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Small black 40mm square fan with three wires

OEM Industries

OEM Industries D04G-12TS9 40mm Ball Bearing Fan 12V 3-Wire

SKU CH-CTFW-DT47J

A 40 mm ball-bearing DC fan running at 12 V with a three-wire connector for speed monitoring

  • Fan size40 mm
  • Bearing designBall
  • Power input connector3 Wires
  • Product colorBlack
  • Product typeFan only
  • Genuine Nidec build quality ensures reliable long-term operation
  • Ball bearing design reduces friction for extended service life
  • Compact 40×40×20 mm frame fits tight chassis spaces
  • 12 V 0.22 A rating delivers efficient cooling with low power draw
  • Three-wire connector enables speed monitoring for precise thermal control

Original Nidec 4020 DC Cooling Fan

The Original Nidec D04G-12TS9 is a 40mm square cooling fan designed for 12V DC operation in compact electronic assemblies. It draws 0.22A and uses a three-wire power connector for speed monitoring. The unit measures 40 by 40 by 20mm and features a black plastic frame with ball bearing construction.

For tight-chassis builds needing 12V axial airflow

This fan suits technicians replacing a failed 4020 unit in industrial equipment, small-form-factor PCs or networking gear where a 12V three-wire interface is required. Buyers who need a different voltage, a two-wire or four-wire connector, or a larger frame size should look at other models.

Ball bearing motor for continuous duty

The ball bearing design supports continuous rotation with reduced friction compared to sleeve alternatives, making it appropriate for 24/7 environments where bearing wear is a primary concern.

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 nameD04G-12TS9
Product colorBlack
Product typeFan only
Power
Power input connector3 Wires
Size & build
Fan size40 mm
Bearing designBall
More details
LED lightingNo

Questions about this item

What power header does the D04G-12TS9 need on the motherboard or controller?

The fan uses a three-wire connector that plugs into a standard 12 V fan header supplying 0.22 A.

Will the 40 mm frame and 20 mm depth fit inside the same mounting holes as my existing 4020 cooler?

Yes, the 40×40×20 mm dimensions match the 4020 form factor, so existing screw holes line up.

How can I confirm the ball-bearing fan is spinning correctly after installation?

Check the BIOS or monitoring software for a stable RPM reading from the third wire and listen for smooth, vibration-free operation.

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