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Small black square 40 mm fan with four wires and plastic frame

Haywards

Haywards DBTB0428B2G 40×40×28 mm 12 V 18000 RPM video accessory

SKU CH-9175-9Z0WQ

A 40 × 40 × 28 mm 12 V fan spins up to 18000 RPM with PWM control and double ball bearings

  • High-speed cooling at up to 18000 RPM
  • 12 V operation with 7.0-13.4 V range
  • Double ball bearing rated for 70000 hours
  • PWM intelligent temperature control with speed measurement
  • 4 CFM airflow in 40×40×28 mm frame

40 mm 12 V server fan

The Haywards DBTB0428B2G is a 40×40×28 mm axial fan built for high-density server and workstation chassis. It runs on 12 V DC with a 4-wire PWM interface and double ball bearings rated for 70000 hours. The unit delivers up to 18000 RPM and 19.4 CFM airflow at a declared 54 dB noise level.

Replaces standard 40 mm case fans

This model targets slots where a conventional 40 mm fan cannot move enough air for dense component layouts. The jump is justified when thermal headroom is exhausted by stock coolers and the system can tolerate 54 dB operational noise. It operates across 7.0–13.4 V, allowing speed scaling via motherboard PWM control.

Suits dense server builds

Builders needing maximum airflow from a 40 mm frame will benefit from the 18000 RPM peak and PWM speed measurement. Buyers who require quiet acoustics or who cannot accommodate 54 dB noise should consider lower-speed alternatives. The fan includes a 4-pin connector and plastic frame for standard mounting.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $29.99
Cheaper than about 60% of the 3,838 comparable items (median $41.99).

Specifications

Product
Product typeOther

Questions about this item

Will the 40×40×28 mm frame with a 4-wire 4pin power interface fit my 40 mm fan mount?

Yes, the fan measures 40×40×28 mm and uses a standard 4pin connector, so it matches common 40 mm mounting holes and motherboard headers.

How do I connect the 4pin PWM plug, and what is the common mistake?

Plug the 4pin connector into a 12 V PWM header; the error is using a 3pin voltage-controlled header, which disables the intelligent temperature control and speed measurement functions.

When should I plan to replace the double ball bearing fan rated for 70000 hours?

The bearing life is 70000 hours; at continuous use that equals several years, so schedule a replacement when the fan reaches that runtime or if noise rises above the specified 54 dB.

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