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Small black square 40x40mm DC 5V 3-wire case fan

Fans

Fans 109P0405H9D08 40x40x10mm DC 5V 3-wire case fan

SKU CH-HPBN-3FAV5

Compact 40 mm square case fan runs on 5 V DC with a three-wire connection

  • Compact 40x40x10 mm footprint fits tight builds
  • 5 V DC power suits low-voltage systems
  • 3-wire connector enables speed monitoring
  • 160 A draw keeps energy use low

Compact 40 mm DC fan for tight builds

This 40 mm square frame fits the 109P0405H9D08 into small chassis where larger coolers cannot go. It runs on 5 V DC and draws 0.160 A, so a standard motherboard header or 5 V rail can power it directly. The three-wire connection supplies tachometer feedback for speed monitoring. New condition means the bearings and blades arrive unused.

Replaces noisy or failed 40 mm units

Swap this in when an original 40x40x10 mm fan has worn out or become loud, restoring airflow without modifying mount points. The jump is worth it if the existing fan no longer spins reliably or if you need the tachometer signal for fan-curve control. Builders who need higher static pressure, larger frame sizes or PWM control should look elsewhere.

How it compares

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

Price $23.99
Pricier than about 60% of the 8,339 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Does the 40 mm square frame with 10 mm depth fit my chassis fan mounts?

The fan measures 40 mm by 40 mm by 10 mm, so it fits any mount drilled for that exact footprint.

How do I connect the 3-wire lead to a 5 V header without reversing polarity?

Match the keyed 3-wire plug to the motherboard header; the notch forces correct orientation, and the tach wire sits on the signal pin.

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