Can someone explain how this differs from the non-pwm version? Is it just the number of wires? IF so why would one select that over the alternative?

PWM or pulse width modulation is one of several methods to control motor and hence in this case fan speed. The correct motherboard connection as noted below permits the fan speed to be modulated to increase cooling when computing loads are high and slowing the fan at other times. The only benefit being less fan noise.

Can this be mounted in place of a 50x50mm fan?

No, not unless you have room for it and can enlarge the mounting hole pattern and fan hole.

Can you convert this from 4 pin to 2 pin?

It comes with PWM to three pin adapters.... You'd have to hack up your own PWM to DC adapter

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NF-A6x25 PWM

Product ID: 14165352

Details

Air Flow Capacity
29.2 cubic per
Brand
Noctua
Compatible Devices
Desktop
Cooling Method
Air
Material
Fibre-glass
Maximum Rotational Speed
3000 rpm

⏳>150,000 hours MTTF reliability

🌀3000 RPM max speed

🔇Ultra-quiet 19.3 dB(A)

¥5626

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Description

🌀 Stay cool, stay silent, stay ahead.

BUILT TO LAST - Over 150,000 hours mean-time-to-failure ensures your system stays cool for years.
COMPACT YET MIGHTY - 60x60x25 mm size fits perfectly in tight spaces like NAS, DVRs, and 3D printers.
WHISPER QUIET POWER - Experience high airflow without the noise—only 19.3 dB(A) at peak speed.
PRECISION PWM CONTROL - Seamlessly adjust fan speed from 550 to 3000 RPM for optimal cooling and energy efficiency.
ALL INCLUSIVE ACCESSORY KIT - Includes anti-vibration mounts, extension cables, and Y-cable for dual fan setups—plug and play perfection.

The Noctua NF-A6x25 PWM is a premium 60mm high-performance fan designed for ultra-quiet, efficient cooling in compact electronics. Featuring a broad 550-3000 RPM speed range with PWM control, advanced acoustic optimization, and a robust >150,000 hour lifespan, it’s the go-to upgrade for professionals seeking reliable, whisper-quiet airflow in NAS, DVRs, 3D printers, and desktop PCs.

Specifications

ASIN	B00VXTANZ4
Air Flow Capacity	29.2 cubic meter per hour
Best Sellers Rank	#83 in Computer Case Fans
Brand Name	Noctua
Compatible Devices	Desktop
Cooling Method	Air
Customer Reviews	4.8 4.8 out of 5 stars (2,724)
Global Trade Identification Number	00842431012524, 04716123315636
Item Dimensions L x W x H	2.36"L x 2.36"W x 0.98"H
Item Highlight	High Airflow, Low Noise, 25mm Thick Fan, for PC and Electronics Cooling, Rich Accessory Kit, 3000rpm 4-Pin PWM
Item Weight	41 g
Manufacturer	Noctua
Material Type	Fibre-glass reinforced PBT
Maximum Rotational Speed	3000 rpm
Model	NF-A6x25 PWM
Noise Level	19.3 db
Number of Items	1
Number of Packs	1
Part Number	NF-A6x25 PWM
Power Connector Type	4-Pin
UPC	842431012524
Unit Count	1 Count
Voltage	12 volts
Warranty Description	6 year manufacturer’s warranty

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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¥5626

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

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Great price for an authentic product. Fast international shipping too!

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