--- product_id: 233274468 title: "DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Cooling Fan" brand: "ohmitcl" price: "64.40 DT" currency: TND in_stock: true reviews_count: 10 category: "Ohmitcl" url: https://www.desertcart.tn/products/233274468-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual store_origin: TN region: Tunisia --- # 12V Power Input 23.78 CFM Airflow Up to 15000 RPM Speed DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Cooling Fan **Brand:** ohmitcl **Price:** 64.40 DT **Availability:** ✅ In Stock ## Summary > 💨 Cool your tech like a pro—because overheating is so last season! ## Quick Answers - **What is this?** DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Cooling Fan by ohmitcl - **How much does it cost?** 64.40 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/233274468-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 - • **Compact Yet Mighty:** At just 40x40x28mm, it packs serious airflow in a space-saving design perfect for servers and high-demand electronics. - • **Precision PWM Control:** 4-wire 4-pin interface lets you fine-tune fan speed for optimal performance and noise balance. - • **Powerful & Professional:** 54 dB noise level balances strong cooling with manageable sound—ideal for workstations and server rooms. - • **Durable Dual Ball Bearings:** Engineered for longevity with a 70,000-hour lifespan to keep your system running cool and reliable. - • **Turbocharged Cooling Power:** Delivers a high 23.78 CFM airflow to keep your devices chill under pressure. ## Overview The DB04028B12U is a compact 40mm server cooling fan featuring a robust 12V dual ball bearing motor capable of spinning up to 15,000 RPM. It delivers a powerful 23.78 CFM airflow with a maximum wind pressure of 1.32 inH2O, ensuring efficient heat dissipation. Designed with a 4-wire PWM interface, it offers precise speed control and a long operational life of 70,000 hours, making it a reliable choice for high-performance cooling in servers, RC vehicles, 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: 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. Review: Very powerful - 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 cfm | | Best Sellers Rank | #2,077 in Computer Case Fans | | Brand | OHMITCL | | Brand Name | OHMITCL | | Compatible Devices | Server | | Cooling Method | Air | | Customer Reviews | 4.3 out of 5 stars 70 Reviews | | Item Dimensions L x W x H | 1.57"L x 1.1"W x 1.57"H | | Manufacturer | COCO | | Material Type | Copper | | Maximum Rotational Speed | 15000 rpm | | Model | C0149 | | Noise Level | 54 db | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | C0149 | | Power Connector Type | 4-Pin | | Product Dimensions | 1.57"L x 1.1"W x 1.57"H | | UPC | 730709034418 | | Unit Count | 1 Count | | Voltage | 12 volts | | Wattage | 7.92 watts | ## Product Details - **Brand:** OHMITCL - **Compatible Devices:** Server - **Cooling Method:** Air - **Material:** Copper - **Maximum Rotational Speed:** 15000 rpm - **Noise Level:** 54 db - **Power Connector Type:** 4-Pin - **Product Dimensions:** 1.57"L x 1.1"W x 1.57"H - **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 Cooling Fan - 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 Cooling Fan - 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 Cooling Fan - 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 ### ⭐⭐⭐⭐⭐ Powerful fan to cool a powerful rc car *by T***. on April 4, 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. ### ⭐⭐⭐⭐⭐ Very powerful *by R***E on January 19, 2026* Excellent fan very very powerful. Very high airflow. I run this on a 4S Lipo to cool off my RC motors. ### ⭐⭐⭐⭐ Loud *by C***9 on August 26, 2026* Kind of loud at high speed. ## 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/233274468-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual](https://www.desertcart.tn/products/233274468-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-28*