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Small square 40mm computer case fan with black frame and transparent blades

Fans

Fans 40mm 5V Case Fan 4020

SKU CH-3GB8-RB07X

A 40 mm 5 V case fan designed for silent cooling in servers and inverters

  • Compact 40 mm frame fits tight server chassis
  • 5 V operation powers directly from standard headers
  • Silent running suits noise-sensitive environments
  • 4020 form factor matches AUB0405HD replacement needs

40 mm 5 V Case Fan for Servers

This 4020 form-factor fan measures 40 mm square and runs on a 5 V supply. It is designed for silent operation inside switch and inverter enclosures. The compact size fits tight chassis where larger coolers cannot be installed.

Buyers needing a drop-in replacement

The unit targets maintainers refreshing legacy server or networking gear that specifies this exact model. Users who need PWM control, a different voltage or a larger frame will not find those features here.

How it compares

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

Price $16.99
Cheaper than about 60% of the 8,338 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What power connector does the 5 V fan need?

The fan runs on 5 V DC; check that your motherboard or controller provides a 5 V header or a compatible Molex adapter.

Will the 40 mm frame fit the same mounting holes as my existing 4020 fans?

Yes, the 40 mm square frame matches the standard 4020 mounting pattern, so it aligns with the screw holes used by other 4020 models.

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