---
product_id: 139891103
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: "€ 20.59"
currency: EUR
in_stock: true
reviews_count: 13
category: "Wathai"
url: https://www.desertcart.com.cy/products/139891103-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless
store_origin: CY
region: Cyprus
---

# 7.85 CFM airflow for efficient cooling 50,000-hour dual ball bearing lifespan 6000 RPM high-speed rotation 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:** € 20.59
**Availability:** ✅ In Stock

## Summary

> ❄️ Stay Cool, Stay Ahead — Power Your Tech with 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?** € 20.59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/139891103-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

- • **Built to Last:** Dual ball bearings deliver a robust 50,000-hour lifespan, ensuring your devices stay cool season after season.
- • **Compact Yet Mighty:** Sized at 40x40x20mm, this fan fits seamlessly into tight spaces like NAS, DVRs, 3D printers, and more.
- • **Plug & Play Versatility:** Standard 12V 2-pin connector and included mounting hardware make upgrades and replacements effortless.
- • **Precision Cooling Power:** Turbocharge your PSU and electronics with a compact 6000 RPM fan that keeps your gear chill and reliable.
- • **Whisper-Quiet Operation:** At just 26dBA, enjoy powerful cooling without the noise—perfect for focused workspaces and home offices.

## Overview

The Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan offers high-speed 6000 RPM airflow at 7.85 CFM with ultra-quiet 26dBA noise levels. Designed for small electronic equipment like PSUs, NAS, and 3D printers, it features a durable dual ball bearing system rated for 50,000 hours of continuous operation. Compact and easy to install with included mounting hardware and a standard 2-pin connector, this fan is a reliable upgrade for efficient, long-lasting cooling.

## Description

Buy Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan for 12 Volt PSU Replacment, DIY Small Electronic Equipment Cooling: Case Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Fixed my TP-Link ER8411 - 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: Brand fan.. Works very well, quiet, decent length cord - 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!

## 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 |
| Best Sellers Rank | #280 in Computer Case Fans |
| Brand | Wathai |
| Compatible Devices | Amplifier, Desktop, Gaming Console, Printer, Projector |
| Cooling Method | fan cooling |
| Date First Available | March 22, 2019 |
| Item Weight | 0.32 ounces |
| Item model number | 4020B12V2P2.5 |
| Manufacturer | Wathai |
| Material | Plastic |
| Maximum Rotational Speed | 6000 RPM |
| Noise Level | 26 Decibels |
| Number of Items | 1 |
| Power Connector Type | 2-Pin |
| Product Dimensions | 1.56"L x 1.58"W x 0.79"H |
| UPC | 702334356395 |
| 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:** fan cooling
- **Material:** Plastic
- **Maximum Rotational Speed:** 6000 RPM
- **Noise Level:** 26 Decibels
- **Power Connector Type:** 2-Pin
- **Product Dimensions:** 1.56"L x 1.58"W x 0.79"H
- **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)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fixed my TP-Link ER8411
*by A***C on May 2, 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.

### ⭐⭐⭐⭐⭐ Brand fan.. Works very well, quiet, decent length cord
*by W***I on July 28, 2025*

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!

### ⭐⭐⭐⭐ Moves a lot of air without too much extra noise
*by M***K on February 27, 2023*

This fan was more effective than I thought it'd be. I installed it in a 3D printer, and it's so effective that I had to dial it way back from when I tried other fans of similar size and rating. I've tried other fans with similar specs and they didn't seem to move as much air as they claimed. Plus, they had rattling from bearings or maybe something else, but I don't hear that with this fan. Will you hear it? Absolutely. It's not super quiet, but no fan moving this much air in that little package will be quiet -- the point is the noise I hear is from moving air and not defective or poorly designed parts. I'm glad I found it. No ridiculously overmarketed and overpackaged (but underpowered) nonsense here. Just a more affordable and effective fan with some screws, and that's all I ever asked for.

## 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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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-02-19*