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Small black 40 mm square cooling fan with four-pin connector and plastic frame

Haywards

Haywards DBTB0428B2G 40mm 12V 4-pin video accessory

SKU CH-CZSP-4TE5A

A 40 mm 12 V PWM cooling fan with double ball bearings, 18 000 RPM top speed, 19.4 CFM airflow and 54 dB noise

  • TypeOther
  • 40 mm frame fits tight case spaces
  • 12 V 4-pin PWM control adjusts speed automatically
  • Double ball bearing rated for 70000 hours
  • 18000 RPM delivers 19.4 CFM airflow
  • 54 dB noise level at full speed

40 mm 12 V PWM cooling fan

The Haywards DBTB0428B2G is a 40 mm square frame fan with a 28 mm thickness designed for computer case ventilation. It targets builders who need a compact 12 V unit with a four-wire PWM interface for automatic speed regulation. The double ball bearing construction supports continuous operation in tight chassis spaces.

54 dB noise at up to 18000 RPM

At maximum speed the fan reaches 18000 RPM ±10 % and produces a stated radiator noise level of 54 dB. Power draw is rated at 12 W from a 12 V supply with an operating range of 7.0–13.4 V. PWM intelligent temperature control adjusts RPM to match thermal load while the speed measurement line reports real-time rotation data.

Four-wire PWM interface fits standard headers

The 4-pin connector plugs directly into motherboard or controller PWM headers, eliminating the need for separate fan controllers. Double ball bearings and a 70000 hour life rating reduce maintenance in always-on systems. Buyers who require a 3-wire voltage-controlled fan or a larger frame size should select a different model.

Highlights

  • 40 mm frame fits tight case spaces
  • 12 V 4-pin PWM control adjusts speed automatically
  • Double ball bearing rated for 70000 hours
  • 18000 RPM delivers 19.4 CFM airflow
  • 54 dB noise level at full speed

Specifications

TypeOther

Questions about this item

How do I install the 40 mm 4-pin fan in a computer case and what step is often missed?

Mount the 40×40×28 mm frame with four screws, connect the 4-wire PWM plug to the motherboard header, and enable PWM control in BIOS so the 12 V 1 A fan can vary speed automatically.

What maintenance or replacement will the DBTB0428B2G need later?

The double ball bearing is rated for 70000 hours; after that the bearing may wear, so plan to replace the fan once it reaches that runtime.

What limit appears first during sustained high-speed operation?

At 18000 RPM the fan produces 54 dB noise, so acoustic level is the first constraint you will hit before thermal or voltage limits.

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