---
product_id: 139891103
title: "40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020"
brand: "wathai"
price: "¥4493"
currency: JPY
in_stock: true
category: "Wathai"
url: https://www.desertcart.jp/products/139891103-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless-cooling
store_origin: JP
region: Japan
---

# 6000 RPM high-speed cooling Ultra-quiet 26 dBA noise level Dual ball bearing for 50,000 hrs lifespan 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020

**Brand:** wathai
**Price:** ¥4493
**Availability:** ✅ In Stock

## Summary

> 🌀 Stay cool, stay ahead — power your gear with precision airflow!

## Quick Answers

- **What is this?** 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020 by wathai
- **How much does it cost?** ¥4493 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/139891103-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless-cooling)

## 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 to keep your devices running cooler and longer under pressure.
- • **Compact Powerhouse:** 40x40x20mm size fits perfectly in tight spaces for seamless PSU & electronics cooling.
- • **Plug & Play Convenience:** 2-pin XH2.54 connector with 20cm cable for easy installation and quick replacement.
- • **Whisper-Quiet Operation:** At just 26 dBA, keep your workspace cool without the distracting fan noise.
- • **Long-Lasting Reliability:** Dual ball bearing design ensures up to 50,000 hours of consistent, maintenance-free performance.

## Overview

The Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan is engineered for compact electronic cooling needs. Operating at 6000 RPM with a quiet 26 dBA noise level, it delivers 7.85 CFM airflow to efficiently cool devices like PSUs, 3D printers, and NAS units. Its durable dual ball bearing design guarantees up to 50,000 hours of reliable performance, making it an ideal upgrade or replacement fan for professionals demanding silent, long-lasting cooling solutions.

## Description

Buy Wathai 40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020 | DC 12 Volt Fan 40mm for PSU Replacment, DIY Small Electronic Equipment Cooling: Case Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## 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 cfm |
| Best Sellers Rank | #510 in Computer Case Fans |
| Brand | Wathai |
| Brand Name | Wathai |
| Compatible Devices | Amplifier, Desktop, Gaming Console, Printer, Projector |
| Cooling Method | fan cooling |
| Customer Reviews | 4.5 out of 5 stars 277 Reviews |
| Item Dimensions L x W x H | 1.56"L x 1.58"W x 0.79"H |
| Item Highlight | DC 12 Volt Fan 40mm for PSU Replacment, DIY Small Electronic Equipment Cooling |
| Item Weight | 22.14 g |
| Manufacturer | Wathai |
| Material Type | Plastic |
| Maximum Rotational Speed | 6000 rpm |
| Model | 4020B12V2P2.5 |
| Noise Level | 26 db |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 4020B12V2P2.5 |
| Power Connector Type | 2-Pin |
| Product Dimensions | 1.56"L x 1.58"W x 0.79"H |
| UPC | 702334356395 |
| Unit Count | 1 Count |
| Voltage | 12 volts_of_direct_current |

## Product Details

- **Air Flow Capacity:** 7.85 cfm
- **Brand:** Wathai
- **Compatible Devices:** Amplifier, Desktop, Gaming Console, Printer, Projector
- **Cooling Method:** fan cooling
- **Material:** Plastic
- **Maximum Rotational Speed:** 6000 rpm
- **Noise Level:** 26 db
- **Power Connector Type:** 2-Pin
- **Product Dimensions:** 1.56"L x 1.58"W x 0.79"H
- **Voltage:** 12 volts_of_direct_current

## Images

![40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020 - Image 1](https://m.media-amazon.com/images/I/61hfGa4JKqL.jpg)
![40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020 - Image 2](https://m.media-amazon.com/images/I/71uuSV4Lf+L.jpg)
![40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020 - Image 3](https://m.media-amazon.com/images/I/71Q8Bp-iroL.jpg)
![40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020 - Image 4](https://m.media-amazon.com/images/I/71m01FFpIqL.jpg)
![40mm x 20mm 12V Dual Ball Bearing DC Brushless Cooling Fan 2pin 4020 - Image 5](https://m.media-amazon.com/images/I/71O+eNucSaL.jpg)

## 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.jp/products/139891103-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless-cooling](https://www.desertcart.jp/products/139891103-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless-cooling)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-07*