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Small black square 40mm cooling fan with three wires

Fans

Fans PMD1204PKB3 12V 2.6W 4020 40mm double ball temperature control case fan

SKU CH-8H40-2S5TN

A 40 mm double-ball-bearing axial fan with 12 V power and temperature-controlled speed for compact case cooling

  • Efficient cooling with 12 V 2.6 W power draw
  • Compact 40 × 40 × 20 mm fits tight builds
  • Double ball bearing extends service life
  • Three-wire 3-pin connector enables speed monitoring
  • Axial design delivers high airflow in slim profile

Sunon 40mm Double Ball Fan

The Sunon PMD1204PKB3 is a 12V axial case fan measuring 40 x 40 x 20mm. It draws 2.6W and uses a double ball bearing for durability. A three-wire 3P connector enables motherboard speed monitoring and alarm signals. It suits compact chassis or device cooling where installation depth is limited.

For tight spaces needing monitored airflow

Builders fitting small-form-factor cases or replacing OEM cooling in networking gear will value the 4020 footprint and tachometer feedback. Buyers who need higher static pressure for dense radiators or larger air volume for big towers should consider other form factors.

12V 2.6W 4020 double ball bearing

The 12V 2.6W rating and double ball bearing define the thermal envelope and mechanical life. Verify your header supplies 12V and that the 40 x 40 x 20mm dimensions fit the mounting holes before purchase.

How it compares

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

Price $25.99
Pricier than about 65% 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

Does my motherboard need a 3-pin header to run this 12 V fan?

Yes, the fan uses a red-black-white three-wire connector that plugs into a standard motherboard 3P header for power and speed-alarm signal.

Will the 40 mm frame fit the same mounting holes as my current 4020 fan?

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

How can I confirm the temperature control is active after installation?

Watch the fan speed rise and fall with component temperature; the third wire sends a tachometer signal the BIOS or monitoring software can display.

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