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. 750-0866
Mfr. Part No.BGA PP 015
SGD3.55
Each
units
- 100mm 49mm 49mm 10 x 49 x 49mm 10.5K/W Adhesive Foil - Natural - - - BGA -
New
RS Stock No. 265-254
Mfr. Part No.35F159L50
BrandLSI
SGD21.28
Each
units
- 159mm 50mm 35mm 159 x 50 x 35mm - - - - - - - - -
RS Stock No. 168-6289
Mfr. Part No.WA 470
BrandSeifert
SGD72.55
Each
units
Universal Rectangular Alu 1m 100mm 15mm - - - - Black - - - - -
RS Stock No. 789-8554
Mfr. Part No.205AB1000B
SGD13.03
Each
units
Universal Rectangular Alu 100mm 46mm 33mm 100 x 46 x 33mm 4.5°C/W Screw - Black - - - - -
RS Stock No. 184-6726
Mfr. Part No.HS-DC-1/8-LFL-20
BrandSPREADFAST
SGD5.06
Each
units
1/8 Brick DC/DC Converter 62mm 25mm 20mm 62 x 25 x 20mm - - - Black DC-DC Converters - Aluminium - HS
RS Stock No. 674-4725
Mfr. Part No.ICK PGA 11x11
SGD2.68
Each
units
Universal Square Alu 27.95mm 24.76mm 15.24mm 27.95 x 24.76 x 15.24mm 10.9K/W Adhesive Foil, Conductive Foil - Black - - - PGA -
RS Stock No. 698-8139
Mfr. Part No.FK 251 06 LF PAK
SGD1.30
Each (In a Pack of 5)
units
- 15mm 13mm 6.5mm 15 x 13 x 6.5mm 32K/W Solder - Silver - - - - -
RS Stock No. 504-0659
Mfr. Part No.ICKBGA23X23
SGD3.07
Each
units
Universal Square Alu 23mm 23mm 6mm 23 x 23 x 6mm 22.5 → 6.5K/W Conductive Adhesive, Conductive Foil - Black - - - BGA -
RS Stock No. 560-224
Mfr. Part No.HAF-15L
BrandTDK-Lambda
SGD28.37
Each
units
1/1 Brick AC/DC Converter, PFE 116.8mm 61mm 38.1mm 116.8 x 61 x 38.1mm 1.9K/W - - Black - - - - -
RS Stock No. 189-8139
Mfr. Part No.SK129-25,4-STS-220
SGD3.23
Each
units
- 25.4mm 42mm 25mm 25.4 x 42 x 25mm 6.5K/W Clip - Black - - - - -
RS Stock No. 712-4352
Mfr. Part No.0SA36/50/B
SGD11.95
Each
units
- 50mm 49.5mm 85.5mm 50 x 49.5 x 85.5mm 1.95K/W Clip - Black - - - - -
RS Stock No. 893-5617
Mfr. Part No.C40-058-VE
BrandOhmite
SGD7.24
Each
units
- 58mm 32mm 46.3mm 58 x 32 x 46.3mm - Clip - - - - Aluminium - C40
RS Stock No. 880-5752
Mfr. Part No.322605B00000G
SGD6,711.51
1 Pack of 3000
Pack(s)
- - - 6.35mm 19.05 x 6.35mm 54°C/W Vertical 19.05mm Black - Black Anodized - TO-5 3226
RS Stock No. 184-6717
Mfr. Part No.SFH2501-11L
BrandSPREADFAST
SGD5.97
Each
units
Universal Square Alu 25mm 25mm 11mm 25 x 25 x 11mm - - - Black Suitable for Use with a Wide Range of Semi-Conductor Devices with Flat Surfaces - Aluminium - SFH
RS Stock No. 402-973
Mfr. Part No.569003B00000G
SGD17.401
Each (In a Pack of 10)
units
- 46.48mm 46.48mm 33.27mm 46.48 x 46.48 x 33.27mm 5.5°C/W PCB Through Hole - Black - - - - -
RS Stock No. 2508344294
Mfr. Part No.825902B05300
SGD1.38
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509067939
Mfr. Part No.MAX03-HG
SGD0.50
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508958840
Mfr. Part No.NTE438
SGD1.10
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509067901
Mfr. Part No.MAX01-HG
SGD0.39
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509067670
Mfr. Part No.577002B04000G
SGD1.01
Each
units
- - - - - - - - - - - - - -
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