We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small square 40mm case fan with black frame and transparent blades, four-pin connector visible

SXDOOL

SXDOOL VF40281BX-D180-S9H 40mm 12V 24CFM 18000 RPM 4-Pin Case Fan

SKU CH-3M38-D60D6

A 40 mm case fan delivering 24 CFM at 18000 RPM with 4-pin PWM control and double ball bearing

  • TypeCase Fan
  • Power Connector4 Pin
  • High airflow of 24 CFM from a compact 40 × 28 mm frame
  • 18 000 RPM speed for intense server and workstation cooling
  • 4-pin PWM control enables automatic speed regulation
  • Double ball bearing design extends operational lifespan
  • Wide 4.5–13.8 V operating range suits variable 12 V power rails

Compact 40 mm server fan

The SXDOOL VF40281BX-D180-S9H is a 40 mm case fan built for tight server and workstation chassis. Its 4‑pin PWM connector allows automatic speed regulation so the system can balance airflow against acoustic load. Double ball bearings support continuous high‑speed operation in demanding environments.

Thermals and acoustics

At 18000 RPM the fan moves 24 CFM through a 28 mm thick frame while producing 52.1 dB of noise. The 12 V design operates across a 4.5 V to 13.8 V range and draws a rated current of 1.00 A, giving builders a predictable power envelope for dense cooling layouts.

Build integration

The 40 x 40 mm footprint fits standard 4028 mounting holes, freeing larger fan slots for other components. Four‑wire PWM control lets the motherboard or fan controller adjust speed without extra wiring. It suits servers and compact PCs that need focused airflow in restricted space.

Highlights

  • High airflow of 24 CFM from a compact 40 × 28 mm frame
  • 18 000 RPM speed for intense server and workstation cooling
  • 4-pin PWM control enables automatic speed regulation
  • Double ball bearing design extends operational lifespan
  • Wide 4.5–13.8 V operating range suits variable 12 V power rails

Specifications

TypeCase Fan
Power Connector4 Pin

Questions about this item

How do I connect the 4-pin PWM connector and enable automatic speed regulation on this 40 mm fan?

Plug the 4-pin connector into a motherboard PWM header; the fourth wire carries the PWM signal so the board can vary the 18000 RPM maximum speed automatically.

When will the double ball bearing need replacement under continuous 12 V operation?

Double ball bearings typically run for tens of thousands of hours at 18000 RPM; listen for rising noise above the rated 52.1 dB as the first sign of wear.

At what temperature does the 1.00 A motor hit its thermal limit during sustained 24 CFM airflow?

The motor is rated for a working voltage range of 4.5 V to 13.8 V; staying within that range at 12 V keeps the 1.00 A current within design limits.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.