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Small square black plastic 40 mm case fan with two wires

Fans

Fans 4020 40x40x20mm 24V 1.54W 2-Wire case fan

SKU CH-MB9K-RF71H

Compact 40×40×20 mm case fan running at 24 V with 1.54 W power draw and a simple 2-wire connection

  • Compact 40 × 40 × 20 mm fits tight spaces
  • 24 V operation suits industrial and server chassis
  • 54 W draw keeps power budgets low
  • Two-wire connection simplifies installation

Compact 24V 40mm case fan

The 4020 frame measures 40 by 40 by 20 millimetres and runs on a 24 volt supply. It draws 1.54 watts through a simple two-wire connection. The unit is supplied new and fits standard 40 millimetre mounting points.

For tight chassis and 24V systems

Builders working with small-form-factor cases or 24 volt power rails can use this fan directly. Buyers who need PWM speed control, a three or four wire header, or higher airflow for larger enclosures should look at other models.

Highlights

  • Compact 40 × 40 × 20 mm fits tight spaces
  • 24 V operation suits industrial and server chassis
  • 54 W draw keeps power budgets low
  • Two-wire connection simplifies installation

Specifications

No published specifications for this item yet.

Questions about this item

What does the 1.54W power rating mean for cooling performance in a live system?

At 1.54W the fan moves a modest volume of air, suited to spot-cooling a hotspot or exhausting a small chassis rather than serving as primary case airflow.

How does the 2-wire 24V interface affect speed control options?

The two-wire 24V connection provides power only, so speed is fixed unless an external voltage regulator or PWM controller is added between the supply and the fan.

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