which wire is positive?

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.

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DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Cooling Fan

DB04028B12U 40mm Fan 4cm 4028 40x40x28mm 12V 0.66A Dual Ball Bearing 4-Wire 4pin PWM Server Power Airflow Cooling Fan

Product ID: 233274468

Details

Brand
OHMITCL
Compatible Devices
Server
Cooling Method
Air
Material
Copper
Maximum Rotational Speed
15000 RPM
Noise Level
54 Decibels

⚡12V Power Efficiency

💨23.78 CFM Airflow

🔄15000 RPM Speed

$27.08

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Description

💨 Stay cool, stay ahead — power your setup with precision airflow!

SMART PWM CONTROL - 4-wire 4-pin interface enables dynamic speed adjustments for optimized thermal management.
COMPACT YET MIGHTY - Sleek 40x40x28mm size fits tight spaces without compromising on airflow or pressure.
WHISPER QUIET PERFORMANCE - Operates at a modest 54 dB, balancing powerful airflow with minimal noise disruption.
DURABILITY MEETS RELIABILITY - Double ball bearing design ensures an impressive 70,000-hour lifespan for long-term peace of mind.
PRECISION COOLING POWERHOUSE - Delivers up to 23.78 CFM airflow to keep your server running cool and efficient.

The DB04028B12U is a high-performance 40mm server cooling fan featuring a robust double ball bearing system, 12V power input, and a 4-wire PWM interface for smart speed control. It delivers up to 23.78 CFM airflow at 15000 RPM while maintaining a low noise level of 54 dB. Designed for durability with a 70,000-hour lifespan, this compact fan is ideal for professional-grade server cooling and efficient thermal management.

Specifications

ASIN	B07ZDB4FPT
Air Flow Capacity	23.78 Cubic Feet Per Minute
Best Sellers Rank	#634 in Computer Case Fans
Brand Name	OHMITCL
Compatible Devices	Server
Cooling Method	Air
Customer Reviews	4.3 4.3 out of 5 stars (66)
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 Decibels
Number of Items	1
Part Number	C0149
Power Connector Type	4-Pin
UPC	730709034418
Unit Count	1.0 Count
Voltage	12 Volts
Wattage	7.92 watts

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$27.08

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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