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. 867-9039
Mfr. Part No.RPI-COOLINGKIT.9
$7.95
Each
units
Raspberry Pi 1 & 2 - - - - - - - Black - - - - -
RS Stock No. 750-0888
Mfr. Part No.BGA STD 010
$7.41
1 Bag of 5
Bag(s)
BGA 13mm 13.5mm 10mm 13 x 13.5 x 10mm 27K/W Adhesive Foil - Black - - - - -
RS Stock No. 722-6915
Mfr. Part No.SK 487/37,5 SA
$4.18
Each
units
TO-220, TO-247 37.5mm 52.3mm 28mm 37.5 x 52.3 x 28mm 5K/W Clip - Black - - - - -
RS Stock No. 402-995
Mfr. Part No.1.25GY-50
$3.136
Each (In a Pack of 10)
units
TO-220 60mm 32mm 16mm 60 x 32 x 16mm 6.8°C/W Screw - Black - - - - -
RS Stock No. 403-184
Mfr. Part No.437874
$1.55
Each (In a Pack of 10)
units
TO-218, TO-220, TO-247 12.5mm 34.5mm 50mm 12.5 x 34.5 x 50mm 8.8K/W Solder - Black - - - - -
RS Stock No. 674-4747
Mfr. Part No.ICK BGA 10x10x10
$2.86
Each
units
BGA 10mm 10mm 10mm 10 x 10 x 10mm 28.5K/W Adhesive Foil, Conductive Foil - Black - - - - -
RS Stock No. 750-0908
Mfr. Part No.BGA STD 050
$9.59
1 Bag of 5
Bag(s)
BGA 20mm 20mm 19.1mm 20 x 20 x 19.1mm 14K/W Adhesive Foil - Black - - - - -
RS Stock No. 402-709
Mfr. Part No.P35/250A
BrandSemikron
$107.52
Each
units
- 250mm 200mm 40mm 250 x 200 x 40mm 0.41K/W - - Black - - - - -
RS Stock No. 271-870
Mfr. Part No.350AB1500B
$54.75
Each
units
- 150mm 125mm 50mm 150 x 125 x 50mm 0.5K/W - - Black - - - - -
RS Stock No. 903-3157
Mfr. Part No.113AB2000B
$59.04
Each
units
- 200mm 150mm 25mm 200 x 150 x 25mm 0.31°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - 100
RS Stock No. 712-4320
Mfr. Part No.575200B00000G
$1.078
Each (In a Pack of 5)
units
TO-92 - 15.29mm 18.29mm - 60°C/W Plug-On Collar - Black - Black Anodized - - -
RS Stock No. 263-251
BrandRS PRO
$2.444
Each (In a Pack of 10)
units
TO-220 20mm 35mm 20mm 20 x 35 x 20mm 17.9°C/W - - - - - Aluminium - -
RS Stock No. 674-4712
Mfr. Part No.SK454-100SA
$2.61
Each
units
SOT-32, TO-220 100mm 21.45mm 19mm 100 x 21.45 x 19mm 6K/W - - Black - - - - -
RS Stock No. 505-2876
Mfr. Part No.P3/300B
BrandSemikron
$212.28
Each
units
Isolated Power Modules 300mm 125mm 135mm 300 x 125 x 135mm 0.14K/W - - Natural - - - - -
RS Stock No. 189-8432
Mfr. Part No.SK58-50-SA
$10.73
Each
units
- 50mm 150mm 27mm 50 x 150 x 27mm 1.7K/W - - Black - - - - -
RS Stock No. 271-864
Mfr. Part No.345AB1000B
$37.68
Each
units
- 100mm 120mm 37mm 100 x 120 x 37mm 1K/W - - Black - - - - -
RS Stock No. 780-5893
Mfr. Part No.ILA-HSINK-STAR-50X20MM-BLK-K
$21.97
Each
units
Dragon 1+ PowerStar, Duris 1+ PowerStar, Duris 4+ PowerStar, OSLON 1+ PowerStar, OSLON 4+ PowerStar, Stanley 1 PowerStar, Stanley 4 PowerCluster - - 20mm 50 (Dia.) x 20mm - Screw 50mm Black - - - - -
RS Stock No. 722-6896
Mfr. Part No.SK 574/25 SA
$4.44
Each
units
TO-220, TO-247 25mm 32.3mm 28mm 25 x 32.3 x 28mm 7.5K/W Clip - Black - - - - -
RS Stock No. 389-3451
Mfr. Part No.FHP08
$18.51
Each
units
- 61.8mm 50mm 32mm 61.8 x 50 x 32mm - - - - - - - - -
RS Stock No. 692-0660
Mfr. Part No.LA 7 100 24 V
$199.44
Each
units
IGBT 100mm 125mm 74mm 100 x 125 x 74mm 0.12K/W - - - - - - - -
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