--- 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: "1.85 DT" currency: TND in_stock: false reviews_count: 5 url: https://www.desertcart.tn/products/515277473-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual store_origin: TN region: Tunisia --- # 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:** 1.85 DT **Availability:** ❌ Out of 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?** 1.85 DT with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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: They move air ! - 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: Powerful fan to cool a powerful rc car - Works great and puts out a very nice amount of air. I use this fan to cool the esc on my 6s 1/7 arrma Mojave and it has taken the temps down from 140f+ on a 70f day to no more than 114f. I no longer have to let the esc cool down it has yet to even reach 120f with this fan. The only downsides are you have to find a way to connect it to a power source and the volume is loud. I chose pwm to usb with 5v step up in line and a 10000mah power bank this works wonders and allows me to keep the fan at whatever speed i want. In terms of volume it doesn't bother me its on a car that makes much more noise than the fan when its moving but if you're planning on using it for a server or anything indoors make sure you need this much air and/or don't care about loud fans. ## 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 | | Brand | OHMITCL | | Compatible Devices | Server | | Cooling Method | Air | | Cooling method | Air | | Customer Reviews | 4.4 out of 5 stars 66 Reviews | | Item Dimensions L x W x H | 40L x 28W x 40H millimetres | | Manufacturer | COCO | | Manufacturer Part Number | C0149 | | Material | Plastic | | Max Rotational Speed | 15000 RPM | | Model Number | C0149 | | Noise Level | 54 Decibels | | Power Connector Type | 4-Pin | | Power connector type | 4-Pin | | Product dimensions | 40L x 28W x 40H millimetres | | UPC | 730709034418 | | Unit Count | 1.0 count | | 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 ### ⭐⭐⭐⭐⭐ They move air ! *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 ### ⭐⭐⭐⭐⭐ Powerful fan to cool a powerful rc car *by T***. on 4 April 2026* Works great and puts out a very nice amount of air. I use this fan to cool the esc on my 6s 1/7 arrma Mojave and it has taken the temps down from 140f+ on a 70f day to no more than 114f. I no longer have to let the esc cool down it has yet to even reach 120f with this fan. The only downsides are you have to find a way to connect it to a power source and the volume is loud. I chose pwm to usb with 5v step up in line and a 10000mah power bank this works wonders and allows me to keep the fan at whatever speed i want. In terms of volume it doesn't bother me its on a car that makes much more noise than the fan when its moving but if you're planning on using it for a server or anything indoors make sure you need this much air and/or don't care about loud fans. ### ⭐⭐⭐⭐⭐ Big difference from stock single bearing *by D***N on 27 June 2024* Spins up faster ## 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.tn/products/515277473-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual](https://www.desertcart.tn/products/515277473-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-23*