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. 169-4252
Mfr. Part No.SK92 150SA
£11.94
Each
Units
Universal Rectangular Alu 150mm 100mm 40mm 150 x 100 x 40mm 1K/W - - Black - - - - -
RS Stock No. 674-4756
Mfr. Part No.ICK BGA 14x14x10
£1.28
Each
Units
Universal Square Alu 14mm 14mm 10mm 14 x 14 x 10mm 27.4K/W Adhesive Foil, Conductive Foil - Black - - - BGA -
RS Stock No. 774-2782
Mfr. Part No.LAM 3 K 50 12
£33.92
Each
Units
- 50mm 30mm 30mm 50 x 30 x 30mm 1.3K/W PCB Mount - Natural - - - - -
RS Stock No. 722-6915
Mfr. Part No.SK 487/37,5 SA
£2.67
Each
Units
- 37.5mm 52.3mm 28mm 37.5 x 52.3 x 28mm 5K/W Clip - Black - - - - -
RS Stock No. 189-8599
Mfr. Part No.SK42-100-SA
£14.05
Each
Units
Universal Rectangular Alu 100mm 200mm 25mm 100 x 200 x 25mm 0.95K/W - - Black - - Aluminium - -
RS Stock No. 774-2821
Mfr. Part No.LAM 5 100 24
£48.79
Each
Units
Universal Rectangular Alu with fan 100mm 50mm 50mm 100 x 50 x 50mm 0.4K/W PCB Mount - Natural - - - - -
RS Stock No. 189-8094
Mfr. Part No.SK104-25,4-STS-22
£1.58
Each
Units
- 25.4mm 34.9mm 12.7mm 25.4 x 34.9 x 12.7mm 14K/W Clip - Black - - - TO-220 -
RS Stock No. 189-8612
Mfr. Part No.SK42-200-SA
£20.26
Each
Units
Universal Rectangular Alu 200mm 200mm 25mm 200 x 200 x 25mm 1.65 → 0.7K/W - - Black - - Aluminium - -
RS Stock No. 189-8274
Mfr. Part No.SK92-100-SA
£9.80
Each
Units
Universal Square Alu 100mm 100mm 40mm 100 x 100 x 40mm 1K/W - - Black - - - - -
RS Stock No. 221-2182
Mfr. Part No.SK76-50-TO220
£1.54
Each
Units
- 32mm 20mm 50mm 50 x 32 x 20mm 6K/W Screw - Black - Black Anodized - TO-220 -
RS Stock No. 189-8606
Mfr. Part No.SK42-150-SA
£14.18
Each
Units
Universal Rectangular Alu 150mm 200mm 25mm 150 x 200 x 25mm 0.7K/W - - Black - - Aluminium - -
RS Stock No. 189-8404
Mfr. Part No.SK56-200-SA
£67.11
Each
Units
Universal Rectangular Alu 200mm 300mm 40mm 200 x 300 x 40mm 0.3K/W - - Black - - - - -
RS Stock No. 189-8628
Mfr. Part No.SK42-75-SA
£10.09
Each
Units
Universal Rectangular Alu 75mm 200mm 25mm 75 x 200 x 25mm 1.4K/W - - Black - - Aluminium - -
RS Stock No. 255-8523
Mfr. Part No.SK434/50SA
£3.74
Each
Units
- 50mm 50mm 40mm 50 x 50 x 40mm 3.1K/W - - Black - - - - -
RS Stock No. 189-8713
Mfr. Part No.SK53-100-SA
£10.49
Each
Units
- 100mm 180mm 48mm 100 x 180 x 48mm 0.6K/W - - Black - - - - -
RS Stock No. 722-6903
Mfr. Part No.SK 574/84 SA
£3.36
Each
Units
- 84mm 32.3mm 28mm 84 x 32.3 x 28mm 4K/W Clip - Black - - - - -
RS Stock No. 189-8432
Mfr. Part No.SK58-50-SA
£4.88
Each
Units
Universal Rectangular Alu 50mm 150mm 27mm 50 x 150 x 27mm 1.7K/W - - Black - - - - -
RS Stock No. 698-8117
Mfr. Part No.FK 244 13 D PAK
£0.73
Each (In a Pack of 5)
Units
- 23mm 13mm 10mm 23 x 13 x 10mm 25K/W Solder - Silver - - - - -
RS Stock No. 698-8111
Mfr. Part No.FK 244 13 D2 PAK
£0.934
Each (In a Pack of 5)
Units
- 26mm 13mm 10mm 26 x 13 x 10mm 22.8K/W Solder - Silver - - - - -
RS Stock No. 189-8533
Mfr. Part No.SK85-100-SA
£20.10
Each
Units
Universal Rectangular Alu 100mm 160mm 40mm 100 x 160 x 40mm 0.9K/W - - Black - - - - -