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Small square blower fan 40x40x10mm black plastic housing three wires

Ruth's sister

Ruth's sister 4010 blower fan 40x40x10mm 5V 0.25A

SKU CH-2S70-VC5P7

A 40 × 40 × 10 mm blower fan running on 5 V DC at 0.25 A with a three-wire connection

  • Compact blower design fits tight 40 mm spaces
  • 5 V 0.25 A draws minimal power from the rail
  • 10 mm slim profile clears low-clearance builds
  • Three-wire connection enables speed monitoring

Compact blower for tight builds

This 40 mm blower fits the 40x40x10 mm footprint and runs on 5 V at 0.25 A. The three-wire connection provides speed feedback for monitoring. It targets system integrators and hobbyists who need directed airflow in confined enclosures.

4010 form factor limits heat load

The small frame and 5 V supply restrict the volume of air the fan can move, so it handles low-power components and spot cooling. It runs out of headroom when tasked with high-wattage CPUs or multi-GPU configurations that demand greater static pressure.

How it compares

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

Price $12.99
Cheaper than about 80% 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

Will this 4010 blower fan fit alongside the 40 mm fans I already have?

Yes, it shares the 40 x 40 x 10 mm footprint so it mounts in the same cut-outs as other 4010 fans.

How can I confirm the blower is running correctly after I connect the three-wire lead?

The third wire reports speed; check your BIOS or fan-control software for an RPM reading that matches the 5 V, 0.25 A rating.

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