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Small black 40mm square server fan with four wires and double ball bearing

SXDOOL

SXDOOL SUNON VF40281BX-D180-S9H 40mm 12V 18000RPM 24CFM 2 Ball case fan

SKU CH-B73R-637M8

A 40 mm dual-ball-bearing fan delivers 24 CFM at 18000 RPM with PWM speed control and a 52.1 dB noise rating

  • Fan size40 mm
  • Bearing design2 Ball
  • Rotational speed18,000 RPM
  • Airflow rate24CFM
  • Operating noise52.1db
  • Power input connector4-wire
  • High airflow at 24 CFM from a 40 mm frame
  • 18000 RPM speed for intensive cooling loads
  • Double ball bearing extends operating life
  • 4-wire PWM enables automatic speed control
  • Wide 4.5 V to 13.8 V input range

40mm 12V server fan

The SUNON VF40281BX-D180-S9H is a 40mm dual-ball-bearing fan designed for 12V DC systems. It delivers 24CFM airflow at 18000RPM for dense server or workstation chassis. The 4-wire connector enables PWM automatic speed control.

PWM control and compact frame

The 40 x 40 x 28mm frame fits tight 40mm mounting holes in 1U or blade enclosures. PWM support lets the motherboard or controller vary speed between 4.5V and 13.8V. Rated current of 1.00A simplifies power budgeting for multi-fan arrays.

52.1dB at full speed

At 18000RPM the fan produces 52.1dB noise while moving 24CFM. Dual ball bearings sustain high-speed operation with reduced wear. Lower PWM duty cycles cut both airflow and acoustic output for quieter idle periods.

How it compares

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

Price $14.99
Cheaper than about 67% 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 colorBlack
Performance
Rotational speed18,000 RPM
Airflow rate24CFM
Power
Power input connector4-wire
Size & build
Fan size40 mm
Bearing design2 Ball
Environment & compliance
Operating noise52.1db
More details
LED lightingNo

Questions about this item

How long will the double ball bearing last at 18000 RPM under continuous load?

Double ball bearings are rated for extended operation at 18000 RPM and resist wear better than sleeve types under sustained high-speed use.

What noise and heat output should I expect when the fan runs at full speed all day?

At 18000 RPM the fan produces 52.1 dB noise and draws 1.00 A at 12 V, so sustained operation stays within the 4.5 V to 13.8 V working range.

Does my motherboard need a 4-pin PWM header to control this fan?

Yes, the 4-wire connector requires a standard 4-pin PWM header for automatic speed control; a 3-pin header will only run it at fixed voltage.

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