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Small black 40 mm square fan with four-pin connector

OEM Industries

OEM Industries MGT4012UB-W28 40 mm 4-pin fan

SKU CH-Y101-584DK

A 40 mm ball-bearing fan with a 4-pin PWM connector for case or cabinet cooling

  • Fan size40 mm
  • Bearing designBall
  • Power input connector4 Pin
  • Product colorBlack
  • Product typeFan only
  • 40 mm compact size fits tight case spaces
  • Ball bearing design supports long running life
  • 4-pin PWM connector enables precise speed control
  • 12 V 0.55 A rating keeps power draw low
  • Black frame blends with most build aesthetics

40 mm 4-pin cooling fan

The OEM Industries MGT4012UB-W28 is a 40 mm fan designed for case or cabinet cooling. It suits builders who need a compact airflow solution for tight spaces or small-form-factor systems.

Ball-bearing build with 4-pin PWM control

A ball bearing supports durable rotation while the 4-pin connector enables pulse-width-modulation speed control. The black frame blends into dark chassis interiors and the 12 V 0.55 A rating fits standard motherboard headers.

Fan-only package with no lighting

No LEDs are included, keeping the unit suitable for stealth builds or professional environments. The package contains only the fan itself, so mounting screws or adapters must be sourced separately. Buyers who want RGB illumination or bundled mounting hardware should look elsewhere.

How it compares

Measured against everything we stock in CPU Coolers & Heatsink Fans, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 70% of the 1,559 comparable items (median $19.99).
Fan size 40 mm
Lower than about 90% of the 812 comparable items (median 80 mm).

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Specifications

Product
Model nameMGT4012UB-W28
Product colorBlack
Product typeFan only
Power
Power input connector4 Pin
Size & build
Fan size40 mm
Bearing designBall
More details
LED lightingNo

Questions about this item

How does the 4-pin connector control fan speed on this 12 V model?

The 4-pin PWM connector lets the motherboard vary the 12 V supply to the 0.55 A motor, so speed scales with temperature without voltage drops.

Will the 40 mm frame fit a standard 40 mm mounting pattern?

Yes, the 40 mm square frame matches the common 40 mm hole spacing used on many small-form-factor cases and heatsinks.

What is the correct orientation when installing the ball-bearing fan?

Mount it so the label side faces the airflow direction you want; reversing it pulls air the wrong way and is the most common mistake.

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