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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RS-artikelnummer 706-6420
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TEP-75WI 61mm 57.9mm 11.4mm 61 x 57.9 x 11.4mm - Screw - - - - - - -
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Universal Square Alu 14mm 14mm 6mm 14 x 14 x 6mm 29K/W Adhesive Foil, Conductive Foil - Black - - Aluminium BGA -
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Universal Square Alu 35mm 35mm 14mm 35 x 35 x 14mm 9.6K/W Adhesive Foil, Conductive Foil - Black - - Aluminium PGA -
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Universal Rectangular Alu 8mm 8mm 6mm 8 x 8 x 6mm 74K/W - - Black - - Aluminium DIL-IC -
RS-artikelnummer 912-5004
Tillv. art.nrILA-HSNK-190x90x50mm-BLK
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RS-artikelnummer 189-8561
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Tillv. art.nrILA-HSINK-RADL-70X20MM-BLK
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SCOB - - 20mm 70 (Dia.) x 20mm - - 70mm - - - - LED -
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Tillv. art.nrKL 112.25.B SW
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Tillv. art.nrICK S 10x10x12,5
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Universal Square Alu 10mm 10mm 12.5mm 10 x 10 x 12.5mm 26.3K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
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Tillv. art.nrLAM 5 50 24
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Universal Rectangular Alu with fan 50mm 50mm 50mm 50 x 50 x 50mm 0.72K/W PCB Mount - Natural - - Aluminium - -
RS-artikelnummer 692-0597
Tillv. art.nrLA 17 150 24 V
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Universal Rectangular Alu with fan 150mm 122mm 120mm 150 x 122 x 120mm 0.075K/W - - - - - Aluminium - -
RS-artikelnummer 722-6874
Tillv. art.nrSK 480/50 SA
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- 50mm 28mm 10.3mm 50 x 28 x 10.3mm 10K/W Clip - Black - - - - -
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Tillv. art.nr591202B00000G
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1/8 Brick DC/DC Converter 57.9mm 22.9mm 11.4mm 57.9 x 22.9 x 11.4mm - Screw - - - - - - -