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Black square 40 by 20 mm cooling fan with three wires

OEM Industries

OEM Industries GM1204PKBX-8A 4020 CPU cooler

SKU CH-347Q-N6ARF

A 40 mm square cooling fan with Mgalev bearing, 12 V 2.4 W power and three-wire connection

  • ColorBlack
  • TypeFan only
  • Bearing TypeMgalev
  • LEDNo
  • Compact 40 × 20 mm footprint fits tight spaces
  • Maglev bearing reduces friction for longer life
  • 12 V 2.4 W draw keeps power use low
  • Three-wire connector enables speed monitoring
  • Fan-only design lets you choose your own heatsink

Compact 40×20 mm Cooling Fan

This OEM Industries square fan measures 40 by 20 millimetres and operates at 12 volts with a 2.4 watt draw. The three-wire connector provides tachometer feedback for speed monitoring. It is intended for builders who need a low-profile cooler in tight chassis spaces.

Mgalev Bearing Limits

The Mgalev bearing reduces friction and extends service life compared with traditional sleeve designs. It still relies on a single fan stage, so airflow scales linearly with voltage and cannot match dual-fan or larger-frame coolers. Acoustic output rises noticeably when the unit runs at full voltage.

2.4 W Thermal Headroom

At 2.4 watts the fan suits low-power CPUs, embedded boards or auxiliary component cooling. It cannot dissipate the heat loads of modern mainstream desktop processors under sustained load. Systems requiring higher thermal capacity will need a larger heatsink or additional airflow.

Points forts

  • Compact 40 × 20 mm footprint fits tight spaces
  • Maglev bearing reduces friction for longer life
  • 12 V 2.4 W draw keeps power use low
  • Three-wire connector enables speed monitoring
  • Fan-only design lets you choose your own heatsink

Caractéristiques

ModelGM1204PKBX-8A
ColorBlack
TypeFan only
Bearing TypeMgalev
LEDNo

Questions sur cet article

Which size version of the GM1204PKBX-8A fits a 40 mm by 20 mm mounting pattern?

The 4020 square frame measures 40 mm by 20 mm, so this model matches that exact footprint.

What does the 2.4 W rating tell me about heat dissipation once the fan is installed?

At 12 V the fan draws 2.4 W, indicating the motor power available to move air through the heatsink.

How does the 3-wire connection limit speed control compared with a 4-wire PWM header?

The three wires provide power, ground and a tachometer signal; voltage regulation is the only way to vary speed.

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