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Small black 40mm square case fan, 28mm thick, three-wire connector, no LED

SXDOOL

SXDOOL DB04028B12M-189 40mm 12V 0.45A 3-pin case fan

SKU CH-HPPA-WW86T MPN DB04028B12M-189

40 mm dual-ball-bearing fan spins above 7000 RPM to push over 80 CFM at 45–50 dBA on a 3-pin 12 V connector

  • Fan size40 mm
  • Bearing design2 Ball
  • Rotational speed>7,000 RPM
  • Airflow rate>80 CFM
  • Operating noise45–50 dBA
  • Power input connector3 Pin
  • 40 mm compact footprint fits tight chassis spaces
  • 7000 RPM and 80 CFM deliver strong airflow for dense builds
  • Dual ball bearing design reduces wear and extends service life
  • 12 V operation with 0.45 A draw keeps power use low
  • 45–50 dBA rating balances cooling performance with audible noise

40mm 12V Double Ball Bearing Fan

The SXDOOL DB04028B12M-189 is a 40mm case fan built around a double ball bearing for long service life in continuous operation. It runs on 12V DC with a 0.45A current draw and connects through a standard three-pin power lead. The black, non-LED frame measures 40 by 40 by 28mm and weighs 25g.

Suitable For Tight Server Chassis

This fan suits builders who need high airflow from a 40mm mount in 1U servers, blade enclosures or compact workstations where space is at a premium. It is not for silent-focused builds that require noise levels below 45 dBA, nor for systems that lack a three-pin header or cannot supply 12V at the rated current.

Speed and Airflow Rating

The unit spins faster than 7000 RPM with a peak speed of 9500 RPM and delivers more than 80 CFM of airflow across an operating voltage range of 6.0 to 13.8V. This combination of speed and airflow is the key figure that determines whether the fan can meet the thermal demands of a dense chassis.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 90% of the 8,339 comparable items (median $19.99).
Fan size 40 mm
Lower than about 90% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Product typeCase Fan
Product colorBlack
Performance
Rotational speed>7,000 RPM
Airflow rate>80 CFM
Power
Power input connector3 Pin
Size & build
Fan size40 mm
Bearing design2 Ball
Environment & compliance
Operating noise45–50 dBA
More details
LED lightingNon-LED

Questions about this item

How do I mount this 40mm fan in a 40x40mm cut-out?

Align the four corner holes with your chassis cut-out, insert 3mm screws through the 28mm-thick frame and tighten evenly; the 3-pin plug connects to a standard motherboard header.

What maintenance will the double ball bearing need?

The high-precision double ball bearing is rated maintenance-free for the life of the fan; no lubrication or cleaning schedule is required.

At what point does the 45-50 dBA noise ceiling limit sustained operation?

The fan runs at over 7000 RPM producing 45-50 dBA continuously; the acoustic level itself is the first constraint in quiet builds.

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