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Small black 40mm case fan with three-wire connector and double ball bearing

SXDOOL

SXDOOL 1608KL-05W-B39 40mm 24V 3-pin case fan

SKU CH-KQ4G-JQ3NJ MPN 1608KL-05W-B39

A 40 mm, 24 V case fan with dual ball bearings running at 6500–6999 RPM, moving 5–10 CFM at 20–25 dBA, and rated for 50 000 hours service life

  • Fan size40 mm
  • Bearing design2 Ball
  • Rotational speed6500-6,999 RPM
  • Airflow rate5-10 CFM
  • Operating noise20–25 dBA
  • Power input connector3 Pin
  • Compact 40 mm frame fits tight chassis spaces
  • 6500–6999 RPM delivers 5–10 CFM airflow
  • Dual ball bearing rated for 50000 hours service life
  • Quiet 20–25 dBA operation suits noise-sensitive builds
  • 3-pin 24 V connector enables direct speed monitoring

40mm 24V 3-Pin Case Fan

The SXDOOL 1608KL-05W-B39 is a 40mm case fan built by NMB-MAT with a 24V DC input and a 3-pin power connector. It uses a double ball bearing and runs between 6500 and 6999 RPM to deliver 5 to 10 CFM of airflow. Noise is rated at 20 to 25 dBA.

Industrial and CNC Cooling Applications

This fan suits equipment that provides a 24V supply and accepts a 3-pin connection, such as Fanuc servo drives and numerical control machines. It is not for builders who need PWM control, LED illumination or a different voltage rail. The 40mm frame also limits use in standard PC mounts designed for larger fans.

24V DC Operating Voltage

The single specification that decides fit is the 24V DC requirement; the fan draws 0.08A for 1.92W of power. A system must supply this exact voltage and a compatible 3-pin header for the tachometer signal to function correctly.

How it compares

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

Price $11.99
Cheaper than about 85% 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 speed6500-6,999 RPM
Airflow rate5-10 CFM
Power
Power input connector3 Pin
Size & build
Fan size40 mm
Bearing design2 Ball
Environment & compliance
Operating noise20–25 dBA
More details
LED lightingNon-LED

Questions about this item

How do I mount the 40x40x20mm fan and connect the 3-pin lead to a 24V supply?

Align the four corner holes of the 40x40x20mm frame, secure with M3 screws, then plug the 3-pin connector into a 24V DC header; the third wire carries the tachometer signal for speed monitoring.

When will the double ball bearings need replacement?

The bearing assembly is rated for 50000 hours of continuous operation at up to 75°C ambient; plan a swap once runtime approaches that figure.

What thermal limit appears first during sustained 6500-6999 RPM operation?

The 75°C ambient ceiling is reached before the 50000-hour bearing life expires, so enclosure cooling must keep intake air below that temperature.

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