---
product_id: 257612024
title: "Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling"
brand: "wathai"
price: "4790 som"
currency: KGS
in_stock: true
reviews_count: 5
category: "Wathai"
url: https://www.desertcart.kg/products/257612024-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless
store_origin: KG
region: Kyrgyzstan
---

# 6000 RPM high-speed airflow Ultra-quiet 26dBA noise level Dual ball bearing for 50,000 hrs lifespan Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling

**Brand:** wathai
**Price:** 4790 som
**Availability:** ✅ In Stock

## Summary

> 🌀 Stay cool, stay ahead — power your tech with silent precision!

## Quick Answers

- **What is this?** Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling by wathai
- **How much does it cost?** 4790 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/257612024-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless)

## Best For

- wathai enthusiasts

## Why This Product

- Trusted wathai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Efficient Airflow:** Delivers 7.85 CFM airflow at 12V, balancing powerful cooling with energy efficiency.
- • **Compact Powerhouse:** 40x40x20mm size fits seamlessly into tight spaces for versatile DIY and replacement needs.
- • **Whisper-Quiet Cooling:** Operates at a subtle 26dBA, perfect for noise-sensitive environments like home offices and studios.
- • **Plug & Play Convenience:** Includes mounting screws and a 20cm cable with standard XH2.54-2Pin connector for hassle-free installation.
- • **Long-Lasting Reliability:** Dual ball bearing design ensures a robust 50,000-hour lifespan, keeping your devices cool and running longer.

## Overview

The Wathai 40mm x 20mm 12V dual ball bearing brushless cooling fan offers a compact, high-speed 6000 RPM airflow solution with ultra-quiet 26dBA operation. Designed for PSU replacements and small electronics like 3D printers, NAS, and DVRs, it boasts a durable 50,000-hour lifespan and comes ready with mounting hardware and a 20cm connector cable for easy DIY upgrades.

## Description

Package include: 1 Piece fan and mounting screws & nuts Size:40x40x20mm Rated Voltage:12V Rated Current: 0.05A Connecter: XH2.54-2Pin Power: 0.7W Speed: 6000RPM Air flow: 7.85CFM Noise:26dBA Bearing type: Dual ball Bearing Cable Length: 20cm Or 8 inches Life: 50000 hours Weight:22g/pcs or 0.78oz

Review: 案外静音。 風力は強くはないが、弱くもない。
Review: 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.

## Features

- 40x20mm size fan for replacing fans in inverter and storage equipmentcs such as PSU，battery charger, 3D printer, switches, NAS , DVRs etc
- The 40mm DC brushless fan operates at 12V, ideal for cooling electronic equipment. This compact 40x40x20 12V fan ensures efficient cooling for various electronics, making it a reliable choice for 12V cooling needs
- Dual ball bearing providing reliable performance for prolonged periods with a lifespan of 50,000 hours
- Rated Voltage:12V 0.05A; Speed: 6000RPM; Air flow: 7.85CFM; Noise:26dBA; Connecter: XH2.54-2Pin; Cable Length: 20cm Or 8 inche
- 1 Piece fan and mounting screws & nuts; Dimension: 40mm(L) x 40mm(W) x 20mm(H) / 1.58x1.58x0.79 in. per fan

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07PYWVPMY |
| Best Sellers Rank | #67,790 in Computers ( See Top 100 in Computers ) #558 in Computer Case Fans |
| Item model number | 4020B12V2P2.5 |
| Manufacturer | Wathai |
| Product Dimensions | 4.01 x 4.01 x 2.01 cm; 22.11 g |

## Product Details

- **Brand:** Wathai
- **Cooling method:** fan cooling
- **Power connector type:** 2-Pin
- **Product dimensions:** 40L x 40W x 20H millimeters
- **Voltage:** 12 Volts (DC)

## Images

![Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling - Image 1](https://m.media-amazon.com/images/I/61hfGa4JKqL.jpg)
![Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling - Image 2](https://m.media-amazon.com/images/I/71uuSV4Lf+L.jpg)
![Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling - Image 3](https://m.media-amazon.com/images/I/71Q8Bp-iroL.jpg)
![Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling - Image 4](https://m.media-amazon.com/images/I/71m01FFpIqL.jpg)
![Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling - Image 5](https://m.media-amazon.com/images/I/71O+eNucSaL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by た***坊 on 7 December 2025*

案外静音。 風力は強くはないが、弱くもない。

### ⭐⭐⭐⭐⭐ Review
*by A***C on 2 May 2025*

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.

### ⭐⭐⭐⭐⭐ Review
*by S***N on 22 January 2026*

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.

## Frequently Bought Together

- Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling
- Coolerguys 12v Ultra Quiet Fan for Pi Devices, 3D Printers, and Microelectronics (40x20mm)
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**Shop now:** [https://www.desertcart.kg/products/257612024-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless](https://www.desertcart.kg/products/257612024-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless)

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-03-08*