---
product_id: 508765965
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: "9313 kr"
currency: ISK
in_stock: true
reviews_count: 5
category: "Wathai"
url: https://www.desertcart.is/products/508765965-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless
store_origin: IS
region: Iceland
---

# 6000 RPM high-speed spin 12V power for versatile electronics 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:** 9313 kr
**Availability:** ✅ In Stock

## Summary

> 🆒 Keep your tech chill and your workflow unstoppable!

## 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?** 9313 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/508765965-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

- • **Optimized Airflow:** 7.85 CFM airflow keeps your PSU, NAS, or 3D printer running cool under pressure
- • **Compact Powerhouse:** 40x40x20mm size fits perfectly in tight tech spaces
- • **Whisper-Quiet Cooling:** Operates at just 26dBA—cool your gear, not your ears
- • **Plug & Play Versatility:** Standard 12V DC with XH2.54-2Pin connector for easy DIY upgrades
- • **Long-Lasting Reliability:** Dual ball bearings ensure up to 50,000 hours of smooth operation

## Overview

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.

## 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 |
| 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) |

## Product Details

- **Air flow capacity:** 7.85 Cubic Feet Per Minute
- **Brand:** Wathai
- **Compatible devices:** Amplifier, Desktop, Gaming Console, Printer, Projector
- **Cooling method:** Air
- **Material:** Plastic
- **Maximum rotational speed:** 6000 RPM
- **Noise level:** 26 Decibels
- **Power connector type:** 2-Pin
- **Product dimensions:** 40L x 40W x 20H millimetres
- **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/41ACKDdzGOL.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/41sQBiqNlRL.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/51-f9uwxQsL.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/518WnuZ6AUL.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/51LXxZCwKIL.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
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**Shop now:** [https://www.desertcart.is/products/508765965-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless](https://www.desertcart.is/products/508765965-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless)

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-02*