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Square black 40 mm frame 20 mm deep axial fan

Fans

Fans KD1204KB2 40x40x20mm 12V .9W case fan

SKU CH-WX3J-Z24PM

Compact 40 mm square case fan runs on 12 V and draws 0.9 W for quiet cooling

  • Compact 40×40×20 mm footprint fits tight spaces
  • 12 V, 0.9 W draw keeps power use low
  • SUNON build rated for quiet, durable operation
  • 4020 form factor matches standard mounting points

Compact 40 mm case fan

The SUNON KD1204KB2 is a 40 mm square case fan designed for tight spaces in small-form-factor PCs or rack equipment. It runs on 12 V power and draws only 0.9 W, making it a low-energy option for targeted airflow. Buyers who need higher static pressure or larger frame sizes should look elsewhere.

40 x 40 x 20 mm footprint

Physical dimensions are 40 mm by 40 mm by 20 mm thick, so the fan fits standard 4020 mounting holes without modification. Verify that your chassis or heatsink provides exactly this clearance before ordering.

How it compares

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

Price $11.99
Cheaper than about 85% 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

What does the 0.9 W power draw mean once the fan is running in a case?

At 0.9 W the fan draws very little current from a 12 V header, so it adds almost no load to the power budget while still moving air through a 40 mm frame.

What does the 12 V connection cap in practice?

The 12 V supply limits the fan to its rated 0.9 W and fixed speed, so airflow and noise stay constant without PWM control.

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