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Black 40mm square DC fan with ball bearing and three wires

OEM Industries

OEM Industries BP401005H 40mm Ball Bearing Fan

SKU CH-6B3B-A9H8C

A 40 mm ball-bearing fan delivering 10 to 15 CFM at 5500 to 5999 RPM on 5 V power

  • Fan size40 mm
  • Bearing designBall
  • Product colorBlack
  • Product typeFan only
  • 40 mm frame fits tight build spaces
  • ball bearing design extends operating life
  • 5500 to 5999 rpm delivers strong airflow
  • 10 to 15 cfm moves heat efficiently
  • 3 wire connection enables speed monitoring

Compact 40mm Ball Bearing Fan

The OEM Industries BP401005H is a 40mm square DC fan built for tight spaces inside small-form-factor PCs or embedded boards. It runs on 5 V and draws 0.23 A through a standard three-wire connector. The black frame and blade design suit low-profile CPU coolers where height clearance is limited.

5500 to 5999 RPM Speed Range

The single specification that determines fit is the rotational speed band of 5500 to 5999 rpm. At that speed the fan moves 10 to 15 cfm of air, which matches the thermal envelope of many low-power processors. Builders targeting higher-wattage CPUs should look for a larger or faster cooler instead.

Steady Airflow Under Continuous Load

Ball bearings keep friction consistent during long running periods, so the 10 to 15 cfm airflow does not degrade as the fan warms up. The three-wire connection allows the motherboard to monitor RPM and adjust voltage for stable cooling across extended workloads.

How it compares

Measured against everything we stock in CPU Coolers & Heatsink Fans, at today’s prices. Recalculated every night.

Price $15.99
Cheaper than about 80% of the 1,559 comparable items (median $19.99).
Fan size 40 mm
Lower than about 90% of the 812 comparable items (median 80 mm).

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Specifications

Product
Model nameBP401005H
Product colorBlack
Product typeFan only
Size & build
Fan size40 mm
Bearing designBall
More details
LED lightingNo

Questions about this item

What airflow does the 5500-5999 rpm speed actually deliver inside a case?

The fan moves 10-15 cfm at that speed range, suitable for targeted component cooling in tight spaces.

What does the 3-wire 5V 0.23A connection limit for speed control?

The third wire provides RPM monitoring only; voltage control is the sole way to adjust speed on this 5V fan.

Will the 40mm square frame fit standard 40mm mounting holes?

Yes, the 40mm square frame matches common 40mm fan mounting patterns for direct screw installation.

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