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Small square 40mm black plastic cooling fan with four wires and central rotor

Haywards

Haywards 40mm 12V DC Fan 18000 RPM 54 dB

SKU CH-2W4T-HY4DV

A 40 mm 12 V DC fan spinning up to 18000 RPM with 54 dB noise and 19.4 CFM airflow, featuring PWM control and double ball bearings

  • 12 V fan with PWM temperature control for automatic speed adjustment
  • 18 000 RPM peak speed delivers 19.4 CFM airflow for strong cooling
  • Double ball bearing rated for 70 000 hours of continuous operation
  • 40 × 40 × 28 mm frame fits standard 40 mm mounting points
  • 4-pin interface supports speed monitoring and precise voltage regulation

40 mm 12 V DC fan for compact cooling

This 40 mm fan runs on 12 V and spins up to 18000 RPM with a two-ball-bearing design. It suits tight enclosures such as small-form-factor cases or 3D-printer hot-end ducts where space is at a premium. The four-wire PWM interface allows automatic speed control based on temperature. Buyers needing larger airflow for full-size builds should look elsewhere.

19.4 CFM airflow and 54 dB noise ceiling

At 12 W the fan delivers 19.4 CFM, enough for targeted component cooling or extruder heat dissipation. The operating range of 7.0–13.4 V provides headroom for undervolting, but the 54 dB rating at full speed makes it unsuitable for silent workstations or bedroom PCs. Noise-sensitive users will find the acoustic output too high.

PWM speed measurement and four-wire control

The bundled four-pin connector adds PWM intelligent temperature control and real-time speed reporting to the host system. This lets the motherboard or controller adjust fan curves without manual intervention. No extra mounting hardware or software utilities are included, so installers must supply their own screws and configuration tools.

How it compares

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

Price $14.99
Cheaper than about 79% of the 3,838 comparable items (median $41.99).

Specifications

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Product typeOther

Questions about this item

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

Yes, the 40×40×28 mm frame matches the standard 40 mm square pattern used on most older case fans.

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

The 4-wire PWM interface reports real-time speed to the motherboard; check the RPM reading in BIOS or fan-control software.

Does the package include mounting screws or a 4-pin to 3-pin adapter?

The supplier only confirms the fan itself is included; screws and any adapter must be purchased separately.

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