Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)

Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)

Q: Whats the cfm of this fan?

The output, converted from 9.4 m3/h is just 5.5 cfm, very low indeed.

Q: What is the mtbf. How many hours of life can I expect from one of these?

Not sure about the Mtbf, but i purchased 2 of this in Jan 2020, and they have been running 24/7 till now with no problems. Installed them in my 2 poe+ switches

Product ID: 47568525

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Details

Product Dimensions
1.57"L x x
Brand
Noctua
Power Connector Type
3-Pin
Voltage
12 Volts
Cooling Method
Air
Compatible Devices
Desktop

🌀5000 RPM max speed

🔇Ultra-quiet 14.9 dB noise level

⚙️150,000+ hours MTTF durability

Frequently Bought Together

Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)

Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)

Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)

Description

🌀 Silent power in a compact package — cool smarter, not louder!

COMPACT YET MIGHTY - Slim 40x40x20mm design fits perfectly in 1U servers, NAS, and network gear without compromise.
PLUG PLAY CONVENIENCE - Includes anti-vibration mounts, extension cables, and OmniJoin adaptors for seamless installation.
PRECISION COOLING POWER - Turbocharge your rig with up to 5000 RPM for optimal airflow in compact spaces.
VERSATILE SPEED CONTROL - Three-speed FLX settings let you customize performance from near-silent to max airflow.
WHISPER QUIET OPERATION - Stay focused with noise levels as low as 14.9 dB—cooling that won’t interrupt your flow.

The Noctua NF-A4x20 FLX is a premium 40x40x20mm computer case fan delivering up to 5000 RPM airflow with ultra-low noise at 14.9 dB. Designed for 1U applications and network/storage devices, it features advanced acoustic optimization, three-speed control via Low-Noise Adaptors, and a robust 150,000+ hour MTTF for reliable, silent cooling in tight spaces.

Specifications

Compatible Devices	Desktop
Noise Level	14.9 dB
Maximum Rotational Speed	5000 RPM
Air Flow Capacity	9.4 CMPH
Cooling Method	Air
Power Connector Type	3-Pin
Voltage	12 Volts
Material Type	Fibre-glass reinforced PBT
Item Dimensions L x W x H	1.57"L x 0.79"W x 1.57"H

Have a Question? See What Others Asked

Whats the cfm of this fan?

14.9dba at what speed?

How many dB is this fan?

What is the mtbf. How many hours of life can I expect from one of these?

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