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Small black square axial fan with wire lead

Fans

Fans EFB0405VHDSize 4020 40mm 5V 0.50A case fan

SKU CH-YBQY-R235K MPN EFB0405VHDSize

A 40 mm axial case fan delivering 9.43 CFM at 8200 RPM with 30.5 dBA noise

  • Double ball bearing for reliable long-life operation
  • 5 V 0.50 A input for efficient low-power cooling
  • 8200 RPM delivers 9.43 CFM airflow in tight spaces
  • 5 dBA keeps noise low for quiet builds
  • 20 cm lead allows flexible routing in compact cases

Compact 5 V chassis fan

The Delta EFB0405VHD measures 40×40×20 mm and runs from a 5 V supply drawing 0.50 A. Its double ball bearing and 20 cm lead suit tight server, inverter or embedded enclosures where a low-voltage axial fan is required.

Sustained airflow at 8200 RPM

At the rated speed of 8200 ± 10 % RPM the fan delivers 9.43 CFM continuously, making it suitable for constant air exchange through heat exchangers rather than short bursts. The axial design maintains steady throughput in space-constrained cooling paths.

30.5 dBA acoustic profile

Operating noise is specified at 30.5 dBA while moving air at the rated volume. Power draw stays at 5 V × 0.50 A, so thermal contribution remains modest in densely packed chassis.

How it compares

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

Price $33.99
Pricier than about 81% 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

How loud is the 30.5dBA noise level when this 5V fan runs continuously?

The fan produces 30.5dBA at 8200 RPM, which is a quiet operating level suitable for constant use in noise-sensitive environments.

What power connector and voltage does the EFB0405VHD require to operate?

It runs on 5V DC drawing 0.50A through a 20cm lead; ensure your board or controller provides a 5V header capable of at least 0.50A.

Will the 40mm double ball bearing design fit alongside legacy 4020 chassis fans in an older enclosure?

Yes, the 40*40*20mm frame matches the standard 4020 footprint, so it aligns with existing mounting holes and airflow paths in older cases.

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