--- product_id: 515277473 title: "DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo" brand: "ohmitcl" price: "1491049₫" currency: VND in_stock: true reviews_count: 5 category: "Ohmitcl" url: https://www.desertcart.vn/products/515277473-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual store_origin: VN region: Vietnam --- # 12V Power Boost 23.78 CFM Airflow Dual Ball Bearing Durability DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo **Brand:** ohmitcl **Price:** 1491049₫ **Availability:** ✅ In Stock ## Summary > 💨 Stay cool, stay ahead — airflow that means business. ## Quick Answers - **What is this?** DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo by ohmitcl - **How much does it cost?** 1491049₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/515277473-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual) ## Best For - ohmitcl enthusiasts ## Why This Product - Trusted ohmitcl brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **High-Pressure Airflow:** Pushes 1.32 inH2O to cool even the most demanding server setups. - • **Pro-Grade Cooling Power:** 7.92W of efficient energy consumption delivering maximum performance. - • **Turbocharged 15000 RPM Spin:** Experience relentless airflow that keeps your tech ice-cold under pressure. - • **Precision 4-Wire PWM Control:** Seamlessly adjust fan speed for the perfect balance of power and quiet. - • **Rock-Solid Dual Ball Bearings:** Engineered for a 70,000-hour lifespan to outlast your busiest workdays. ## Overview The DB04028B12U is a compact 40x40x28mm 12V fan featuring dual ball bearings for enhanced durability and a 4-wire PWM interface for precise speed control. Delivering up to 23.78 CFM airflow at 15000 RPM with a noise level of 54 dB, it offers powerful cooling with a long 70,000-hour lifespan, ideal for high-performance servers and demanding electronics. ## Description Model DB04028B12U Size 40¡Á40¡Á28mm Bearing: Double ball bearing Interface 4-wire interface Voltage: 12V Current: 0.66A Power: 7.92W Operating voltage: 7.0-13.4V Speed up to 15000RPM¡À10% Radiator noise 54 dB Maximum air volume: 23.78 CFM (cubic feet per minute)=0.673 m3/min (m3/min) Maximum wind pressure: 1.32 inH2O (inch/water) = 33.65 mmH2O (mm/water) Fan life 70000 hours Review: These fans work really well !!! they move a ton of air. I put 2 of these on a Tesla P40 and they keep it really cool... of course, they are noisy, but cool = noisy. If your looking for something to move air, choose these ! really impressed Review: Excellent fan very very powerful. Very high airflow. I run this on a 4S Lipo to cool off my RC motors. ## Features - Model DB04028B12U - Bearing: Double ball bearing - Voltage: 12V - Current: 0.66A - Interface 4-wire interface ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07ZDB4FPT | | Air Flow Capacity | 23.78 Cubic Feet Per Minute | | Batteries Required? | No | | Batteries included? | No | | Customer Reviews | 4.3 4.3 out of 5 stars (58) | | Date First Available | 25 Mar. 2019 | | Item Weight | 50 g | | Item model number | C0149 | | Manufacturer | COCO | | Material | Plastic | | Noise Level | 54 Decibels | | Part number | C0149 | | Product Dimensions | 4 x 2.8 x 4 cm; 50 g | | Voltage | 12 Volts | | Wattage | 7.92 watts | ## Product Details - **Brand:** OHMITCL - **Compatible devices:** Server - **Cooling method:** Air - **Material:** Plastic - **Maximum rotational speed:** 15000 RPM - **Noise level:** 54 Decibels - **Power connector type:** 4-Pin - **Product dimensions:** 40L x 28W x 40H millimetres - **Voltage:** 12 Volts - **Wattage:** 7.92 watts ## Images ![DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo - Image 1](https://m.media-amazon.com/images/I/61tGwEiq7-L.jpg) ![DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo - Image 2](https://m.media-amazon.com/images/I/51v1+cuB-oL.jpg) ![DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo - Image 3](https://m.media-amazon.com/images/I/51EORgrbhbL.jpg) ## Questions & Answers **Q: which wire is positive?** A: Wiring is in the order: 1. GROUND - Typically Black 2. +VDC - Typically Red 3. SENSE 4. PWM Wire color can help you in identifying the starting pin number. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by C***. on 11 February 2025* These fans work really well !!! they move a ton of air. I put 2 of these on a Tesla P40 and they keep it really cool... of course, they are noisy, but cool = noisy. If your looking for something to move air, choose these ! really impressed ### ⭐⭐⭐⭐⭐ Review *by R***E on 19 January 2026* Excellent fan very very powerful. Very high airflow. I run this on a 4S Lipo to cool off my RC motors. ### ⭐⭐⭐⭐⭐ Review *by D***Y on 29 January 2022* I purchased this fan as a replacement for the one which came with ICY DOCK ToughArmor HDD enclosure. When it comes to airflow, this little guy is an absolute beast. I was controlling it via motherboard and even though it was being run at 5V (motherboard limit), I saw speeds exceeding 13000 RPM so you can imagine the speed at full rated voltage of 12V. Now for the sad part: Even at low speed < 3000 RPM, you can't be in the same room as its distractingly loud (can't even watch a movie). When its running at full speed, its like a jet engine. I had no choice but to return it. My final verdict: As long as noise is not a concern or its installed in a secluded area at home or office, this is a great fan for the price. It will do a great job in removing heat. I can't comment on the reliability and operating - life of this fan especially when it operates at such a high RPM. High RPM does take a toll on the bearing unless they are specifically designed for it. ## Frequently Bought Together - DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo - 10pcs HEPA Filters Replacement for ILIFE V3s V3s pro V5 V5s V5s Pro V5s Pro 2 V5s Plus Noisz S5 Robotic Vacuum Cleaner ILIFE V3s pro Filters ILIFE Robot Vacuum Filter - NNL DBTB0428B2G 40mm Powerful Cooling Fan for AVC 4028 12V 1A High Speed Server Fans 40 * 40 * 28mm Dual Ball Bearing 4-Wire 4Pin PWM --- ## 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.vn/products/515277473-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual](https://www.desertcart.vn/products/515277473-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-21*