Heatsinks

Heat sinks are a type of thermal conductor (or heat exchanger) that absorb and dissipate the heat created by electronic and mechanical devices. Heat sinks use convection, conduction or radiation to disperse heat.


What are heat sinks made of?


Heat sinks are made from metal and typically constructed from copper or aluminium. Copper is an excellent thermal conductor, helping to draw heat away from the device that you are trying to cool. Although aluminium doesn’t conduct heat as well as copper, it is less expensive and lighter than copper. The heat will normally rise through a number of metal fins. Fin designs are used as they provide a greater surface area for the heat to spread across and dissipate.


What would you use a heat sink for?


Heat sinks prevent devices from overheating and are particularly important in protecting electronics such as CPUs. Components subject to too much heat can become irreparably damaged. In the most severe cases overheating components can result in fires, explosions and injury.


What devices can you use heat sinks for?


Heat sinks can be used to cool a large number of devices. For example, CPUs, LEDs, ICs and modules.


What is the difference between a heat sink and cooling fan?


Heat sinks are a piece of metal that conducts heat away from components. Fans forcibly move warm air away from components.


Terminology


A wide variety of heat sinks are available. Passive heat sinks refer to those without a fan, while the term ’active heat sinks’ refer to those with an integrated fan. You may also come across the term HSF which means a heat sink with a fan. Some heat sinks can also be combined with a liquid cooling solution to move heat away from devices. Heat sinks are also frequently spelt as ’heatsinks’.


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Description Price For Use With Length Width Height Dimensions Thermal Resistance Mounting Diameter Colour Application Finish Material Package Type Series
RS Stock No. 2508958840
Mfr. Part No.NTE438
£0.63
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RS Stock No. 2508958828
Mfr. Part No.NTE415
£0.63
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RS Stock No. 2508958856
Mfr. Part No.NTE439
£0.53
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From Fischer Elektronik, the SK 42 standard extrusion ...
Description:
From Fischer Elektronik, the SK 42 standard extrusion heatsink is made from anodised aluminium in a grilled shape. Extruded heatsinks are the most common form of heatsink and are suitable for a range of medium power applications.
The LA ICK series heatsinks stand out due ...
Description:
The LA ICK series heatsinks stand out due to the following characteristics:. Particularly high-quality designIntegrated fan (12 V), allowing a very low height profile17 x 17 pin matrix suitable for processor 80486Fan motor with dual ball bearing mounted axis, ensuring a high level of operational safety and a long service ...
Black anodisedThe kit box option (5040766) contains a ...
Description:
Black anodisedThe kit box option (5040766) contains a range of SMD heatsinks with anodised and solderable surfaces. • Mounting method: thermal adhesive or conductive foil (not included).
ICK BGA series of heatsinks have been designed ...
Description:
ICK BGA series of heatsinks have been designed for use within IC processor heat dissipation. The series can be mounted via thermal adhesive orconductive foil (not included). Features and BenefitsBlack anodised surface.Heatsink dimensions match respective BGA-type.Can be affixed directly on to the BGA component with thermal adhesive or conductive foil ...