Aluminum Heat Sink 40x40x11mm Green Anodized Cooling Radiator for IC CPU GPU LED Driver Router PCB, DIY Electronics Heat Dissipation Thermal Management

Overview

This 40x40x11mm aluminum heat sink is designed to improve heat dissipation for small to mid-size heat sources commonly found in DIY electronics and embedded systems. The compact square footprint makes it a practical choice for PCB-mounted components where space is limited, while the tall fin structure increases exposed surface area to help transfer heat to surrounding air. The green anodized coating adds surface durability and corrosion resistance, making it suitable for long-term use in hobby, lab, and light industrial environments.

Technical Details

A heat sink works by conducting heat away from a hot component through its base, then spreading that heat into fins where it is removed by convection. Performance depends heavily on the quality of the thermal interface (pad/tape/paste), the flatness of the mating surfaces, mounting pressure, airflow, and the actual power dissipation of the device being cooled. This unit uses an aluminum body for a strong balance of thermal conductivity, weight, and cost. The fin array is optimized for passive cooling scenarios (natural convection) and can also benefit from forced airflow (small fan or system airflow) when available.

For best results:

• Ensure the component top surface is clean and flat; remove dust, oils, and flux residue.
• Use an appropriate thermal interface material (TIM): thermal tape/pad for convenience, or thermal paste with a mechanical clamp for maximum performance.
• Avoid electrical shorts: aluminum is conductive. If the target component has exposed conductive surfaces or nearby pins, use an electrically insulating thermal pad or ensure adequate clearance.
• Verify clearance height: the 11mm height plus any adhesive thickness must fit your enclosure and not interfere with adjacent parts.

Specifications

• Product type: Passive aluminum heat sink / cooling radiator
• Material: Aluminum (alloy varies by production batch)
• Surface finish/color: Green anodized (shade may vary by batch)
• Overall dimensions: 40mm x 40mm x 11mm
• Mounting method: Thermal tape, thermal pad, thermal paste + clamp, or suitable adhesive (not included)
• Electrical properties: Electrically conductive (use insulation where required)
• Operating environment: Depends on installation, airflow, and system temperature; check your device datasheet for allowable junction/case temperatures

Applications

• Cooling for ICs and processors on development boards and embedded systems (SBCs, microcontroller boards)
• LED driver modules, DC-DC converters, MOSFETs, voltage regulators, and power amplifier stages
• Router/modem/TV box thermal upgrades where internal hotspots cause throttling or instability
• 3D printer electronics, motor driver boards, and compact robotics controllers
• General PCB heat spreading for prototypes, repairs, and custom enclosures

Integration Notes

• Choose the TIM based on your needs: thermal tape is fast and clean; paste requires a retention method but can improve thermal contact.
• If mounting to a component with a plastic package, confirm the package is intended for heat sinking and that the top surface can safely transfer heat (check datasheet).
• Consider airflow direction: fins perform best when air can move through channels; avoid blocking the fin field with cables or foam.
• If multiple heat sources exist, ensure the heat sink does not bridge components unintentionally or create mechanical stress on solder joints.

Included Components

1x Aluminum Heat Sink 40x40x11mm (Green)