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: 515277473

Details

Brand
OHMITCL
Compatible devices
Server
Cooling method
Air
Material
Plastic
Maximum rotational speed
15000 RPM
Noise level
54 Decibels

⚡12V Power Boost

💨23.78 CFM Airflow

🔄Dual Ball Bearing Durability

Description

💨 Stay cool, stay ahead — airflow that means business.

HIGH PRESSURE AIRFLOW - Pushes 1.32 inH2O to cool even the most demanding server setups.
PRO GRADE COOLING POWER - 7.92W of efficient energy consumption delivering maximum performance.
TURBOCHARGED 15000 RPM SPIN - Experience relentless airflow that keeps your tech ice-cold under pressure.
PRECISION 4 WIRE PWM CONTROL - Seamlessly adjust fan speed for the perfect balance of power and quiet.
ROCK SOLID DUAL BALL BEARINGS - Engineered for a 70,000-hour lifespan to outlast your busiest workdays.

The DB04028B12U is a compact 40x40x28mm 12V fan featuring dual ball bearings for enhanced durability and a 4-wire PWM interface for precise speed control. Delivering up to 23.78 CFM airflow at 15000 RPM with a noise level of 54 dB, it offers powerful cooling with a long 70,000-hour lifespan, ideal for high-performance servers and demanding electronics.

Specifications

ASIN	B07ZDB4FPT
Air Flow Capacity	23.78 Cubic Feet Per Minute
Brand	OHMITCL
Compatible Devices	Server
Cooling Method	Air
Cooling method	Air
Customer Reviews	4.4 out of 5 stars 66 Reviews
Item Dimensions L x W x H	40L x 28W x 40H millimetres
Manufacturer	COCO
Manufacturer Part Number	C0149
Material	Plastic
Max Rotational Speed	15000 RPM
Model Number	C0149
Noise Level	54 Decibels
Power Connector Type	4-Pin
Power connector type	4-Pin
Product dimensions	40L x 28W x 40H millimetres
UPC	730709034418
Unit Count	1.0 count
Voltage	12 Volts
Wattage	7.92 watts

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