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. 467-567
Mfr. Part No.EBA19031-10CL+T710
BrandMalico
HK$40.87
Each
units
Clip 19mm 19mm 10mm 19 x 19 x 10mm 5.2K/W Clip - Black - - - - -
RS Stock No. 184-6715
Mfr. Part No.SFH1901-10L
BrandSPREADFAST
HK$28.39
Each
units
Universal Square Alu 19mm 19mm 10mm 19 x 19 x 10mm - - - Black Suitable for Use with a Wide Range of Semi-Conductor Devices with Flat Surfaces - Aluminium - SFH
RS Stock No. 712-4245
Mfr. Part No.ML73/25WPINS
HK$6.612
Each (In a Pack of 5)
units
- 12.8mm 35mm 25.4mm 12.8 x 35 mm x 25.4mm 13.4K/W Solder - Black - - - TO-220 -
RS Stock No. 920-9439
Mfr. Part No.ILA-HSINK-RADL-70X20MM-BLK
HK$126.18
Each
units
SCOB - - 20mm - - - 70mm - - - - LED -
RS Stock No. 189-8432
Mfr. Part No.SK58-50-SA
HK$62.54
Each
units
Universal Rectangular Alu 50mm 150mm 27mm 50 x 150 x 27mm 1.7K/W - - Black - - Aluminium - -
RS Stock No. 867-0903
Mfr. Part No.SF-03-200-S
BrandSPREADFAST
HK$64.04
Each
units
Heat Pipe 200mm - - 3 x 200mm - - 3mm - - - Copper - SF
RS Stock No. 920-9436
Mfr. Part No.ILA-HSINK-RADL-55X20MM-BLK
HK$130.71
Each
units
SCOB - - 20mm - - - 55mm - - - - LED -
RS Stock No. 867-0900
Mfr. Part No.SF-03-150-S
BrandSPREADFAST
HK$63.31
Each
units
Heat Pipe 150mm - - 3 x 150mm - - 3mm - - - Copper - SF
RS Stock No. 920-9433
Mfr. Part No.ILA-HSINK-RADL-70X70MM-BLK
HK$220.96
Each
units
SCOB - - 70mm - - - 70mm - - - - LED -
RS Stock No. 2509067585
Mfr. Part No.569022B00000G
HK$29.54
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509067670
Mfr. Part No.577002B04000G
HK$6.44
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509067939
Mfr. Part No.MAX03-HG
HK$3.47
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509005048
Mfr. Part No.577102B04000G
HK$4.06
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2552564746
Mfr. Part No.SSR-HS-1 (1)
HK$595.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509067901
Mfr. Part No.MAX01-HG
HK$2.73
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508344294
Mfr. Part No.825902B05300
HK$8.82
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508958834
Mfr. Part No.NTE422
HK$21.14
1 Pack of 2
Pack(s)
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