What Is the Maximum Fin Height and Width for an Aluminum Extruded Heatsink?

The maximum fin height and width of an aluminum extruded heatsink depend on the extrusion capability, aluminum alloy, profile complexity, and thermal requirements. Heat sink manufacturing no universal limit, but typical extrusion designs follow common industry ranges.

Maximum Fin Height

For standard aluminum extrusion heatsinks, the fin height is usually:

• 20–80 mm for common applications

• Up to 120 mm or higher for customized extrusion profiles

Higher fins provide a larger surface area for heat dissipation, but extremely tall fins may reduce extrusion stability and increase manufacturing difficulty.

Maximum Width and Length

The heatsink profile width depends mainly on the extrusion die size and equipment capability.

Typical ranges:

• Width: 20–300 mm for standard designs

• Large custom profiles: 300–700 mm or more

• Length: Can usually be cut according to customer requirements, commonly up to several meters

Factors Affecting Maximum Size

The achievable fin height and width are influenced by:

• Aluminum alloy selection (such as 6063 or 6061)

• Fin thickness and spacing

• Extrusion ratio

• Cooling requirements

• Manufacturing equipment capacity

For example, 6063 aluminum extruded heatsinks are widely used because of their excellent extrusion performance, allowing complex fin structures and customized thermal designs.

Custom Aluminum Extruded Heatsink Solutions

A professional aluminum extruded Heatsink Manufacturer can optimize the fin height, width, and profile design according to your application, including power electronics, EV systems, battery storage, LED lighting, industrial equipment, and communication devices.