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Small black square 40mm CPU fan with 3-pin connector

OEM Industries

OEM Industries DS04020B12S 40x20mm 12V .4A 3-pin CPU cooler

SKU CH-QRWY-6HGGQ

A 40 mm square fan with 12 V .4 A draw and 3-pin connector for compact CPU cooling

  • ColorBlack
  • TypeFan only
  • Fan Size40mm
  • Bearing Type1 Ball, 1 Sleeve
  • Power Connector3 Pin
  • LEDNo
  • Compact 40×20 mm footprint fits tight builds
  • 12 V, 0.4 A draw keeps power use low
  • 3-pin connector enables motherboard speed control
  • Hybrid ball-and-sleeve bearing balances noise and life
  • Plain black fan-only design suits any system colour scheme

40 mm 12 V DC fan for compact CPU cooling

The OEM Industries DS04020B12S is a square 40 mm by 20 mm axial fan that runs on 12 V at 0.4 A through a standard 3-pin connector. It uses a hybrid bearing with one ball and one sleeve element and has no LED lighting. The unit is supplied as a fan only, without a heatsink or mounting hardware, and is intended for tight spaces where a low-profile cooler is required.

Suitable for small-form-factor repairs

Builders working on 1U servers, thin clients or industrial boards with a 4020 mounting pattern can use this fan as a direct replacement. It is not suited for standard desktop sockets that expect a larger heatsink assembly, nor for systems that require PWM speed control via a 4-pin header. Buyers needing higher airflow or a complete cooler with fins should consider other solutions.

Steady airflow within a fixed 12 V supply

Because the fan operates at a constant 12 V and 0.4 A, its rotational speed and noise level remain stable during prolonged operation rather than ramping up and down. The mixed bearing design is intended to maintain consistent performance over long running periods in enclosed chassis. Thermal behaviour will depend on the heatsink it is paired with and the case ventilation available.

Pontos fortes

  • Compact 40×20 mm footprint fits tight builds
  • 12 V, 0.4 A draw keeps power use low
  • 3-pin connector enables motherboard speed control
  • Hybrid ball-and-sleeve bearing balances noise and life
  • Plain black fan-only design suits any system colour scheme

Especificações

ModelDS04020B12S
ColorBlack
TypeFan only
Fan Size40mm
Bearing Type1 Ball, 1 Sleeve
Power Connector3 Pin
LEDNo

Perguntas sobre este artigo

What motherboard header do I need to connect the 3-pin connector on this 40 mm fan?

The fan uses a standard 3-pin power connector that plugs into any 3-pin or 4-pin motherboard fan header.

Will the 12 V 0.4 A rating of this cooler exceed what an older 3-pin header can supply?

The cooler draws 0.4 A at 12 V, which is within the typical current limit of most legacy 3-pin motherboard headers.

How can I confirm the fan is spinning correctly after I install the DS04020B12S?

Check the fan RPM reading in the BIOS hardware monitor or a system utility to verify it reports a stable speed.

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