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Small square black frame cooling fan with center hub and blades

Fans

Fans 109P0412B303 4028 40mm 12V .28A ball bearing case fan

SKU CH-KR8B-V351C

40 mm case fan with ball-bearing motor runs at 12 V drawing 0.28 A

  • Ball-bearing motor reduces wear for longer service life
  • 12 V 0.28 A draw keeps power demand low
  • 40 × 40 × 28 mm frame fits tight chassis spaces
  • 109P0412B303 4028 model code simplifies ordering

12 V 40 mm ball-bearing case fan

This 40 mm square fan runs on 12 V and draws 0.28 A. The ball-bearing design targets continuous operation in tight chassis positions. It suits builders who need a compact airflow source for small-form-factor enclosures or localized component cooling. The 4028 frame depth fits standard 40 mm mounting holes without modification.

Capacity and headroom for targeted airflow

The fan delivers focused air movement across VRM heatsinks, chipset coolers or tight drive bays where larger fans cannot mount. It is not suited for high-static-pressure radiator stacks or full-case exhaust duties that demand greater volumetric flow. Buyers needing higher CFM or PWM speed control should consider larger frame sizes.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 70% of the 8,339 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the 40 mm frame and 12 V connector fit the mounting holes on my older 40 mm case fan slot?

The fan uses a standard 40 mm square frame with 12 V power, so it aligns with existing 40 mm mounting holes and headers.

How can I confirm the 109P0412B303 is spinning correctly after installation?

Check that the ball bearing fan rotates smoothly at 12 V and draws about 0.28 A; listen for quiet, steady airflow from the 4028 unit.

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