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. 176-4179
BrandRS PRO
£3.54
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. 176-4194
BrandRS PRO
£2.53
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. 176-4172
BrandRS PRO
£0.52
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. 176-4151
BrandRS PRO
£3.00
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. 176-3941
BrandRS PRO
£0.241
Each (In a Box of 250)
Units
SMD 8mm 22.9mm 10.2mm 8 x 22.9 x 10.2mm 21 (Forced)°C/W Surface Mount - Black - Tin Plated Copper - RSAW294
RS Stock No. 176-4150
BrandRS PRO
£0.269
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. 176-4189
BrandRS PRO
£0.686
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. 176-4176
BrandRS PRO
£0.331
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. 169-4252
Mfr. Part No.SK92 150SA
£11.94
Each
Units
- 150mm 100mm 40mm 150 x 100 x 40mm 1K/W - - Black - - - - -
RS Stock No. 867-9039
Mfr. Part No.RPI-COOLINGKIT.9
£3.87
Each
Units
Raspberry Pi 1 & 2 - - - - - - - Black - - - - -
RS Stock No. 389-3451
Mfr. Part No.FHP08
£8.98
Each
Units
- 61.8mm 50mm 32mm 61.8 x 50 x 32mm - - - - - - - - -
RS Stock No. 674-4756
Mfr. Part No.ICK BGA 14x14x10
£1.28
Each
Units
BGA 14mm 14mm 10mm 14 x 14 x 10mm 27.4K/W Adhesive Foil, Conductive Foil - Black - - - - -
RS Stock No. 774-2782
Mfr. Part No.LAM 3 K 50 12
£27.75
Each
Units
TO-218, TO-220, TO-247, TO-264 50mm 30mm 30mm 50 x 30 x 30mm 1.3K/W PCB Mount - Natural - - - - -
RS Stock No. 722-6915
Mfr. Part No.SK 487/37,5 SA
£2.31
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. 158-562
Mfr. Part No.TDEX6015/TH
£8.52
Each
Units
- 60mm 60mm 16mm 60 x 60 x 16mm 2K/W - - Black - - - - -
RS Stock No. 158-556
Mfr. Part No.TDEX6015/TH12G
£24.43
Each
Units
- 60mm 60mm 47mm 60 x 60 x 47mm 0.5K/W - - Black - - - - -
RS Stock No. 402-995
Mfr. Part No.1.25GY-50
£1.339
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. 234-2334
Mfr. Part No.LS220
£1.80
Each
Units
TO-218, TO-220 30.2mm 30mm 13mm 30.2 x 30 x 13mm 17°C/W Clip, Screw - Black - - - - -
RS Stock No. 271-864
Mfr. Part No.345AB1000B
£12.76
Each
Units
- 100mm 120mm 37mm 100 x 120 x 37mm 1K/W - - Black - - - - -
RS Stock No. 712-4320
Mfr. Part No.575200B00000G
£0.548
Each (In a Pack of 5)
Units
TO-92 - 15.29mm 18.29mm - 60°C/W Plug-On Collar - Black - Black Anodized - - -
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