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The Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan delivers efficient, quiet cooling with a robust 6000 RPM speed and 7.85 CFM airflow. Designed for compact electronic devices like PSUs, NAS, and 3D printers, it features a durable dual ball bearing system rated for 50,000 hours of continuous use. With a low noise level of 26dBA and easy installation via a standard 2-pin connector, this fan is the smart upgrade for professionals seeking reliable thermal management in tight spaces.






















| ASIN | B07PYWVPMY |
| Air Flow Capacity | 7.85 Cubic Feet Per Minute |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 325,301 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 3,179 in Thermal Management Products |
| Colour | 12V Ball |
| Customer Reviews | 4.4 4.4 out of 5 stars (408) |
| Date First Available | 22 Mar. 2019 |
| Item Package Quantity | 1 |
| Item Weight | 9.07 g |
| Item model number | 4020B12V2P2.5 |
| Manufacturer | Wathai |
| Material | Plastic |
| Noise Level | 26 Decibels |
| Part number | 4020B12V2P2.5 |
| Product Dimensions | 4.01 x 4.01 x 2.01 cm; 9.07 g |
| Style | 12V Ball |
| Voltage | 12 Volts (DC) |
た**坊
案外静音。 風力は強くはないが、弱くもない。
A**C
My TP-Link er8411 router suffered a broken fan in transit and these fixed it right up. I did have to reverse the black and yellow wires on the fan’s plug. Apparently TP-Link uses a standard fan connector but not a standard pinout. These fans are quiet enough. They are slightly audible when running but cannot be heard with the door to my network closet closed. Installation was simple. The fans come with mounting hardware but I just reused the hardware already in place. The quality seams decent. Not the highest quality but not the worst either.
S**N
This fan is reasonably quiet and I've used it to replace one of two aging fans in a Kobolt battery charger. The old fan rattled and squeeled as it started up and I didn't want to risk overheating the circuitry so I bought this one as a replacement and it fit perfectly. Very happy to breather new life into an otherwise expensive piece of equipment. Works great, good flow and low noise.
B**R
I bought this fan to replace an intermittently noisy one in an automotive battery charger. This fan is quieter than the original and has better bearings (ball) that I hope will last longer than the OG. It fit exactly in place, the wires reached the circuit board and the best part of all is the connector fit too. So it was pretty much literally a drop in replacement that worked perfectly on power up. I am, of course, a very happy camper.
W**I
I'm a big fan of this brand! Fans work well, aren't super loud at low rpm and keep things cool. i did have to move the pins for my install (cisco 2801) but they work flawlessly and are so much quieter than the old OEM fans!
Trustpilot
2 weeks ago
2 weeks ago