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Small black square cooling fan 40mm by 28mm with three wires

OEM Industries

OEM Industries 109P0412G3D073 40mm 12V 0.31A 3-pin CPU cooler

SKU CH-H9JX-K21SS

A 40 mm square SANYO fan with 12 V 0.31 A three-pin power for compact CPU cooling

  • Fan size40 mm
  • Power input connector3 Pin
  • Product colorBlack
  • Product typeFan only
  • Compact 40 mm frame fits tight builds
  • 12 V 0.31 A draw keeps power use low
  • Three-pin connector enables speed monitoring
  • SANYO 4028 design ensures reliable airflow
  • Fan-only unit suits custom heatsink setups

40 mm SANYO 12 V fan

The OEM Industries 109P0412G3D073 is a 40 mm square cooling fan built by SANYO for 12 V operation. It draws 0.31 A through a standard three-pin connector and carries no LED lighting. The unit is sold as a fan only, without heatsink or mounting hardware. It suits technicians replacing a failed 4028-size fan in compact chassis or legacy CPU coolers.

Three-pin power connector

The three-wire interface supplies power, ground and a tachometer signal so the motherboard can monitor rotational speed. No PWM wire is present, so voltage control is the only speed-regulation method available. Because the package contains only the fan itself, installers must reuse existing screws, brackets or retention clips from the original cooler assembly.

Repairers needing a 4028 replacement

This fan fits builds that specifically require a 40 mm by 28 mm frame with 12 V 0.31 A ratings and a three-pin header. It does not suit systems that demand PWM control, larger frame dimensions, higher airflow specifications or integrated RGB illumination. Buyers needing a complete cooler kit with heatsink and mounting parts should look elsewhere.

How it compares

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

Price $23.99
Pricier than about 68% 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 name109P0412G3D073
Product colorBlack
Product typeFan only
Power
Power input connector3 Pin
Size & build
Fan size40 mm
More details
LED lightingNo

Questions about this item

Will the 109P0412G3D073 sleeve bearing need relubrication or replacement?

The 40 mm sleeve-bearing fan is not user-serviceable; when noise or speed drops, replace the whole 109P0412G3D073 unit.

What limits continuous operation of the 12 V 0.31 A motor?

The 12 V 0.31 A rating is the thermal ceiling; sustained load at that current will hit the motor’s temperature limit first.

How loud and warm does the 4028 fan get running all day?

The 4028 12 V 0.31 A fan runs at a modest current, producing a low hum and slight warmth that case airflow disperses.

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