WHAT DOES A HEATSINK DO?
A heatsink is a heat exchanger that transfers heat that is generated by an electronic or a mechanical device to a medium where it is dissipated away from the device to keep the device cool to its optimal operating temperature.
There are two types of heatsinks: passive and active.
A passive heatsink has no mechanical components. It dissipates heat through natural convection and it is commonly made of aluminum or copper but different material is also used depending on the design requirements and applications.
An active heatsink is a passive heatsink that relies on external device such as a fan to enhance heat transfer.
Any devices that uses electricity will generate heat, which causes the device to fail due to excessive heating of its electronic components. A heatsink is the most commonly used to eliminate overheating in electronic devices.