---
product_id: 233274468
title: "DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Coo"
brand: "coco"
price: "10764 Ft"
currency: HUF
in_stock: true
reviews_count: 8
category: "Coco"
url: https://www.desertcart.hu/products/233274468-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual
store_origin: HU
region: Hungary
---

# 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 Coo

**Brand:** coco
**Price:** 10764 Ft
**Availability:** ✅ In Stock

## Summary

> 💨 Unleash the airflow beast – cool smarter, not harder!

## 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 coco
- **How much does it cost?** 10764 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/233274468-db04028b12u-40mm-fan-4cm-4028-40x40x28mm-12v-0-66a-dual)

## Best For

- coco enthusiasts

## Why This Product

- Trusted coco brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** 40x40x28mm size fits tight spaces without compromising airflow power.
- • **Turbocharged Airflow:** Delivers a powerful 23.78 CFM to keep your system cool under pressure.
- • **Precision PWM Control:** 4-wire 4-pin interface enables smart speed regulation for optimized performance.
- • **High-Speed Cooling Beast:** Reaches up to 15,000 RPM for rapid heat dissipation in demanding environments.
- • **Durable Dual Ball Bearings:** Engineered for longevity with up to 70,000 hours of reliable operation.

## Overview

The DB04028B12U is a compact 40mm server fan featuring a robust dual ball bearing design and a 4-wire PWM interface for precise speed control. Operating at 12V and drawing 0.66A, it delivers an impressive airflow of 23.78 CFM at speeds up to 15,000 RPM, ensuring efficient cooling in tight spaces. With a noise level of 54 dB and a lifespan of 70,000 hours, this fan is engineered for high-performance, long-lasting thermal management in professional and industrial settings.

## 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: Great product but had to return it - 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.
Review: Lots of air - Blows a lot of air for the size. Used it to cool my electric motorcycle. No more overheating

## 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 |
| Best Sellers Rank | #820 in Computer Case Fans |
| Brand | COCO |
| Compatible Devices | Server |
| Cooling Method | Air |
| Date First Available | March 25, 2019 |
| Item Weight | 1.76 ounces |
| Item model number | C0149 |
| Manufacturer | COCO |
| Material | Copper |
| Maximum Rotational Speed | 15000 RPM |
| Noise Level | 54 Decibels |
| Power Connector Type | 4-Pin |
| Product Dimensions | 1.57"L x 1.1"W x 1.57"H |
| UPC | 730709034418 |
| Voltage | 12 Volts |
| Wattage | 7.92 watts |

## Product Details

- **Brand:** COCO
- **Compatible Devices:** Server
- **Cooling Method:** Air
- **Material:** Copper
- **Maximum Rotational Speed:** 15000 RPM
- **Noise Level:** 54 Decibels
- **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 Coo - 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

### ⭐⭐⭐⭐⭐ Great product but had to return it
*by D***Y on January 29, 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.

### ⭐⭐⭐⭐⭐ Lots of air
*by A***R on July 6, 2025*

Blows a lot of air for the size. Used it to cool my electric motorcycle. No more overheating

### ⭐⭐⭐⭐ 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

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-22*