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Noctua NF-A4x20 12V Case Fan 40mm (5000rpm / 5.53cfm) Without LED Lighting and 4-Pin PWM Connection Brown
Case Fans

Noctua NF-A4x20 12V Case Fan 40mm (5000rpm / 5.53cfm) Without LED Lighting and 4-Pin PWM Connection Brown

Noctua NF-A4x20 PWM

  • Type: Fan
  • Fan Diameter: 4 cm
  • Rotation Speed (min): 1200 RPM
  • Rotation Speed (max): 5000 RPM

Noctua NF-A4x20 PWM

  • Type: Fan
  • Fan Diameter: 4 cm
  • Rotation Speed (min): 1200 RPM
  • Rotation Speed (max): 5000 RPM
See full description See full description
Product report

Description

Description

Noctua NF-A4x20 PWM

  • Type: Fan
  • Fan Diameter: 4 cm
  • Rotation Speed (min): 1200 RPM
  • Rotation Speed (max): 5000 RPM

Manufacturer

Manufacturer Details

Warnings & Safety Information
See full description

Specifications

Specifications

Main Specifications

Dimension
40 mm

Dimension

The diameter of the fan in millimeters. The larger the fan, the more effective the cooling and the quieter its operation compared to a smaller one. The most common size is 120mm, with some computer cases supporting larger sizes such as 140mm.
Colour
Brown
Packaging
1 pcs

Technical Specifications

Fan Speed (Max)
5000 rpm

Fan Speed (Max)

The maximum rotations at which the fan turns. To reduce the rotations, it should be connected to a speed controller, either through a port on the motherboard that supports this function. Usually, the higher the rotations, the greater the flow but also the noise. As long as the needs for noise and air flow are covered, the rotations do not need to be taken into account.
Noise Level (Max)
14.9 dB

Noise Level (Max)

The noise produced by the fan when operating at maximum speed.

A medium noise fan produces 20-28dB, while those below 20dB are considered quiet.
Air Flow (Max)
5.53 cfm

Air Flow (Max)

The amount of air that the fan can push in one minute (cubic feet per minute) when operating at maximum speed.

The higher the number, the more effective the cooling that the fan can provide.

Higher quality fans can produce the same airflow with less noise and speed.
Connection
4-Pin PWM

Connection

4-Pin PWM
Plug for connecting the fan to the motherboard with the ability to control the fan speed. Usually used for cooling the processor. 2. It can also be connected to a 3-Pin socket but will always operate at maximum speed.
LED Color
Without LEDs
Reverse Blade
No

Reverse Blade

Reverse blade fans reverse the airflow, allowing for intake without the interference of the frame, which reduces aerodynamic turbulence and noise. Additionally, apart from enhancing aesthetics and lighting, they make it easier to clean the blades and offer better cable management, as the wiring remains hidden behind the frame.
Air Pressure
2.26 mmH₂O: millimeters of water

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

See all specifications

Reviews (33)

Reviews

4.8
33
4.8
Review this product
  1. 29
  2. 3
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1
Review this product
  • Construction quality
  • Silent
  • Effective cooling
  • Air flow
  • Value for money

Reviews photos

Reviews photos
Reviews photos
Reviews photos

Reviews by our members

  • Konstantinos_Kountouras6483
    5
    Konstantinos_Kountouras6483

    Verified purchase

    This review is about a variation of the product

    It's Noctua, it's worth it if you want to switch to a device with a 40mm fan without it sounding like a turbo-jet airplane taking off

    Translated from Greek ·
    Did you find this review helpful?
  • pavlandr1
    5
    pavlandr1

    Verified purchase

    You forget that there is a fan! It is so quiet! Also, extremely excellent accompanying components (connectors-extension cable etc).

    Translated from Greek ·
    Did you find this review helpful?
  • Xris_Kava
    5
    3 out of 3 members found this review helpful
    Xris_Kava
    This review is about a variation of the product

    I got it in combination with the Noctua 24 to 12 V adapter for my 3D printer. Huge difference in noise. It also comes with a port with plain cables and 4 omnijoin connections to easily connect it without soldering and tinning.

    Very good purchase!

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • nikosdion29
    5
    1 out of 1 members found this review helpful
    nikosdion29

    Verified purchase

    This review is about a variation of the product

    Classic quality and silent construction from Noctua. I put three in a rackable Synology NAS. The stock fans made it sound like a plane taking off. With the Noctua fans, it is relatively silent, I hear more the heads of the disks than the fans.

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • Krits
    5
    4 out of 4 members found this review helpful
    Krits

    Verified purchase

    There was a change of fans in a USW Enterprise 24 POE and from not being able to stand near it with the mama fans, now it is silent. The best

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • Comfuzio13
    4
    2 out of 2 members found this review helpful
    Comfuzio13

    Verified purchase

    This review is about a variation of the product

    I got it for a 3com switch, yes it is quieter than the factory one but I can still hear it and since I have it in my room, the sound is annoying at night.
    Compared to the default, it is much better.
    As for the pros, the packaging was excessive and it had all the extra goodies inside

    Translated from Greek ·
    • Effective cooling
    • Air flow
    • Construction quality
    • Value for money
    • Moderate noise
    Did you find this review helpful?
  • -NoLimits-
    1
    2 out of 9 members found this review helpful
    -NoLimits-

    Verified purchase

    Disappointing little fan. Very mediocre airflow even at 5000rpm. I was swayed by the reviews here. However, it seems quite good in terms of build quality. But for airflow behind graphics cards or generally on chips, I would not recommend it.

    Translated from Greek ·
    • Silent
    • Construction quality
    • Ineffective cooling
    • Air flow
    • Value for money
    Did you find this review helpful?
  • Kalashnik762
    5
    4 out of 5 members found this review helpful
    Kalashnik762

    Verified purchase

    Very quiet small fan max: 5660 rpm. The M.2 is very cool now with this fan. It is worth a lot

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • GeorgeMT
    5
    10 out of 11 members found this review helpful
    GeorgeMT

    I bought 2 of these to do a modding on my case! Well, the fans have amazing capabilities!!! First of all, I run both of them at 3,500 RPM and you can't hear anything at all, no noise!! At 5,000 RPM, which is the MAX, they produce a little noise which of course comes from the air they are moving - not from their motor! The motor is completely silent even then. They are very small in size (4x4cm) - about the size of a matchbox but they look a bit thick (2cm) due to their small dimensions. Very good airflow even at 3,500 RPM that I run them!! The package includes incredible accessories: Low-Noise adaptor, Y-Cable (NA-YC1) splitter, OmniJoin Adaptors, Extension cable, anti-vibration mounts, and screws (nickel). They are truly premium fans as the packaging states!

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • 5
    Jeroen_van_Eekeres

    Verified purchase

    The super silent small fan I always wanted.

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    achilleus_m

    Verified purchase

    Silent up to 3000 RPM. Only Noctua.

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • 5
    1 out of 1 members found this review helpful
    Yiannis_Katsieris

    Verified purchase

    This review is about a variation of the product

    The best in its kind

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • 5
    2 out of 3 members found this review helpful
    Comedy_Therapy
    This review is about a variation of the product

    Lots of air and incredibly quiet!!
    Buy it!!

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • 5
    vTtL^q

    Verified purchase

  • 5
    lelekis_savvas

    Verified purchase

    This review is about a variation of the product

  • 5
    Λαυρέντης

    Verified purchase

  • 5
    Kostas Sarakinos

    Verified purchase

  • 5
    epp1907

    Verified purchase

    This review is about a variation of the product

  • 5
    orfpit

    Verified purchase

    This review is about a variation of the product

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    krotsios

    Verified purchase

    This review is about a variation of the product

  • 5
    sinonick

    Verified purchase

    This review is about a variation of the product

  • 5
    Dimosthenis1234

    Verified purchase

    This review is about a variation of the product

  • 5
    Dimitris Lygkonis

    Verified purchase

  • 5
    Ioannis_Chatzis79

    Verified purchase

    This review is about a variation of the product

  • 5
    Mousketopoutso

    Verified purchase

    This review is about a variation of the product

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    Tasos T.

    Verified purchase

    This review is about a variation of the product

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    George_Stavropoulos4149

    Verified purchase

    This review is about a variation of the product

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    gfrouits

    Verified purchase

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    dimi.p

    Verified purchase

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 4
    lazaros_kalimeris4133

    Verified purchase

    • Effective cooling
    • Silent
    • Construction quality
    • Value for money
    • Air flow
  • Konstantinos_Kountouras6483
    5
    Konstantinos_Kountouras6483

    It's Noctua, it's worth it if you want to switch to a device with a 40mm fan without it sounding like a turbo-jet airplane taking off

    Translated from Greek ·
    0
  • pavlandr1
    5
    pavlandr1

    You forget that there is a fan! It is so quiet! Also, extremely excellent accompanying components (connectors-extension cable etc).

    Translated from Greek ·
    0
  • Xris_Kava
    5
    Xris_Kava

    I got it in combination with the Noctua 24 to 12 V adapter for my 3D printer. Huge difference in noise. It also comes with a port with plain cables and 4 omnijoin connections to easily connect it without soldering and tinning.

    Very good purchase!

    Translated from Greek ·
    3
  • nikosdion29
    5
    nikosdion29

    Classic quality and silent construction from Noctua. I put three in a rackable Synology NAS. The stock fans made it sound like a plane taking off. With the Noctua fans, it is relatively silent, I hear more the heads of the disks than the fans.

    Translated from Greek ·
    1
  • Krits
    5
    Krits

    There was a change of fans in a USW Enterprise 24 POE and from not being able to stand near it with the mama fans, now it is silent. The best

    Translated from Greek ·
    4
  • See all

Description & Specifications

Noctua NF-A4x20 PWM

  • Type: Fan
  • Fan Diameter: 4 cm
  • Rotation Speed (min): 1200 RPM
  • Rotation Speed (max): 5000 RPM

Manufacturer

Manufacturer Details

Warnings & Safety Information

Main Specifications

Dimension
40 mm

Dimension

The diameter of the fan in millimeters. The larger the fan, the more effective the cooling and the quieter its operation compared to a smaller one. The most common size is 120mm, with some computer cases supporting larger sizes such as 140mm.
Colour
Brown
Packaging
1 pcs

Technical Specifications

Fan Speed (Max)
5000 rpm

Fan Speed (Max)

The maximum rotations at which the fan turns. To reduce the rotations, it should be connected to a speed controller, either through a port on the motherboard that supports this function. Usually, the higher the rotations, the greater the flow but also the noise. As long as the needs for noise and air flow are covered, the rotations do not need to be taken into account.
Noise Level (Max)
14.9 dB

Noise Level (Max)

The noise produced by the fan when operating at maximum speed.

A medium noise fan produces 20-28dB, while those below 20dB are considered quiet.
Air Flow (Max)
5.53 cfm

Air Flow (Max)

The amount of air that the fan can push in one minute (cubic feet per minute) when operating at maximum speed.

The higher the number, the more effective the cooling that the fan can provide.

Higher quality fans can produce the same airflow with less noise and speed.
Connection
4-Pin PWM

Connection

4-Pin PWM
Plug for connecting the fan to the motherboard with the ability to control the fan speed. Usually used for cooling the processor. 2. It can also be connected to a 3-Pin socket but will always operate at maximum speed.
LED Color
Without LEDs
Reverse Blade
No

Reverse Blade

Reverse blade fans reverse the airflow, allowing for intake without the interference of the frame, which reduces aerodynamic turbulence and noise. Additionally, apart from enhancing aesthetics and lighting, they make it easier to clean the blades and offer better cable management, as the wiring remains hidden behind the frame.
Air Pressure
2.26 mmH₂O: millimeters of water

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews (33)

4.8
33
4.8
Review this product
  1. 29
  2. 3
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1
Review this product
  • Construction quality
  • Silent
  • Effective cooling
  • Air flow
  • Value for money

Reviews photos

Reviews photos
Reviews photos
Reviews photos

Reviews by our members

  • Konstantinos_Kountouras6483
    5
    Konstantinos_Kountouras6483

    Verified purchase

    This review is about a variation of the product

    It's Noctua, it's worth it if you want to switch to a device with a 40mm fan without it sounding like a turbo-jet airplane taking off

    Translated from Greek ·
    Did you find this review helpful?
  • pavlandr1
    5
    pavlandr1

    Verified purchase

    You forget that there is a fan! It is so quiet! Also, extremely excellent accompanying components (connectors-extension cable etc).

    Translated from Greek ·
    Did you find this review helpful?
  • Xris_Kava
    5
    3 out of 3 members found this review helpful
    Xris_Kava
    This review is about a variation of the product

    I got it in combination with the Noctua 24 to 12 V adapter for my 3D printer. Huge difference in noise. It also comes with a port with plain cables and 4 omnijoin connections to easily connect it without soldering and tinning.

    Very good purchase!

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • nikosdion29
    5
    1 out of 1 members found this review helpful
    nikosdion29

    Verified purchase

    This review is about a variation of the product

    Classic quality and silent construction from Noctua. I put three in a rackable Synology NAS. The stock fans made it sound like a plane taking off. With the Noctua fans, it is relatively silent, I hear more the heads of the disks than the fans.

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • Krits
    5
    4 out of 4 members found this review helpful
    Krits

    Verified purchase

    There was a change of fans in a USW Enterprise 24 POE and from not being able to stand near it with the mama fans, now it is silent. The best

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • Comfuzio13
    4
    2 out of 2 members found this review helpful
    Comfuzio13

    Verified purchase

    This review is about a variation of the product

    I got it for a 3com switch, yes it is quieter than the factory one but I can still hear it and since I have it in my room, the sound is annoying at night.
    Compared to the default, it is much better.
    As for the pros, the packaging was excessive and it had all the extra goodies inside

    Translated from Greek ·
    • Effective cooling
    • Air flow
    • Construction quality
    • Value for money
    • Moderate noise
    Did you find this review helpful?
  • -NoLimits-
    1
    2 out of 9 members found this review helpful
    -NoLimits-

    Verified purchase

    Disappointing little fan. Very mediocre airflow even at 5000rpm. I was swayed by the reviews here. However, it seems quite good in terms of build quality. But for airflow behind graphics cards or generally on chips, I would not recommend it.

    Translated from Greek ·
    • Silent
    • Construction quality
    • Ineffective cooling
    • Air flow
    • Value for money
    Did you find this review helpful?
  • Kalashnik762
    5
    4 out of 5 members found this review helpful
    Kalashnik762

    Verified purchase

    Very quiet small fan max: 5660 rpm. The M.2 is very cool now with this fan. It is worth a lot

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • GeorgeMT
    5
    10 out of 11 members found this review helpful
    GeorgeMT

    I bought 2 of these to do a modding on my case! Well, the fans have amazing capabilities!!! First of all, I run both of them at 3,500 RPM and you can't hear anything at all, no noise!! At 5,000 RPM, which is the MAX, they produce a little noise which of course comes from the air they are moving - not from their motor! The motor is completely silent even then. They are very small in size (4x4cm) - about the size of a matchbox but they look a bit thick (2cm) due to their small dimensions. Very good airflow even at 3,500 RPM that I run them!! The package includes incredible accessories: Low-Noise adaptor, Y-Cable (NA-YC1) splitter, OmniJoin Adaptors, Extension cable, anti-vibration mounts, and screws (nickel). They are truly premium fans as the packaging states!

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • 5
    Jeroen_van_Eekeres

    Verified purchase

    The super silent small fan I always wanted.

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    achilleus_m

    Verified purchase

    Silent up to 3000 RPM. Only Noctua.

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • 5
    1 out of 1 members found this review helpful
    Yiannis_Katsieris

    Verified purchase

    This review is about a variation of the product

    The best in its kind

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • 5
    2 out of 3 members found this review helpful
    Comedy_Therapy
    This review is about a variation of the product

    Lots of air and incredibly quiet!!
    Buy it!!

    Translated from Greek ·
    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
    Did you find this review helpful?
  • 5
    vTtL^q

    Verified purchase

  • 5
    lelekis_savvas

    Verified purchase

    This review is about a variation of the product

  • 5
    Λαυρέντης

    Verified purchase

  • 5
    Kostas Sarakinos

    Verified purchase

  • 5
    epp1907

    Verified purchase

    This review is about a variation of the product

  • 5
    orfpit

    Verified purchase

    This review is about a variation of the product

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    krotsios

    Verified purchase

    This review is about a variation of the product

  • 5
    sinonick

    Verified purchase

    This review is about a variation of the product

  • 5
    Dimosthenis1234

    Verified purchase

    This review is about a variation of the product

  • 5
    Dimitris Lygkonis

    Verified purchase

  • 5
    Ioannis_Chatzis79

    Verified purchase

    This review is about a variation of the product

  • 5
    Mousketopoutso

    Verified purchase

    This review is about a variation of the product

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    Tasos T.

    Verified purchase

    This review is about a variation of the product

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    George_Stavropoulos4149

    Verified purchase

    This review is about a variation of the product

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    gfrouits

    Verified purchase

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 5
    dimi.p

    Verified purchase

    • Effective cooling
    • Silent
    • Air flow
    • Construction quality
    • Value for money
  • 4
    lazaros_kalimeris4133

    Verified purchase

    • Effective cooling
    • Silent
    • Construction quality
    • Value for money
    • Air flow
  • Konstantinos_Kountouras6483
    5
    Konstantinos_Kountouras6483

    It's Noctua, it's worth it if you want to switch to a device with a 40mm fan without it sounding like a turbo-jet airplane taking off

    Translated from Greek ·
    0
  • pavlandr1
    5
    pavlandr1

    You forget that there is a fan! It is so quiet! Also, extremely excellent accompanying components (connectors-extension cable etc).

    Translated from Greek ·
    0
  • Xris_Kava
    5
    Xris_Kava

    I got it in combination with the Noctua 24 to 12 V adapter for my 3D printer. Huge difference in noise. It also comes with a port with plain cables and 4 omnijoin connections to easily connect it without soldering and tinning.

    Very good purchase!

    Translated from Greek ·
    3
  • nikosdion29
    5
    nikosdion29

    Classic quality and silent construction from Noctua. I put three in a rackable Synology NAS. The stock fans made it sound like a plane taking off. With the Noctua fans, it is relatively silent, I hear more the heads of the disks than the fans.

    Translated from Greek ·
    1
  • Krits
    5
    Krits

    There was a change of fans in a USW Enterprise 24 POE and from not being able to stand near it with the mama fans, now it is silent. The best

    Translated from Greek ·
    4
  • See all
18,30 €
14,00 €   shipping cost