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. 360-8809
Mfr. Part No.KL 112.25.A SW
BrandSchaffner
TWD84.00
Each
units
- 25mm 11mm 16mm 25 x 11 x 16mm 18K/W Screw - Black - - - TO-220 -
RS Stock No. 189-9104
Mfr. Part No.FK237SA220V
TWD74.00
Each
units
- 19.05mm 14.5mm 12.7mm 19.05 x 14.5 x 12.7mm 21K/W Clip - Black - - - TO-220 -
RS Stock No. 507-4753
Mfr. Part No.002504
TWD10.20
Each (In a Pack of 5)
units
- 13.21mm 19.05mm 9.52mm 13.21 x 19.05 x 9.52mm 25.9°C/W - - Black - Black Anodized - TO-220 -
RS Stock No. 698-8111
Mfr. Part No.FK 244 13 D2 PAK
TWD44.80
Each (In a Pack of 5)
units
- 26mm 13mm 10mm 26 x 13 x 10mm 22.8K/W Solder - Silver - - - - -
RS Stock No. 221-2160
Mfr. Part No.SK75-50-TO220
TWD119.00
Each
units
- 50mm 32mm 14mm 50 x 32 x 14mm 8.5K/W Screw - Black - - - TO-220 -
RS Stock No. 750-0904
Mfr. Part No.BGA STD 045
TWD308.00
1 Bag of 5
Bag(s)
- 23mm 23mm 18mm 23 x 23 x 18mm 14.7K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 674-4822
Mfr. Part No.ICK S 36x36x20
TWD370.00
Each
units
Universal Square Alu 36.4mm 36.4mm 20mm 36.4 x 36.4 x 20mm 3.2K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 189-8066
Mfr. Part No.SK100-37-5-SA
TWD189.00
Each
units
Universal Rectangular Alu 37.5mm 66mm 40mm 37.5 x 66 x 40mm 2.7K/W - - Black - - Aluminium - -
RS Stock No. 698-8105
Mfr. Part No.FK 244 08 D2 PAK
TWD29.00
Each (In a Pack of 5)
units
- 26mm 8mm 10mm 26 x 8 x 10mm 29.3K/W Solder - Silver - - - - -
RS Stock No. 218-2261
Mfr. Part No.KL224-50.8SW
BrandSchaffner
TWD125.00
Each
units
- 50.8mm 29mm 12mm 50.8 x 29 x 12mm 7.5K/W Clip - Black - - - - -
RS Stock No. 168-6346
Mfr. Part No.WA 203
BrandSeifert
TWD1,286.00
Each
units
Universal Rectangular Alu 1m 32mm 20mm 1000 x 32 x 20mm - - - Black - - Aluminium - -
RS Stock No. 264-686
Mfr. Part No.125AB2500B
TWD1,554.00
Each
units
Universal Rectangular Alu 250mm 200mm 25mm 250 x 200 x 25mm 0.58K/W - - Black - - Aluminium - -
RS Stock No. 674-4813
Mfr. Part No.ICK S 32x32x20
TWD191.00
Each
units
Universal Square Alu 32.7mm 32.7mm 20mm 32.7 x 32.7 x 20mm 3.7K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 360-8821
Mfr. Part No.KL 112.25.C SW
BrandSchaffner
TWD68.00
Each
units
- 25mm 11mm 16mm 25 x 11 x 16mm 18K/W Screw - Black - - - TO-220 -
RS Stock No. 674-4703
Mfr. Part No.SK452-37,5SA
TWD74.00
Each
units
- 37.5mm 29mm 25mm 37.5 x 29 x 25mm 11K/W - - Black - - - - -
RS Stock No. 912-5004
Mfr. Part No.ILA-HSNK-190x90x50mm-BLK
TWD1,912.00
Each
units
- 190mm 90mm 50mm 190 x 90 x 50mm - - - - - - - LED Array -
RS Stock No. 674-4765
Mfr. Part No.ICK BGA 35x35x10
TWD89.00
Each
units
Universal Square Alu 35mm 35mm 10mm 35 x 35 x 10mm 15.7K/W Adhesive Foil, Conductive Foil - Black - - Aluminium BGA -
RS Stock No. 221-2176
Mfr. Part No.SK76-37,5-TO220
TWD79.00
Each
units
- 37.5mm 32mm 20mm 37.5 x 32 x 20mm 8K/W Screw - Black - - - TO-220 -
RS Stock No. 218-2211
Mfr. Part No.KL205-38.1SW
BrandSchaffner
TWD110.00
Each
units
- 38.1mm 32mm 14mm 38.1 x 32 x 14mm 9K/W Clip - Black - - - - -
RS Stock No. 674-4797
Mfr. Part No.ICK S 25x25x18,5
TWD321.00
Each
units
Universal Square Alu 25mm 25mm 18.5mm 25 x 25 x 18.5mm 5.2K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -