We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Tiny square blower fan with black plastic housing

CAFELE

CAFELE RFB1804 18x18x4mm 5V 0.05A Nano Blower Fan

SKU CH-V87V-RRTX0

Ultra-compact 5 V blower fan measuring 18 mm square draws only 0.05 A for silent cooling in tight spaces

  • Product typeCase Fan
  • Ultra-compact 18×18×4 mm footprint fits tight enclosures
  • Low 5 V, 0.05 A draw suits USB or battery power
  • Silent blower operation keeps noise minimal in quiet builds
  • Focused airflow targets PM2.5 sensors or drone hot-spots
  • Solid-state switch control enables simple on/off or PWM speed regulation

Compact 5 V blower for tight spaces

The CAFELE RFB1804 is an 18 mm square blower just 4 mm thick that runs on 5 V at 0.05 A. Its miniature frame delivers focused airflow where full-size case fans cannot fit.

Suits embedded builds and sensor cooling

This fan serves developers adding active cooling to PM2.5 detectors, small drones or other space-constrained electronics. Builders who need high static pressure for radiators or large-volume case airflow should look at larger models.

5 V 0.05 A power rating

The blower draws only 0.05 A at 5 V so it can be powered directly from a microcontroller header or a USB port. Verify that your board can supply this current before connecting.

How it compares

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

Price $20.99
Typical for this category: the median of 8,339 items is $19.99.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Product typeCase Fan

Questions about this item

Does the 5 V 0.05 A rating mean I can power the RFB1804 directly from a standard motherboard fan header?

Yes — the blower draws only 0.05 A at 5 V, well within the current limit of a typical 5 V fan header, so no external adapter is required.

Will the 18 mm square frame line up with the mounting points on my existing 18 mm fan cut-out?

The RFB1804 measures 18×18 mm, so it matches the same footprint and screw spacing as other 18 mm fans you may already have installed.

How can I confirm the blower is spinning at the correct speed after installation?

Connect the fan, power the system, and verify airflow from the outlet; the unit is rated for silent operation, so you should hear only a faint whir with no rattling or vibration.

More in PC Cooling Fans

Similar items