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Small square copper and aluminium CPU cooler with 40mm fan

SXDOOL

SXDOOL FD124020MB-H 4020 12V 0.12A 4CM double ball CPU cooler

SKU CH-YW69-HR0TC

A 40 × 40 × 20 mm copper-and-aluminium heatsink with a 12 V, 0.12 A double-ball-bearing fan for CPU cooling

  • Compact 40 × 40 × 20 mm footprint fits tight builds
  • Copper and aluminium heatsink draws heat from the CPU
  • Double-ball bearing fan runs at 12 V and 0.12 A for quiet operation
  • Three-wire connector enables speed monitoring and control
  • Light 0.8 kg package keeps overall system weight low

Compact 40 mm Copper-Aluminium Cooler

The SXDOOL FD124020MB-H is a 40 mm square CPU air cooler that combines a copper base with aluminium fins and a double-ball-bearing fan. It draws 0.12 A at 12 V through a three-wire connection and is built for small-form-factor systems where height clearance is below 20 mm.

Replacing Stock Low-Profile Coolers

This unit steps up from basic OEM coolers that use sleeve bearings or thinner fin stacks, offering longer bearing life and better heat spread from the copper base. The upgrade makes sense when the existing cooler cannot keep temperatures stable under sustained load in a 1U or mini-ITX chassis.

Straightforward Three-Wire Mount

Installation uses the standard three-wire header and the supplied mounting hardware, so no adapter cables are required. The most common issue is interference with tall memory modules or VRM heatsinks that sit close to the socket, so verify clearance before fitting.

Highlights

  • Compact 40 × 40 × 20 mm footprint fits tight builds
  • Copper and aluminium heatsink draws heat from the CPU
  • Double-ball bearing fan runs at 12 V and 0.12 A for quiet operation
  • Three-wire connector enables speed monitoring and control
  • Light 0.8 kg package keeps overall system weight low

Specifications

No published specifications for this item yet.

Questions about this item

What are the exact dimensions of the 4020 cooler so I can check clearance in my case?

The unit measures 40 by 40 by 20 mm, matching the standard 4020 form factor.

How do I connect the three-wire lead to the motherboard header?

Align the keyed three-pin connector with the CPU fan header and press straight down; the missing pin prevents reverse insertion.

When should I consider replacing the double ball bearing fan?

Replace it if the 12 V 0.12 A motor becomes noisy, vibrates, or no longer spins at full speed.

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