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. 263-251
BrandRS PRO
£0.813
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. 263-245
BrandRS PRO
£0.328
Each (In a Pack of 10)
Units
TO-220 25.4mm 20.3mm 6.81mm 25.4 x 20.3 x 6.81mm 24°C/W Clip - - - - - - -
RS Stock No. 176-4176
BrandRS PRO
£0.265
Each (In a Pack of 10)
Units
TO-220 25.4mm 34.9mm 12.7mm 25.4 x 34.9 x 12.7mm 5.8 (Forced)°C/W Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-3945
BrandRS PRO
£353.42
1 Box of 1000
Box(es)
TO-218, TO-220, TO-247 25.4mm 41.9mm 38.1mm 25.4 x 41.9 x 38.1mm 3.3 (Forced) °C/W, 6.3 (Natural) °C/W Vertical - Black - Black Anodized Aluminium - RSAW294
RS Stock No. 176-4189
BrandRS PRO
£0.548
Each (In a Pack of 5)
Units
TO-218, TO-220, TO-247 25.4mm 41.9mm 25.4mm 25.4 x 41.9 x 25.4mm 3.1 (Forced) °C/W, 8.7 (Natural) °C/W Vertical - Black - Black Anodized Aluminium - RSAW294
RS Stock No. 176-3950
BrandRS PRO
£497.92
1 Box of 2000
Box(es)
TO-220 38.1mm 34.9mm 12.7mm 38.1 x 34.9 x 12.7mm 5.5 (Forced)°C/W Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-4182
BrandRS PRO
£0.108
Each (In a Pack of 20)
Units
TO-218, TO-220 19.1mm 19.1mm 9.5mm 19.1 x 19.1 x 9.5mm 24.5 (Natural) °C/W, 7.2 (Forced) °C/W - - Black - Black Anodized Aluminium - RSAW294
RS Stock No. 176-4168
BrandRS PRO
£0.135
Each (In a Pack of 20)
Units
TO-220 19.1mm 14.5mm 12.7mm 19.1 x 14.5 x 12.7mm 28.5 (Natural) °C/W, 7.5 (Forced) °C/W - - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-4194
BrandRS PRO
£2.02
Each
Units
Half Brick DC / DC Converter 61mm 57.9mm 11.4mm 61 x 57.9 x 11.4mm 2.1 (Forced)°C/W Vertical - Black - Black Anodized Aluminium - RSAW294
RS Stock No. 176-4179
BrandRS PRO
£2.83
Each
Units
DC/DC Quarter Brick 57.9mm 36.8mm 11.5mm 57.9 x 36.8 x 11.5mm 2.3 (Forced)°C/W - - Black - Black Anodized Aluminium - RSAW294
RS Stock No. 176-4151
BrandRS PRO
£2.40
Each
Units
ASIC, BGA, CPU, LGA 43.2mm 44.5mm 16.5mm 43.2 x 44.5 x 16.5mm 2 (Forced)°C/W - - Black - Black Anodized Aluminium - RSAW294
RS Stock No. 176-3939
BrandRS PRO
£70.31
1 Box of 1000
Box(es)
TO-220 19.1mm 13.2mm 12.7mm 19.1 x 13.2 x 12.7mm 25 (Natural) °C/W, 7 (Forced) °C/W - - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-3943
BrandRS PRO
£409.41
1 Box of 3000
Box(es)
TO-220 15.2mm 13.6mm 12.7mm 15.2 x 13.6 x 12.7mm 11 (Forced) °C/W, 29 (Natural) °C/W - - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-4172
BrandRS PRO
£0.416
Each (In a Pack of 5)
Units
TO-218, TO-220, TO-247 25.4mm 41.9mm 38.1mm 25.4 x 41.9 x 38.1mm 3.3 (Forced) °C/W, 6.3 (Natural) °C/W Vertical - Black - Black Anodized Aluminium - RSAW294
RS Stock No. 176-4162
BrandRS PRO
£0.844
Each (In a Pack of 5)
Units
TO-3 46.4mm 46.4mm 33.3mm 46.4 x 46.4 x 33.3mm 2 (Forced) °C/W, 2 (Natural) °C/W - - Black - Black Anodized Aluminium TO-3 RSAW294
RS Stock No. 176-4165
BrandRS PRO
£0.166
Each (In a Pack of 10)
Units
TO-220 15.2mm 13.6mm 12.7mm 15.2 x 13.6 x 12.7mm 11 (Forced) °C/W, 29 (Natural) °C/W - - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-4150
BrandRS PRO
£0.226
Each (In a Pack of 10)
Units
TO-220 30mm 25.4mm 12.7mm 30 x 25.4 x 12.7mm 14 (Natural) °C/W, 7.3 (Forced) °C/W Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-3938
BrandRS PRO
£120.53
1 Box of 2000
Box(es)
TO-220 19.1mm 13.2mm 9.5mm 19.1 x 13.2 x 9.5mm 28 (Natural) °C/W, 8 (Forced) °C/W - - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-4154
BrandRS PRO
£0.215
Each (In a Pack of 10)
Units
SMD 12.7mm 26.2mm 10.2mm 12.7 x 26.2 x 10.2mm 31 (Natural) °C/W, 5 (Forced) °C/W Surface Mount - Black - Tin Plated Copper - RSAW294
RS Stock No. 176-3942
BrandRS PRO
£0.69
Each (In a Box of 500)
Units
TO-3 46.4mm 46.4mm 33.3mm 46.4 x 46.4 x 33.3mm 2 (Forced) °C/W, 2 (Natural) °C/W - - Black - Black Anodized Aluminium TO-3 RSAW294
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