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Small square 40mm black case fan with three-pin connector

SXDOOL

SXDOOL FD124020EB 40x40x20mm 12V 3-pin case fan

SKU CH-F0K1-9TSXZ

Compact 40×40×20 mm 12 V case fan with double ball bearings, 9000 RPM and 33.5 dB noise

  • High airflow from 9000 RPM speed reference
  • Quiet operation at 33.5 dB noise level
  • Long lifespan with 50000 hour service life rating
  • Reliable cooling via double ball bearing design
  • Speed monitoring supported by 3-pin motherboard interface

Compact 40 mm Case Fan

This 40 x 40 x 20 mm case fan runs on 12 V through a standard three-pin motherboard header. It spins at a reference speed of 9 000 rpm with a tolerance of ±10 %. A double ball bearing design is rated for 50 000 hours of service life. Noise is specified at 33.5 dB.

Suitable Builds and Limitations

The unit fits tight spaces such as small-form-factor chassis, GPU coolers or industrial enclosures that accept a 40 mm frame. Builders who need higher airflow, larger frame sizes or PWM speed control should look at alternative models. The 0.12 A current draw keeps power demand low for auxiliary cooling roles.

Deciding Specification

The 33.5 dB noise rating at 9 000 rpm determines whether this fan meets the acoustic target of the build. If a quieter profile is required, a different fan must be chosen.

Highlights

  • High airflow from 9000 RPM speed reference
  • Quiet operation at 33.5 dB noise level
  • Long lifespan with 50000 hour service life rating
  • Reliable cooling via double ball bearing design
  • Speed monitoring supported by 3-pin motherboard interface

Specifications

No published specifications for this item yet.

Questions about this item

How loud is the 33.5 dB noise rating when the fan runs continuously at 9000 RPM?

At 33.5 dB the fan produces a moderate hum comparable to a quiet office; the double ball bearing keeps the sound steady even after long sessions.

My motherboard only has a 3-pin header — will the 3-pin connector plug in directly?

Yes, the motherboard-style 3-pin interface fits standard 3-pin headers and provides speed monitoring without an adapter.

Can the 40×40×20 mm frame mount in the same screw holes as my old 40 mm fan?

The 40 mm square frame uses the industry-standard mounting pattern, so it aligns with existing 40 mm screw holes.

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