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

Haywards

Haywards 40mm 12V 4-pin cooling fan DBTB0428B2G video accessory

SKU CH-PWNH-BS4G1

A 40 × 40 × 28 mm 12 V four-pin fan with double ball bearings, PWM speed control and a rated 70 000-hour life

  • Delivers 19.4 CFM airflow for rapid heat removal
  • Spins up to 18000 RPM for high-speed cooling
  • Double ball bearing rated for 70000 hours life
  • PWM intelligent temperature control adjusts fan speed automatically
  • Operates from 7.0 to 13.4 V for flexible power compatibility

40 mm 12 V PWM case fan

This 40×40×28 mm fan runs on 12 V and draws up to 1 A through a 4-pin PWM connector. Double ball bearings support speeds up to 18 000 RPM ±10 % and an airflow of 19.4 CFM. The unit is rated for 70 000 hours of operation at a noise level of 54 dB.

Check voltage range and connector

Your system must supply between 7.0 V and 13.4 V on a standard 4-wire PWM header. The fan’s 12 W peak draw and high rotational speed require a header that can deliver sufficient current. Verify that your motherboard or fan controller supports PWM control and the stated operating voltage window.

No extra accessories included

The package contains only the fan itself; no mounting screws, adapters or software are supplied. Buyers needing vibration dampeners, alternative connectors or speed-profile utilities must source them separately. The built-in PWM temperature control and speed-measurement function operate without additional drivers.

How it compares

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

Price $21.99
Cheaper than about 69% of the 3,838 comparable items (median $41.99).

Specifications

Product
Product typeOther

Questions about this item

What comes in the box and what must I buy separately?

The fan ships with its 40×40×28 mm frame, 4-pin power connector and double ball bearing already fitted. No mounting screws, fan filters or PWM cables are included, so supply those yourself if your case or heatsink needs them.

Which version should I choose — the 0.16 A NMB 7525 reference or the 1 A DBTB0428B2G model?

The DBTB0428B2G is the only model offered here; it draws 1 A at 12 V (12 W) and spins up to 18000 RPM, while the NMB 7525 label refers to a different 0.16 A unit. Pick this model when you need the higher airflow of 19.4 CFM.

What does 18000 RPM mean once the fan is installed in my case?

At full PWM duty the fan reaches 18000 RPM ±10 %, moving 19.4 CFM through a 40 mm frame. Expect 54 dB radiator noise at that speed; the 7.0–13.4 V operating range lets the motherboard lower RPM and noise when thermal load drops.

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