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. 712-4333
Mfr. Part No.573400D00010G
SGD14.46
Each (In a Pack of 5)
units
- 12.7mm 30.99mm 10.16mm 12.7 x 30.99 x 10.16mm 14°C/W PCB Surface Mount - - - - - - -
RS Stock No. 218-2261
Mfr. Part No.KL224-50.8SW
BrandSchaffner
SGD40.49
Each
units
- 50.8mm 29mm 12mm 50.8 x 29 x 12mm 7.5K/W Clip - Black - - - - -
RS Stock No. 184-6721
Mfr. Part No.SFH3501-16L
BrandSPREADFAST
SGD7.01
Each
units
Universal Square Alu 35mm 35mm 16mm 35 x 35 x 16mm - - - Black Suitable for Use with a Wide Range of Semi-Conductor Devices with Flat Surfaces - Aluminium - SFH
RS Stock No. 674-4740
Mfr. Part No.ICK PGA 6x6x14
SGD10.36
Each
units
Universal Square Alu 14mm 14mm 14mm 14 x 14 x 14mm 18.6K/W Adhesive Foil, Conductive Foil - Black - - - PGA -
RS Stock No. 189-8690
Mfr. Part No.SK47-150-SA
SGD9.17
Each
units
Universal Rectangular Alu 150mm 200mm 40mm 150 x 200 x 40mm 0.53K/W - - Black - - - - -
RS Stock No. 234-2485
Mfr. Part No.510AB0500MB
SGD17.45
Each
units
Universal Rectangular Alu 50mm 65mm 20mm 50 x 65 x 20mm 3.3K/W - - Black - - - - -
RS Stock No. 877-6960
Mfr. Part No.ILK-LINEXT-1099-001.
SGD165.53
Each
units
- 1.099m 40mm 24.6mm - - - - - - - - LED Array -
RS Stock No. 681-1544
Mfr. Part No.HAM-F10T
BrandTDK-Lambda
SGD72.41
Each
units
1/1 Brick AC/DC Converter, PFE 100mm 160mm 33.4mm 100 x 160 x 33.4mm 0.78K/W Screw - - - - - - -
RS Stock No. 403-190
Mfr. Part No.SW63-4
SGD2.477
Each (In a Pack of 10)
units
- 12.5mm 34.5mm 63mm 12.5 x 34.5 x 63mm 7K/W Solder - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 712-4217
Mfr. Part No.573300D00010G
SGD1.22
Each (In a Pack of 5)
units
- 12.7mm 26.16mm 10.16mm 12.7 x 26.16 x 10.16mm 18°C/W PCB Surface Mount - - - - - - -
RS Stock No. 880-5787
Mfr. Part No.531102V02500G
SGD19,111.73
1 Pack of 10500
Pack(s)
- 12.7mm 34.92mm 38.1mm 34.92 x 12.7 x 38.1mm 10.4°C/W - - Black Through Hole Discrete Semiconductors - Aluminium TO-202, TO-220 3531
RS Stock No. 168-8055
Mfr. Part No.WA203B
BrandSchaffner
SGD40.21
Each
units
Universal Rectangular Alu 1m 32mm 20mm 1000 x 32 x 20mm - - - Silver - - - - -
RS Stock No. 712-4406
Mfr. Part No.0S565/100/B
SGD8.28
Each
units
- 100mm 15mm 54mm 100 x 15 x 54mm 4.63K/W Clip - Black - - - - -
RS Stock No. 674-4721
Mfr. Part No.SK508-100SA
SGD15.94
Each
units
Universal Square Alu 100mm 100mm 25mm 100 x 100 x 25mm 2K/W - - Black - - - - -
RS Stock No. 712-4150
Mfr. Part No.241404B91200G
SGD11.72
Each
units
1/4 Brick DC/DC Converter 58mm 58mm 11.4mm 37 x 58 x 11.4mm - Screw - - - - - - -
RS Stock No. 189-8072
Mfr. Part No.SK100-50-SA
SGD11.32
Each
units
Universal Rectangular Alu 50mm 66mm 40mm 50 x 66 x 40mm 2.5K/W - - Black - - - - -
RS Stock No. 750-0904
Mfr. Part No.BGA STD 045
SGD10.61
1 Bag of 5
Bag(s)
- 23mm 23mm 18mm 23 x 23 x 18mm 14.7K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 893-4948
Mfr. Part No.FA-T220-51E
BrandOhmite
SGD2.461
Each (In a Pack of 10)
units
TBH25, TCH35, TEH100, TEH70 41.6mm 25mm 50.8mm 41.6 x 25 x 50.8mm 3.4°C/W Vertical - Black - Black Anodized Aluminium TO-218, TO-220, TO-247 F
RS Stock No. 692-0672
Mfr. Part No.LA 7 100 12 V
SGD182.48
Each
units
- 100mm 125mm 74mm 100 x 125 x 74mm 0.12K/W - - - - - - - -
RS Stock No. 400-012
Mfr. Part No.190AB1500B
SGD29.43
Each
units
Universal Rectangular Alu 150mm 175mm 30mm 150 x 175 x 30mm 1.6K/W - - Black - - - - -
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