--- 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: "16907CFA" currency: XOF in_stock: true reviews_count: 10 category: "Ohmitcl" url: https://www.desertcart.sn/products/233274468-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual store_origin: SN region: Senegal --- # 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:** 16907CFA **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?** 16907CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/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 | #421 in Computer Case Fans | | Brand | OHMITCL | | Brand Name | OHMITCL | | Compatible Devices | Server | | Cooling Method | Air | | Customer Reviews | 4.3 out of 5 stars 68 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) ## 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. ### ⭐⭐⭐⭐ Ouch *by C***R on August 8, 2025* Moves a ton of air but its very noisy and the blades on the intake side have pointed edges that really "bite" if you accidentally touch it while running. Be very careful while its running. ## 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.sn/products/233274468-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual](https://www.desertcart.sn/products/233274468-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-08-31*