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Small black plastic 40×40×28mm 4-pin PWM cooling fan

Haywards

Haywards DBTB0428B2G 40×40×28mm 4-wire PWM fan 12V 1A

SKU CH-82NB-R8ES5

A 40×40×28 mm 12 V PWM fan with double ball bearing, 18 000 RPM top speed, 19.4 CFM airflow and 54 dB noise

  • TypeOther
  • PWM speed control adjusts cooling to demand
  • 18000 RPM delivers strong airflow for tight spaces
  • Double ball bearing rated for 70000 hours
  • 40×40×28 mm fits compact GPU coolers
  • 4-wire interface enables monitoring and regulation

Compact 40 mm PWM fan for GPU coolers

The Haywards DBTB0428B2G is a 40×40×28 mm 12 V fan with a four-wire PWM interface and double ball bearing. It spins up to 18000 RPM ±10 % and delivers 19.4 CFM of airflow at a rated noise level of 54 dB. The unit draws 1 A at 12 V for 12 W power and operates between 7.0 V and 13.4 V. Rated life is 70000 hours.

Suited for tight graphics-card heatsinks needing

This fan fits small turbo-style GPU coolers that accept a 40 mm frame and a 4-pin PWM header. Builders who need a quieter solution or a larger frame should look elsewhere, as the high rotational speed produces noticeable noise and the 40 mm footprint limits compatibility with standard case mounts.

Verify mounting holes, header type and voltage range

Confirm the cooler uses a 40 mm square mounting pattern and a four-pin PWM header that can supply 12 V at 1 A. Check that the controller supports the 7.0–13.4 V operating window and that the 54 dB noise level is acceptable for the intended environment.

Highlights

  • PWM speed control adjusts cooling to demand
  • 18000 RPM delivers strong airflow for tight spaces
  • Double ball bearing rated for 70000 hours
  • 40×40×28 mm fits compact GPU coolers
  • 4-wire interface enables monitoring and regulation

Specifications

TypeOther

Questions about this item

What power connector must my graphics card or motherboard provide for the DBTB0428B2G to run?

The fan uses a 4-pin PWM connector that plugs directly into a standard 4-pin fan header on a graphics card or motherboard.

Will the 40×40×28 mm frame and 4-pin PWM interface fit the mounting holes and header of my older Delta KUB04512HA cooler?

Yes, this model is listed as a direct replacement for the Delta KUB04512HA 4510, matching the same 40 mm square footprint, 28 mm thickness and 4-wire PWM control.

How can I confirm the fan is operating correctly once installed?

With PWM control active the speed should reach up to 18000 RPM ±10 %, airflow should measure around 19.4 CFM and noise should be near 54 dB; the tachometer wire reports real-time speed to the system.

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