Noctua NF-A4x20 5V PWM User Manual

Dear customer,
Congratulations on choosing the Noctua NF-A4x20 5V PWM.
We from Noctua always strive to achieve superior quiet cooling performance
regardless of whether it’s a big 140mm fan or a small 40mm one.
That’s why the NF-A4x20 5V PWM sports many of the features and advanced
aerodynamic design measures of our award-winning larger models, making it
perhaps the most thoroughly optimised 40mm fan on the market.
Each Noctua fan is double checked for flawless operation by our quality control
team before it leaves the factory and I’m confident that you will be able to sense
some of the research, attention and care we’ve put into making this product.
Enjoy your NF-A4x20 5V PWM!
Yours sincerely,
Roland Mossig, Noctua CEO
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Designed in Austria, Noctua’s premium cooling
components are internationally renowned for
their superb quietness, exceptional performance
and thoroughgoing quality.
Having received more than 6000 awards and
recommendations from leading hardware
websites and magazines, Noctua’s fans and
heatsinks are chosen by more than a hundred
thousand sati sfie d cus t o m e rs around the globe.
sales@noctua.at
|
www.noctua.at
This document includes some instructions for
installing, running and cleaning your NF-A4x20 5V PWM.
Should you have any further questions, our support
team (support@noctua.at) will be glad to assist you
at any time.
Please also have a look at the regularly updated FAQs
on our website: http://www.noctua.at/faqs
This document is also available in other languages at
the following URL: http://www.noctua.at/manuals

Noctua NF-A4x20 5V PWM Specifications

General

Type	Fan
Airflow	9.4 m³/h
Fan diameter	40 mm
Suitable location	Computer case
Maximum air pressure	2.26 mmH2O
Rotational speed (max)	5000 RPM
Rotational speed (min)	1100 RPM
Noise level (high speed)	14.9 dB
Supported processor sockets	-
Mean time between failures (MTBF)	150000 h
Mounting hole pattern (WxD)	32 x 32 mm
Fan connector	4-pin
Voltage	5 V
Power consumption (typical)	0.5 W
Screws included	Yes
Harmonized System (HS) code	84733080

Weight and Dimensions

Depth	20 mm

Summary

Introduction and Welcome

Installation

Replacing Existing Fans

Guidance on replacing existing 40mm fans with new ones, using original mounting hardware.

Case Fan Installation

Instructions for mounting the fan as a case fan using supplied screws or anti-vibration mounts.

Connection

Standard and 3-Pin Headers

Connecting the 4-pin PWM fan to standard 3-pin fan headers for full speed operation.

OmniJoin Adaptor Usage

Using the OmniJoin adaptor set to connect to proprietary fan headers in devices.

Maintenance and Support

Cleaning and Maintenance

Recommendations for cleaning fans to maintain performance and notes on bearing integrity.

Warranty and Support

Information on the 6-year warranty and how to contact Noctua support for assistance.