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Small square 40mm case fan black frame 10mm thick double ball bearing 5V three-pin connector 9cm cable

Fans

Fans 1604KL-04W-B40Bearing 40mm 5V Double Ball case fan

SKU CH-SACX-ZKE6E MPN 1604KL-04W-B40Bearing

A 40 mm double-ball-bearing case fan running at 6700 rpm with 6.0 CFM airflow and 29.0 dBA noise on 5 V power

  • Double ball bearing extends lifespan to 180,000 hours MTBF
  • 6700 rpm speed delivers 6.0 CFM airflow
  • Quiet 29.0 dBA noise at full load
  • 5 V operation with 3-6 V range fits many boards
  • Compact 40 × 40 × 10 mm fits tight cases

Compact 40 mm 5 V case fan

The Fans 1604KL-04W-B40 is a 40 mm square frame case fan that runs on 5 V power. It uses a double ball bearing assembly with a custom IC for extended durability. The unit delivers 6.0 CFM airflow at 6700 rpm while producing 29.0 dBA noise. A 9 cm lead with a three-pin connector plugs directly into a motherboard header.

Builders with space-constrained chassis

This fan suits small-form-factor cases, rack-mount appliances or industrial enclosures that only accept 40 mm mounting points. The 5 V operating range of 3–6 V lets it run from standard USB or low-voltage headers. Buyers who need higher static pressure for dense radiators or larger air volume for high-wattage components should look at larger frame sizes.

180 000 hour MTBF rating

The manufacturer specifies a mean time between failures of 180 000 hours, indicating a design focused on continuous operation. This figure is the primary indicator of whether the fan meets the reliability demands of a given deployment. Verify that the 40 mm hole pattern and three-pin connector match the target hardware before purchase.

How it compares

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

Price $35.99
Pricier than about 82% 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 5V 3-pin connector plug directly into a motherboard header without an adapter?

Yes, the 9 cm lead ends in a standard 3-pin plug that fits a 5V motherboard fan header.

What are the exact dimensions and screw-hole spacing for the 40mm frame?

The frame measures 40 by 40 by 10mm; mounting holes follow the standard 40mm fan pattern.

How do you install it so the double-ball bearing lasts the rated 180000 hours?

Mount with the label side facing the airflow direction, secure all four screws evenly, and avoid bending the 9 cm cable sharply at the connector.

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