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Small square 40 mm 12 V four-pin cooling fan with plastic frame and double ball bearing

Haywards

Haywards DBTB0428B2G 40 mm 12 V 4-pin video accessory

SKU CH-DT8E-E95MF

A 40 mm 12 V 4-pin cooling fan with double ball bearings, PWM speed control, and 18 000 RPM maximum speed

  • TypeOther
  • 40 mm frame fits tight server chassis
  • 12 V four-pin PWM enables intelligent speed control
  • Double ball bearing rated for 70000 hours
  • 18000 RPM delivers 19.4 CFM airflow
  • 54 dB noise level suits performance-focused builds

What this 40 mm 12 V fan does

The Haywards DBTB0428B2G is a 40 mm by 40 mm by 28 mm cooling fan that runs on 12 V DC and draws up to 1 A for 12 W. It connects through a 4-pin PWM interface so the motherboard can regulate speed automatically. The unit uses a double ball bearing and is built for computer-case airflow in server or workstation builds.

Sustained-load behaviour

At full PWM duty the motor spins up to 18 000 RPM ±10 % and moves 19.4 CFM of air. The operating voltage window is 7.0 V to 13.4 V, so speed stays stable even if the rail sags under load. Double ball bearings are rated for 70 000 hours of continuous running, giving a predictable lifespan in 24/7 environments.

Thermals, noise and power draw

Maximum noise reaches 54 dB when the fan hits top speed, a direct result of the high airflow design. Power draw peaks at 12 W at 12 V, and the 4-pin connector reports real-time RPM to the system for closed-loop control. Buyers who need silent operation or lower airflow should choose a different model.

Highlights

  • 40 mm frame fits tight server chassis
  • 12 V four-pin PWM enables intelligent speed control
  • Double ball bearing rated for 70000 hours
  • 18000 RPM delivers 19.4 CFM airflow
  • 54 dB noise level suits performance-focused builds

Specifications

TypeOther

Questions about this item

How loud is the 54 dB radiator noise when this fan runs continuously?

The fan produces 54 dB of radiator noise at full speed, which is noticeable in a quiet room but typical for a 40 mm high-speed cooler running all day.

Does my system need a 4-pin PWM header to use the 4-wire interface on this cooler?

Yes, the 4-wire interface requires a standard 4-pin PWM header on the motherboard or fan controller for power and speed control.

Will the 7.0-13.4 V operating range work with older 12 V server backplanes?

The fan operates from 7.0 V to 13.4 V, so it is compatible with standard 12 V server backplanes and older 12 V power rails.

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