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 Priced to Clear
RS Stock No. 234-2334
Mfr. Part No.LS220
£1.80
Each
Units
- 30.2mm 30mm 13mm 30.2 x 30 x 13mm 17°C/W Clip, Screw - Black - - - TO-218, TO-220 -
RS Stock No. 271-864
Mfr. Part No.345AB1000B
£12.76
Each
Units
Universal Rectangular Alu 100mm 120mm 37mm 100 x 120 x 37mm 1K/W - - Black - - - - -
RS Stock No. 750-0888
Mfr. Part No.BGA STD 010
£5.07
1 Bag of 5
Bag(s)
- 13mm 13.5mm 10mm 13 x 13.5 x 10mm 27K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 234-2485
Mfr. Part No.510AB0500MB
£4.04
Each
Units
Universal Rectangular Alu 50mm 65mm 20mm 50 x 65 x 20mm 3.3K/W - - Black - - - - -
RS Stock No. 234-2491
Mfr. Part No.510AB1000MB
£3.59
Each
Units
Universal Rectangular Alu 100mm 65mm 20mm 100 x 65 x 20mm 2.3K/W - - Black - - - - -
RS Stock No. 271-870
Mfr. Part No.350AB1500B
£25.18
Each
Units
Universal Rectangular Alu 150mm 125mm 50mm 150 x 125 x 50mm 0.5K/W - - Black - - - - -
RS Stock No. 903-3080
Mfr. Part No.109AB1500B
£9.86
Each
Units
Universal Rectangular Alu 150mm 100mm 15mm 150 x 100 x 15mm 0.6°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 903-3107
Mfr. Part No.177AB2000B
£78.43
Each
Units
Universal Rectangular Alu 200mm 300mm 83mm 200 x 300 x 83mm 0.07°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 903-3166
Mfr. Part No.153AB1000B
£9.05
Each
Units
Universal Rectangular Alu 100mm 66mm 40mm 100 x 66 x 40mm 0.69°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 903-3087
Mfr. Part No.109AB1000B
£7.63
Each
Units
Universal Square Alu 100mm 100mm 15mm 100 x 100 x 15mm 0.83°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 234-2514
Mfr. Part No.515AB1000MB
£4.83
Each
Units
Universal Rectangular Alu 100mm 88mm 25mm 100 x 88 x 25mm 1.5K/W - - Black - - - - -
RS Stock No. 400-056
Mfr. Part No.193AB1500B
£39.85
Each
Units
Universal Rectangular Alu 150mm 240mm 46mm 150 x 240 x 46mm 0.4K/W - - Black - - - - -
RS Stock No. 750-0908
Mfr. Part No.BGA STD 050
£6.08
1 Bag of 5
Bag(s)
- 20mm 20mm 19.1mm 20 x 20 x 19.1mm 14K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 750-0951
Mfr. Part No.BGA STD 115
£1.57
Each
Units
- 40mm 40mm 18mm 40 x 40 x 18mm 8.2K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 789-8567
Mfr. Part No.520AB1250MB
£10.00
Each
Units
Universal Rectangular Alu 125mm 88mm 35mm 125 x 88 x 35mm 1.25°C/W - - Black - - - - -
RS Stock No. 234-2390
Mfr. Part No.PPC0200BP
£1.54
Each
Units
- 20mm 27mm 16mm 20 x 27 x 16mm 11K/W Clip - Black - - - TO-220 -
RS Stock No. 903-3084
Mfr. Part No.109AB2000B
£12.33
Each
Units
Universal Rectangular Alu 200mm 100mm 15mm 200 x 100 x 15mm 0.48°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 903-3090
Mfr. Part No.122AB2000B
£22.21
Each
Units
Universal Square Alu 200mm 200mm 15mm 200 x 200 x 15mm 0.23°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 903-3096
Mfr. Part No.122AB1500B
£17.76
Each
Units
Universal Rectangular Alu 150mm 200mm 15mm 150 x 200 x 15mm 0.29°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 903-3163
Mfr. Part No.153AB2000B
£15.55
Each
Units
Universal Rectangular Alu 200mm 66mm 40mm 200 x 66 x 40mm 0.4°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -