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Small square 12V cooling fan, black plastic frame, four wires, 40 by 40 by 28 mm

Haywards

Haywards 40×40×28mm 12V 4-Wire Cooling Fan

SKU CH-HH7K-8ASYA

Compact 40×40×28 mm axial fan with 4-wire PWM control, double ball bearings and 19.4 CFM airflow at up to 18000 RPM

  • TypeOther
  • 40 mm frame fits tight chassis spaces
  • 12 V operation draws 1 A for 12 W power
  • 4-wire PWM enables intelligent temperature control
  • Double ball bearing rated for 70000 hours life
  • 18000 RPM delivers 19.4 CFM airflow at 54 dB

40×40×28mm 12V 4-Wire Cooling Fan

This 40mm axial fan fits computer cases and similar chassis where a compact 12V cooler is required. The four-wire PWM interface allows intelligent temperature control and speed reporting. It is suited to builders who need high airflow in a small footprint. Buyers who want a larger frame size or a quieter low-speed unit should look elsewhere.

Double ball bearing and 4-pin connector

The fan uses a double ball bearing and a standard 4-pin power connector for straightforward installation in compatible headers. High rotational speed up to 18000 RPM produces noticeable noise around 54 dB, so mounting in a well-damped case or isolating the frame helps reduce perceived sound. Ensure the header can supply the rated 1A current.

PWM control range 7.0-13.4V

Speed scales with PWM duty cycle across an operating voltage window of 7.0 to 13.4V, delivering up to 19.4 CFM at peak RPM. The 12W power draw and 70000-hour bearing life set practical limits for continuous duty. The 4-wire standard does not define a maximum cable length, so keep leads short to avoid voltage drop.

Highlights

  • 40 mm frame fits tight chassis spaces
  • 12 V operation draws 1 A for 12 W power
  • 4-wire PWM enables intelligent temperature control
  • Double ball bearing rated for 70000 hours life
  • 18000 RPM delivers 19.4 CFM airflow at 54 dB

Specifications

TypeOther

Questions about this item

How do I confirm the fan is running at its rated 18000 RPM after installation?

Use the 4-wire PWM interface to read the tachometer signal; the speed should sit within ±10 % of 18000 RPM and the noise level near 54 dB.

What comes in the box and what must I source separately?

The fan unit is included; you must provide a 12 V power source capable of 1 A and a motherboard or controller with a 4-pin PWM header.

Which capacity or version should I choose for a 40 mm case slot?

Select the DBTB0428B2G model — 40×40×28 mm, 12 V, 12 W, double ball bearing, 19.4 CFM airflow and 70000-hour rated life.

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