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Small square black plastic 40mm cooling fan with four wires

Haywards

Haywards DBTB0428B2G 40mm 12V 4-pin fan video accessory

SKU CH-G9DA-QYY9H

A 40 mm 12 V PWM fan with double ball bearings, 18 000 RPM top speed and 19.4 CFM airflow for compact case cooling

  • 40 mm compact frame fits tight computer cases
  • 12 V operation with 7.0–13.4 V range powers from standard headers
  • 18 000 RPM peak speed delivers 19.4 CFM airflow
  • Double ball bearing rated for 70 000 hours running life
  • 4-pin PWM interface enables intelligent temperature control

40 mm 12 V 4-pin cooling fan

This 40 mm fan runs on 12 V DC and uses a four-pin PWM interface for intelligent temperature control and speed monitoring. It is built with a double ball bearing and a plastic frame measuring 40×40×28 mm. The unit is supplied as a new accessory for computer-case cooling.

Suited for compact case upgrades

The fan delivers up to 18000 RPM and 19.4 CFM, making it useful for tight spaces that need strong directed airflow. Buyers who require quiet operation should look elsewhere because the manufacturer notes noticeable noise at high speed. It is not intended for large-area case ventilation or radiators needing greater static pressure.

Check 12 V four-pin header availability

Verify that your motherboard or fan controller provides a 12 V four-pin PWM header and that the operating voltage range of 7.0-13.4 V matches your supply. Confirm 40 mm mounting holes and 28 mm depth fit your chassis or heatsink. The 54 dB noise rating at full speed may exceed comfort limits in noise-sensitive builds.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 67% of the 3,838 comparable items (median $41.99).

Specifications

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Product typeOther

Questions about this item

What power supply connector do I need to run the DBTB0428B2G fan?

The fan uses a 4-pin power interface that plugs directly into a standard 12 V PWM header on the motherboard or fan controller.

Will the 40 mm frame fit the mounting holes of my existing 120 mm case fan slots?

No, the fan measures 40×40×28 mm so it only fits 40 mm mounting patterns; it cannot be screwed into 120 mm holes.

How can I verify the fan is spinning at its rated 18000 RPM after installation?

Enable PWM speed reporting in BIOS or monitoring software; the 4-wire interface provides a tachometer signal that should read 18000 RPM ±10 % under full load.

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