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Small square plastic fan 40mm wide 28mm deep black finish four wire connector

Haywards

Haywards DBTB0428B2G 40x40x28mm 12V 1A 18000RPM 4-pin PWM video accessory

SKU CH-NC3E-S08QX

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 rating

  • TypeOther
  • 40×40×28 mm footprint fits tight chassis spaces
  • 12 V, 1 A draw keeps power load low
  • 18000 RPM delivers high airflow of 19.4 CFM
  • 4-pin PWM enables intelligent temperature-based speed control
  • Double ball bearing rated for 70000 hours of operation

Compact 40mm PWM fan for tight builds

The Haywards DBTB0428B2G is a 40 by 40 by 28 millimetre axial fan that runs on 12 volts and draws one ampere. Its four-pin PWM interface allows the host system to adjust speed automatically based on temperature. Double ball bearings support the high rotational speed and contribute to the rated 70000 hour lifespan. This fan suits small-form-factor cases or targeted component cooling where space is at a premium.

High airflow with audible trade-offs

At up to 18000 RPM the fan moves 19.4 CFM of air, providing strong cooling headroom for concentrated heat loads. The operating voltage range spans 7.0 to 13.4 volts, so speed can be reduced for quieter operation. Even at lower speeds the double ball bearing design maintains consistent performance. However the maximum speed produces 54 dB of noise, which will be noticeable in quiet environments.

Limited by 40mm frame and 12 watt power

The 40 millimetre frame restricts total airflow compared with larger fans, so it cannot replace an 80 millimetre unit in high-heat server chassis. The 12 watt power draw and 12 volt supply are compatible with standard motherboard fan headers. PWM control and speed reporting work through the four-wire connection. Builders needing silent operation or greater total air volume should consider larger frame sizes.

Highlights

  • 40×40×28 mm footprint fits tight chassis spaces
  • 12 V, 1 A draw keeps power load low
  • 18000 RPM delivers high airflow of 19.4 CFM
  • 4-pin PWM enables intelligent temperature-based speed control
  • Double ball bearing rated for 70000 hours of operation

Specifications

TypeOther

Questions about this item

Will the 40 mm 12 V PWM fan fit the same mounting holes as my existing 40 mm case fan?

Yes, the 40×40×28 mm frame matches the standard 40 mm mounting pattern, so it aligns with the screw holes used by other 40 mm fans you may already have installed.

How can I confirm the fan is running at the advertised 18000 RPM after installation?

The 4-wire PWM interface reports real-time speed to the motherboard; you can verify 18000 RPM ±10 % in BIOS or any hardware-monitoring utility that reads the tachometer signal.

Does the package include mounting screws or do I need to buy them separately?

The supplier lists Package: Yes but does not detail contents; assume the fan only and keep any spare M3 screws from your old 40 mm fan for installation.

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