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Small black square case fan forty by forty by fifteen millimetres with three pin connector

Fans

Fans 1606KL-05W-B40Voltage 24V 0.07A 40x40x15mm case fan

SKU CH-30RA-ZDGM1 MPN 1606KL-05W-B40Voltage

A 40 x 40 x 15 mm case fan delivers 7.4 CFM at 6500 RPM with 25.5 dBA noise

  • Air Flow7.4CFM
  • Low noise operation at 25.5 dBA for quiet environments
  • High airflow of 7.4 CFM keeps components cool
  • 24 V 0.07 A draws minimal power from the supply
  • 6500 RPM speed delivers strong cooling performance
  • Rated 50000 hours service life for long-term reliability

Compact 40 mm Axial Fan

The NMB 1606KL-05W-B40 is a 24 V axial case fan measuring 40 by 40 by 15 millimetres. It draws 0.07 A and connects through a standard three-pin header on the motherboard. The unit is built for continuous operation in industrial, medical and embedded systems where space is tight.

6500 RPM Speed Limit

At 6500 revolutions per minute the fan delivers 7.4 CFM of airflow with a static pressure of 42.2 pascals. Acoustic output reaches 25.5 decibels, which is audible in quiet rooms but low for this speed class. The three-pin interface provides power and tachometer feedback without pulse-width modulation control.

50000 Hour Service Life

Rated for 50000 hours at ambient temperatures from minus twenty to seventy-five degrees Celsius, the fan suits long-duty cycles in CNC machines, rail vehicles and new-energy platforms. It handles steady-state cooling for compact electronics but lacks the airflow headroom for high-density processor heatsinks or multi-GPU enclosures. Buyers needing greater static pressure or PWM regulation should look elsewhere.

Highlights

  • Low noise operation at 25.5 dBA for quiet environments
  • High airflow of 7.4 CFM keeps components cool
  • 24 V 0.07 A draws minimal power from the supply
  • 6500 RPM speed delivers strong cooling performance
  • Rated 50000 hours service life for long-term reliability

Specifications

Air Flow7.4CFM

Questions about this item

Which voltage version should I pick for a 24 V system?

The 24 V model draws 0.07 A and fits a standard three-pin header on the main board.

What does the 7.4 CFM airflow figure mean once the fan is installed?

It moves roughly 0.21 cubic metres of air per minute at 6500 RPM while producing 42.2 Pa of static pressure.

What does the three-pin interface limit in practice?

It supplies fixed 24 V power and a tachometer signal but no PWM speed control, so the fan runs at its rated 6500 RPM continuously.

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