NF-A4x20 PWM fan
12 V / 40x40x20mm

Silent 40x40x20mm fan by Noctua
  • Premium quality quiet fan
  • Designed for optimal air flow
  • Voltage: PWM
  • Dimensions: 40x40x20mm
Stock - NL: 31
$ 15.50  excl VAT In stock
Dispatches same business day!
Product Dimensions

Product description

Tired of the loud noise when working on your computer, 3D printer or any other device? This premium quality silent fan by Noctua is the perfect solution! The integrated shock absorbers and SS02 bearings will reduce the sound level and provide more stability, with a longer life-time. The 40x40x20mm dimensions ensure that it can replace most existing fans seamlessly, while the controlled airflow with only about 14.9 dBA noise produces a steady airflow of 0.16 m³/min, thanks to the well-placed grooves in the AAO (Advanced Acoustic Optimisation) frame. The PWM version has a variable turning speed and comes with a six year warranty.


General properties
sku NFA420PWM12V4P
gtin 9010018100105
mpn 19289
Type PWM
Product Dimensions 40x40x20 mm
Length 40 mm
Width 40 mm
Height 20 mm
Format A4x20
Electrical specifications
Wire length 20 cm
Operating voltage 12 V
Connector Type

Type of connector used

Molex (4 pin)
Number of ways

Number of ways in this wire

Fan properties
Type Axial
Noise Rating 14.9 dBA
Air flow - metric 0.16 m³/min
Speed 5.000 rpm
Bearing type SSO2
Variable speed (PWM)

If a fan supports PWM, it's fan speed can be controlled. This is useful for 3D print part cooling, where a different cooling may be required between layers or materials.

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