind it.
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Reviewed in the United States on May 27, 2026

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