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 Coo

Product ID: 233274468

Details

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

⚡12V high-voltage power

💨23.78 CFM max airflow

🔄15000 RPM max speed

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MOP$181

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Description

💨 Cool like a pro, roar like a jet.

PRO GRADE COOLING - Ideal for servers and high-demand setups craving relentless heat dissipation.
COMPACT YET MIGHTY - A sleek 40x40x28mm powerhouse that fits tight spaces without sacrificing airflow.
PRECISION PWM CONTROL - 4-wire PWM interface lets you dial in the perfect balance of performance and noise.
JET ENGINE AIRFLOW POWER - Unleash a thunderous 23.78 CFM airflow to keep your tech ice-cool under pressure.
DURABLE DUAL BALL BEARINGS - Engineered for longevity with 70,000 hours of reliable, high-speed operation.

The DB04028B12U is a compact 40mm server fan delivering up to 15000 RPM and 23.78 CFM airflow powered by a 12V, 0.66A dual ball bearing motor. Its 4-wire PWM interface enables precise speed control, while its robust design promises up to 70,000 hours of high-performance cooling, perfect for demanding professional environments where heat management is mission-critical.

Specifications

ASIN	B07ZDB4FPT
Air Flow Capacity	23.78 Cubic Feet Per Minute
Best Sellers Rank	#1,417 in Computer Case Fans
Brand Name	OHMITCL
Compatible Devices	Server
Cooling Method	Air
Customer Reviews	4.2 4.2 out of 5 stars (64)
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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MOP$181

Duties & taxes included

In stock

Sold byAmazon MacauDelivered 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 Macau.

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