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Small black square axial fan forty by forty millimetres twenty millimetres thick with wire leads

Fans

Fans AFB0405LDSize case fan 40x40x20mm 5V 0.21A 5500RPM 26dBA

SKU CH-VS5R-XFFGD MPN AFB0405LDSize

A 40 mm square, 20 mm deep axial case fan running at 5500 RPM with a 26 dBA noise rating on 5 V power

  • Compact 40×40×20 mm footprint fits tight builds
  • 5500 RPM airflow at only 26 dBA noise
  • 5 V / 0.21 A draw keeps power use low
  • Double-ball bearing rated for 60 000 hours life
  • Operates reliably from –20 °C to 75 °C

Compact 40 mm axial fan for tight spaces

This 40x40x20 mm axial fan fits narrow chassis, small form-factor builds and embedded devices where larger coolers cannot be installed. It targets system integrators and hobbyists who need directed airflow across heat exchangers or component clusters without increasing case depth.

Quiet 26 dBA operation at 5 V

Running at 5500 RPM from a 5 V supply, the fan draws 0.21 A for 1.05 W of power while producing 26 dBA of noise. The double-ball bearing design supports a 60 000-hour service life across an operating range of -20 to 75 °C, keeping thermals steady without audible distraction.

Two-wire 5 V connection simplifies wiring

The fan connects directly to any 5 V header or DC source, requiring no PWM controller or additional circuitry. Its 20 mm frame depth leaves clearance for adjacent cards or ducting, while the axial layout pushes air straight through heatsinks instead of deflecting it sideways.

Ciri-ciri utama

  • Compact 40×40×20 mm footprint fits tight builds
  • 5500 RPM airflow at only 26 dBA noise
  • 5 V / 0.21 A draw keeps power use low
  • Double-ball bearing rated for 60 000 hours life
  • Operates reliably from –20 °C to 75 °C

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How do I mount the 40x40x20mm fan and which step is often missed?

Use four 3 mm screws through the corner holes; the step most people miss is checking screw length so the threads do not hit the internal rotor.

What maintenance or replacement will the AFB0405LDSize need later?

The double-ball bearing is rated for 60,000 hours at 40 °C; after that the fan should be replaced because the bearings are not user-serviceable.

What limit appears first when the fan runs continuously at 5500 RPM?

Bearing life is the first limit; the 60,000-hour rating assumes ambient temperatures up to 75 °C, and higher temperatures will reduce that interval.

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