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. 864-4046
Mfr. Part No.WA614-002
BrandSchaffner
HK$11.586
Each (In a Pack of 5)
units
- 28mm 25mm 9.5mm 28 x 25 x 9.5mm - Vertical - - - Black Anodized - TO-220 WA614
RS Stock No. 658-025
Mfr. Part No.173AB2500B
HK$561.49
Each
units
Universal Rectangular Alu 250mm 119mm 63mm 250 x 119 x 63mm 0.5K/W - - Black - - Aluminium - -
RS Stock No. 903-3096
Mfr. Part No.122AB1500B
HK$257.33
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 - 100
RS Stock No. 467-523
Mfr. Part No.CMBA024949
BrandMalico
HK$98.02
Each
units
- 37.5mm 37.5mm 33mm 37.5 x 37.5 x 33mm 2.5K/W Screw - Black - - - BGA -
RS Stock No. 504-0716
Mfr. Part No.ICKSMDA10
HK$4.567
Each (In a Pack of 10)
units
Universal Rectangular Alu 10mm 6.3mm 4.8mm 10 x 6.3 x 4.8mm 75K/W Conductive Adhesive, Conductive Foil - Black - - Aluminium DIL-IC -
RS Stock No. 774-2770
Mfr. Part No.LAM 3 100 12
HK$522.71
Each
units
Universal Rectangular Alu with fan 100mm 30mm 30mm 100 x 30 x 30mm 1K/W PCB Mount - Natural - - Aluminium - -
RS Stock No. 189-8527
Mfr. Part No.SK68-75-SA
HK$53.31
Each
units
- 75mm 46mm 33mm 75 x 46 x 33mm 3.9K/W Screw - Black - - - TO-220 -
RS Stock No. 674-4835
Mfr. Part No.ICK S 40x40x20
HK$102.10
Each
units
Universal Square Alu 40mm 40mm 20mm 40 x 40 x 20mm 3.5K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 774-2815
Mfr. Part No.LAM 5 75 24
HK$638.23
Each
units
Universal Rectangular Alu with fan 75mm 50mm 50mm 75 x 50 x 50mm 0.5K/W PCB Mount - Natural - - Aluminium - -
RS Stock No. 189-8296
Mfr. Part No.SK92-75-SA
HK$98.58
Each
units
Universal Rectangular Alu 75mm 100mm 40mm 75 x 100 x 40mm 1.25K/W - - Black - - Aluminium - -
RS Stock No. 189-8713
Mfr. Part No.SK53-100-SA
HK$147.02
Each
units
- 100mm 180mm 48mm 100 x 180 x 48mm 0.6K/W - - Black - - - - -
RS Stock No. 692-0638
Mfr. Part No.LA 9 150 230 V
HK$1,548.08
Each
units
Universal Rectangular Alu with fan 150mm 80mm 83mm 150 x 80 x 83mm 0.25K/W - - - - - Aluminium - -
RS Stock No. 169-6933
Mfr. Part No.KL176 SW
BrandSeifert
HK$51.20
Each
units
- 40mm 27mm 19.1mm 40 x 27 x 19.1mm 12K/W PCB Surface Mount - Black - - - TO-3 -
RS Stock No. 903-3080
Mfr. Part No.109AB1500B
HK$142.85
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 - 100
RS Stock No. 189-9003
Mfr. Part No.ICK14/16B
HK$8.94
Each
units
Universal Rectangular Alu 6.3mm 19mm 4.8mm 6.3 x 19 x 4.8mm 50K/W - - Black - - Aluminium DIL-IC -
RS Stock No. 189-8246
Mfr. Part No.SK88-75-SA
HK$105.07
Each
units
- 75mm 100mm 50mm 75 x 100 x 50mm 1.1K/W - - Black - - - TO-3 -
RS Stock No. 880-1943
Mfr. Part No.ILA-EXTRUSION-01-0150.
HK$32.516
Each (In a Pack of 5)
units
Duris P5 150mm 24mm 18.9mm - - - - - - - - LED -
RS Stock No. 692-5081
Mfr. Part No.165AB2500B
HK$1,307.41
Each
units
Universal Rectangular Alu 250mm 300mm 40mm 250 x 300 x 40mm 0.3K/W - - Black - - Aluminium - -
RS Stock No. 912-5004
Mfr. Part No.ILA-HSNK-190x90x50mm-BLK
HK$543.04
Each
units
- 190mm 90mm 50mm 190 x 90 x 50mm - - - - - - - LED Array -
RS Stock No. 722-6805
Mfr. Part No.SK 577/20 SA
HK$41.51
Each
units
Universal Round Alu - - 20mm 50 (Dia.) x 20mm 2.4K/W Screw 50mm Black - - - LED -