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. 158-578
Mfr. Part No.TDEX3132/100
HK$253.56
Each
units
Universal Rectangular Alu 100mm 101.6mm 32mm 100 x 101.6 x 32mm 0.6K/W - - Black - - Aluminium - -
RS Stock No. 403-184
Mfr. Part No.437874
HK$11.60
Each (In a Pack of 10)
units
- 50mm 34.5mm 50mm 12.5 x 34.5 x 50mm 8.8K/W Solder - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 402-995
Mfr. Part No.436402
HK$19.509
Each (In a Pack of 10)
units
TO-220 32mm 32mm 16mm 60 x 32 x 16mm 6.8°C/W Screw - Black - - - TO-220 -
RS Stock No. 189-8274
Mfr. Part No.SK92-100-SA
HK$114.61
Each
units
Universal Square Alu 100mm 100mm 40mm 100 x 100 x 40mm 1K/W - - Black - - Aluminium - -
RS Stock No. 674-4740
Mfr. Part No.ICK PGA 6x6x14
HK$10.64
Each
units
Universal Square Alu 14mm 14mm 14mm 14 x 14 x 14mm 18.6K/W Adhesive Foil, Conductive Foil - Black - - Aluminium PGA -
RS Stock No. 234-2390
Mfr. Part No.PPC0200BP
HK$19.38
Each
units
- 20mm 27mm 16mm 20 x 27 x 16mm 11K/W Clip - Black - - - TO-220 -
RS Stock No. 189-8482
Mfr. Part No.SK68-100-SA
HK$70.69
Each
units
- 100mm 46mm 33mm 100 x 46 x 33mm 3K/W Screw - Black - - - TO-220 -
RS Stock No. 103-926
Mfr. Part No.374424B00035G
HK$50.81
Each
units
Universal Square Alu 27mm 27mm 18mm 27 x 27 x 18mm 20.3K/W Adhesive Foil - Black - - Aluminium BGA -
RS Stock No. 821-813
Mfr. Part No.2333B
HK$82.50
Each
units
Universal Square Alu 45.72mm 44.58mm 16.51mm 45.72 x 44.58 x 16.51mm 7.2K/W Clip - Black - - Aluminium BGA -
RS Stock No. 674-4793
Mfr. Part No.ICK S 14x14x10
HK$35.99
Each
units
Universal Square Alu 14mm 14mm 10mm 14 x 14 x 10mm 9.8K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 189-8599
Mfr. Part No.SK42-100-SA
HK$151.86
Each
units
Universal Rectangular Alu 100mm 200mm 25mm 100 x 200 x 25mm 0.95K/W - - Black - - Aluminium - -
RS Stock No. 774-2782
Mfr. Part No.LAM 3 K 50 12
HK$482.42
Each
units
- 50mm 30mm 30mm 50 x 30 x 30mm 1.3K/W PCB Mount - Natural - - - - -
RS Stock No. 189-8230
Mfr. Part No.SK88-50-SA
HK$72.19
Each
units
- 50mm 100mm 50mm 50 x 100 x 50mm 1.4K/W - - Black - - - TO-3 -
RS Stock No. 780-5953
Mfr. Part No.ILA-HSINK-70X70X55MM-BLK-K
HK$247.99
Each
units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 16, Oslon 4, Oslon 9, Stanley 1, Stanley 4 70mm 70mm 55mm 70 x 70 x 55mm - Screw - Black - - - LED -
RS Stock No. 780-5893
Mfr. Part No.ILA-HSINK-STAR-50X20MM-BLK-K
HK$129.83
Each
units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 4, Stanley 1, Stanley 4 - - 20mm 50 (Dia.) x 20mm - Screw 50mm Black - - - LED -
RS Stock No. 191-0374
Mfr. Part No.UK14-25-SA-220
HK$8.86
Each
units
- 25mm 14mm 15mm 25 x 14 x 15mm 20K/W Clip, Screw - Black - - - TO-220 -
RS Stock No. 722-6868
Mfr. Part No.SK 575/84 SA
HK$45.98
Each
units
- 84mm 6mm 50mm 84 x 6 x 50mm 5K/W Clip - Black - - - - -
RS Stock No. 722-6874
Mfr. Part No.SK 480/50 SA
HK$23.14
Each
units
- 50mm 28mm 10.3mm 50 x 28 x 10.3mm 10K/W Clip - Black - - - - -
RS Stock No. 774-2798
Mfr. Part No.LAM 3 K 75 05
HK$544.34
Each
units
- 75mm 30mm 30mm 75 x 30 x 30mm 1.18K/W PCB Mount - Natural - - - - -
RS Stock No. 774-2821
Mfr. Part No.LAM 5 100 24
HK$662.52
Each
units
TO-218, TO-220, TO-247, TO-264 100mm 50mm 50mm 100 x 50 x 50mm 0.4K/W PCB Mount - Natural - - Aluminium - -