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Small black 40mm square case fan with four-pin connector

SXDOOL

SXDOOL 40mm 4-pin case fan >7000 RPM 25-30 CFM

SKU CH-WNH9-YZEH0

40 mm case fan spins above 7000 RPM for 25–30 CFM airflow at 25–30 dBA with a 4-pin connector

  • Fan size40 mm
  • Rotational speed>7,000 RPM
  • Airflow rate25-30 CFM
  • Operating noise25–30 dBA
  • Power input connector4 Pin
  • Product typeCase Fan
  • High airflow up to 30 CFM from a 40 mm frame
  • PWM 4-pin control keeps speeds above 7000 RPM precise
  • Quiet operation at 25-30 dBA even at full speed
  • Double ball bearing rated for 100000 hours continuous use
  • Compact 40x40x28 mm size fits tight server and SFF builds

40mm 4-pin server fan

The SXDOOL 40mm case fan is a 12 V PWM cooler designed for tight server chassis and compact workstations. Its 40 x 40 x 28 mm frame fits the standard 4028 mounting pattern used in many 1U and blade systems. Double ball bearings support a rated 100,000 hour operating life at continuous duty.

>7000 RPM airflow

At speeds above 7000 RPM the impeller delivers 25 to 30 CFM while drawing 8.0 W. The four pin connector provides PWM speed control and tachometer feedback so the system can balance cooling against acoustic limits. Measured noise sits between 25 and 30 dBA at full rate.

Suits high density builds

This fan suits integrators populating dense rack gear or refreshing legacy Sunon PMD1204PQBX-A slots where 40 mm depth is fixed. Builders needing larger diameter rotors, lower RPM ranges or different mounting hole spacings should look at other form factors.

How it compares

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

Price $9.99
Cheaper than about 91% 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
Performance
Rotational speed>7,000 RPM
Airflow rate25-30 CFM
Power
Power input connector4 Pin
Size & build
Fan size40 mm
Environment & compliance
Operating noise25–30 dBA

Questions about this item

What does the >7000 RPM rating deliver in a typical chassis?

The fan pushes 25-30 CFM through a 40 mm frame, so it suits tight server or workstation slots where high static pressure matters more than raw volume.

How does the 4-pin connector control speed in practice?

The PWM line lets the motherboard vary voltage from 0 to 12 V, so the motor spins only as fast as the thermal curve demands.

Will the 40 x 40 x 28 mm frame fit my 40 mm mounting holes?

Yes — the body matches the standard 40 mm square pattern and the 28 mm depth clears most low-profile brackets.

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