Copper Heatsink

A copper heatsink has a higher thermal conductivity at ~400 W/(mK) compared to an aluminium extrusion at ~ 200 W/(mK), making it more suitable for thermally critical components where the copper better conducts the heat from the component to the heatsink fins.

Radian Thermal Products is a maufacturer of copper heatsinks, designed to withstand extreme heat and provide reliable thermal management for various industrial applications.

Copper is an excellent conductor of heat and Radian uses Cu1100 which has a thermal conductivity of ~ 380W/m-K. Despite the excellent thermal properties of a copper, aluminium weighs approximately a third of aluminium and is less expensive, making aluminium the preferred choice for low power devices. Although it is possible to machine a copper heatsink, this can be fairly inefficient as the tools blunt fairly quickly. Typical manufacturing is by either the forged or skiving process that allow the copper heatsink to made from a single block. Another manufacturing process that is used especially with vapor chambers is the use of stamped copper fins that are soldered or epoxied onto the base. Many of our customers also add an anti-oxidation coating, or nickel plate to maintain the look of the copper heatsinks as they can tarnish over time.