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. 189-8640
Mfr. Part No.SK44-150-SA
MYR45.76
Each
units
- 150mm 159mm 15mm 150 x 159 x 15mm 1.4K/W Clamp - Black - - - - -
RS Stock No. 189-8482
Mfr. Part No.SK68-100-SA
MYR24.19
Each
units
TO-220 100mm 46mm 33mm 100 x 46 x 33mm 3K/W Screw - Black - - - - -
RS Stock No. 903-3084
Mfr. Part No.109AB2000B
MYR72.89
Each
units
- 200mm 100mm 15mm 200 x 100 x 15mm 0.48°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - 100
RS Stock No. 712-4302
Mfr. Part No.577202B00000G
MYR1.26
Each (In a Pack of 5)
units
Dual TO-220 19.05mm 13.21mm 12.7mm 19.05 x 13.21 x 12.7mm 24.4°C/W - - Black - Black Anodized - - -
RS Stock No. 712-4207
Mfr. Part No.579302B00000G
MYR2.022
Each (In a Pack of 5)
units
TO-220 19.05mm 24.89mm 11.18mm 19.05 x 24.89 x 11.18mm 16.8°C/W PCB Through Hole - Black - - - - -
RS Stock No. 692-5081
Mfr. Part No.165AB2500B
MYR749.95
Each
units
- 250mm 300mm 40mm 250 x 300 x 40mm 0.3K/W - - Black - - - - -
RS Stock No. 674-4769
Mfr. Part No.ICK BGA 40x40x10
MYR8.39
Each
units
BGA 40mm 40mm 10mm 40 x 40 x 10mm 13.8K/W Adhesive Foil, Conductive Foil - Black - - - - -
RS Stock No. 903-3166
Mfr. Part No.153AB1000B
MYR41.38
Each
units
- 100mm 66mm 40mm 100 x 66 x 40mm 0.69°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - 100
RS Stock No. 789-8554
Mfr. Part No.205AB1000B
MYR31.70
Each
units
- 100mm 46mm 33mm 100 x 46 x 33mm 4.5°C/W Screw - Black - - - - -
RS Stock No. 722-6915
Mfr. Part No.SK 487/37,5 SA
MYR13.60
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. 658-031
Mfr. Part No.188AB2500B
MYR149.99
Each
units
- 250mm 150mm 40mm 250 x 150 x 40mm 0.63K/W - - Black - - - - -
RS Stock No. 903-3153
Mfr. Part No.113AB1500B
MYR78.08
Each
units
- 150mm 150mm 25mm 150 x 150 x 25mm 0.39°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - 100
RS Stock No. 698-8123
Mfr. Part No.FK 250 06 LF PAK
MYR4.30
Each (In a Pack of 5)
units
SOT-669 15mm 8mm 6.5mm 15 x 8 x 6.5mm 37K/W Solder - Silver - - - - -
RS Stock No. 674-4756
Mfr. Part No.ICK BGA 14x14x10
MYR5.58
Each
units
BGA 14mm 14mm 10mm 14 x 14 x 10mm 27.4K/W Adhesive Foil, Conductive Foil - Black - - - - -
RS Stock No. 903-3147
Mfr. Part No.180AB1500B
MYR418.57
Each
units
- 150mm 215mm 77mm 150 x 215 x 77mm 0.1°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - 100
RS Stock No. 189-8527
Mfr. Part No.SK68-75-SA
MYR20.39
Each
units
TO-220 75mm 46mm 33mm 75 x 46 x 33mm 3.9K/W Screw - Black - - - - -
RS Stock No. 189-9097
Mfr. Part No.FK237SA220O
MYR6.20
Each
units
TO-220 19.05mm 14.5mm 12.7mm 19.05 x 14.5 x 12.7mm 21K/W Clip - Black - - - - -
RS Stock No. 271-858
Mfr. Part No.345AB0750B
MYR37.91
Each
units
- 75mm 120mm 37mm 75 x 120 x 37mm 1.2K/W - - Black - - - - -
RS Stock No. 789-8567
Mfr. Part No.520AB1250MB
MYR48.00
Each
units
- 125mm 88mm 35mm 125 x 88 x 35mm 1.25°C/W - - Black - - - - -
RS Stock No. 403-162
Mfr. Part No.437856
MYR8.41
Each (In a Pack of 10)
units
TO-218, TO-220, TO-247 34.5mm 12.5mm 25mm 12.5 x 34.5 x 25mm 11.4K/W Solder - Black - - - - -
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