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Small 40 mm square 12 V cooling fan with black plastic frame and blades

Fans

Fans 4015 4CM 12V 1606KL-04W-B59 case fan

SKU CH-MHV5-YRRG5

A 4 cm 12 V cooling fan for industrial computers, servers and switches

  • Compact 4 cm frame fits tight server chassis
  • 12 V power suits standard industrial power rails
  • NMB 1606KL-04W-B59 model built for continuous operation
  • 4015 series design targets switch and server cooling

40 mm 12 V case fan

This 40 mm fan runs on 12 V power and fits industrial computers, servers and network switches. The compact frame suits tight chassis where larger coolers cannot be installed. It is built for continuous operation in demanding environments.

Capacity and headroom

The small diameter moves enough air for low-heat components such as embedded boards or switch ASICs. It will not provide sufficient flow for high-wattage CPUs or multi-GPU configurations that need larger surface area.

How it compares

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

Price $9.99
Cheaper than about 91% 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 the 40 mm frame of this fan fit the mounting holes on my older 1U server chassis?

The fan uses a standard 4015 form factor measuring 40 mm square by 15 mm thick, matching the screw spacing found on most legacy 1U server and switch enclosures.

How can I verify the 1606KL-04W-B59 is spinning at the correct speed after installation?

Connect the fan to a 12 V header, then check the RPM reading in your server’s IPMI or BIOS hardware monitor; it should report a steady value consistent with the model’s rated speed.

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