I need to control the speed using arduino (the arduino has a 500 hz pwm frecuency) can this fan handle this frequency for pwm or what it is?

You can change the PWM to FAST PWM for these applications on Arduino. Googalize "25k PWM Arduino code". The real issue is trying to find data specs on the PWM IC that Noctua uses. Googalize "Noctua PWM white paper" and you'll get all the info you need on their PWM specs. Target frequency is 25kHz but the acceptable range is 21kHz to 28kHz. GOOD LUCK.

Is there a 5vdc pwm temperature controller for this fan? been searching, but can't find.

No its controlled by the motherboard. I threw away the usb adapter cable, If it was used to power the fan, since usb is 5v, I would expect it to run at full speed. I used my fan on an NVIDIA NANO Single board computer

is there a usb version of the noctua 40x20 5v fan

No, there is no USB specific version available. But the kit does include a USB Type A to 4-pin female adapter cable.

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Noctua NF-A4x10 5V PWM, High-Performance Quiet Fan 40mm

Noctua NF-A4x10 5V PWM, High-Performance Quiet Fan 40mm

Product ID: 71150027

Details

Air Flow Capacity
8.9 cubic per
Brand
Noctua
Compatible Devices
Desktop
Cooling Method
Air
Material
Fibre-glass
Maximum Rotational Speed
5000 rpm

⚡5V PWM power with USB adaptor

🌀5000 RPM max speed

🔇Ultra-quiet 19.6 dB(A)

€ 33.01

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Description

🌀 Stay cool, stay ahead — the silent fan your setup deserves!

COMPACT YET MIGHTY - Slim 40x40x10 mm design fits tight spaces without compromising on airflow performance.
PRECISION PWM CONTROL - Fine-tune fan speed effortlessly with 4-pin PWM for optimal cooling and energy efficiency.
WHISPER QUIET POWERHOUSE - Experience supreme airflow at a barely-there 19.6 dB noise level—your workspace stays cool and calm.
BUILT TO LAST VIBE FREE - Anti-vibration mounts and a 150,000-hour MTTF ensure silent, reliable cooling that keeps you ahead.
PLUG PLAY USB VERSATILITY - Power your fan anywhere with included USB adaptor—perfect for on-the-go setups and unconventional devices.

The Noctua NF-A4x10 5V PWM is a premium 40mm high-performance fan engineered for ultra-quiet operation at up to 5000 RPM. Featuring advanced acoustic optimization and Flow Acceleration Channels, it delivers efficient airflow with minimal noise (19.6 dB). Its 5V 4-pin PWM design includes polarity protection and a USB power adaptor for versatile connectivity. Compact and durable, it comes with anti-vibration mounts and a 6-year warranty, making it ideal for professional-grade electronics cooling and ventilation.

Specifications

ASIN	B07DXS86G7
Air Flow Capacity	8.9 cubic meter per hour
Best Sellers Rank	#79 in Computer Case Fans
Brand Name	Noctua
Compatible Devices	Desktop
Cooling Method	Air
Customer Reviews	4.7 4.7 out of 5 stars (1,147)
Included Components	NF-A4x10 5V PWM
Item Dimensions L x W x H	1.57"L x 1.57"W x 0.39"H
Item Highlight	High Airflow Low Noise, 5V, 10mm Slim Fan, for Ventilation and Electronics Cooling, USB-A Power Adaptor, 5000rpm 4-Pin PWM
Item Weight	80 g
Manufacturer	Noctua
Material Type	Fibre-glass reinforced PBT
Maximum Rotational Speed	5000 rpm
Model	NF-A4X10 5V PWM
Noise Level	19.6 db
Number of Items	1
Number of Packs	1
Part Number	NF-A4X10 5V PWM
Power Connector Type	4-Pin
UPC	841501110320
Unit Count	1 Count
Voltage	5 volts
Warranty Description	6 year manufacturer’s warranty

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