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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

  • TypeCase Fan
  • Fan Size40mm
  • Bearing Type2 Ball
  • RPM>7000 RPM
  • Air Flow>80 CFM
  • Noise Level45 - 50 dBA
  • 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.

Highlights

  • 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

Specifications

TypeCase Fan
Fan Size40mm
Bearing Type2 Ball
RPM>7000 RPM
Air Flow>80 CFM
Noise Level45 - 50 dBA
Power Connector3 Pin
ColorBlack
LEDNon-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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