--- 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: "¥8710" currency: JPY in_stock: true category: "Wathai" url: https://www.desertcart.jp/products/508765965-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless store_origin: JP region: Japan --- # Ultra-quiet 26dBA noise level 6000 RPM high-speed cooling Dual ball bearing for 50,000 hrs durability 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:** ¥8710 **Availability:** ✅ In Stock ## Summary > ❄️ Stay cool, stay ahead — upgrade your gear with silent power! ## 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?** ¥8710 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/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 - • **Compact Powerhouse:** 40x40x20mm size fits perfectly in tight spaces for seamless PSU & electronics upgrades. - • **High-Speed Airflow:** Delivers 7.85 CFM airflow at 6000 RPM, maximizing heat dissipation for optimal device performance. - • **Plug & Play Convenience:** Comes with mounting screws and a 20cm cable with XH2.54-2Pin connector for easy installation. - • **Long-Lasting Reliability:** Dual ball bearing design ensures a robust 50,000-hour lifespan—built to keep your gear running smooth. - • **Whisper-Quiet Efficiency:** Operates at just 26dBA, keeping your workspace cool without the distracting noise. ## Overview The Wathai 40mm x 20mm 12V dual ball bearing brushless fan offers high-speed 6000 RPM airflow with ultra-quiet 26dBA operation. Designed for compact electronic cooling needs like PSU replacements and DIY projects, it boasts a durable 50,000-hour lifespan and easy installation with included mounting hardware and a 20cm connector cable. ## 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 ## 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 | 236,499 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 2,283 in Thermal Management Products 3,587 in Fans & Cooling | | Brand | Wathai | | Compatible Devices | Amplifier, Desktop, Gaming Console, Printer, Projector | | Cooling Method | Air | | Customer Reviews | 4.4 4.4 out of 5 stars (256) | | Item Dimensions L x W x H | 40L x 40W x 20H millimetres | | Item Weight | 0.78 Ounces | | Manufacturer | Wathai | | Manufacturer Part Number | 4020B12V2P2.5 | | Material | Plastic | | Max Rotational Speed | 6000 RPM | | Model Number | 4020B12V2P2.5 | | Noise Level | 26 Decibels | | Number of Items | 1 | | Number of Packs | 1 | | Power Connector Type | 2-Pin | | UPC | 702334356395 | | Unit Count | 1.0 count | | 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/51qVDOPChXL.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/51eZSTEQVzL.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. ## 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) - Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/508765965-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless](https://www.desertcart.jp/products/508765965-wathai-40mm-x-20mm-12v-dual-ball-bearing-dc-brushless) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-10*