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. 490-7040
Mfr. Part No.EK/B/300
$231.22
Each
units
Universal Square Alu 300mm 300mm 40mm 300 x 300 x 40mm 0.3K/W - - Black - - Aluminium - -
RS Stock No. 507-4753
Mfr. Part No.002504
$1.05
Each (In a Pack of 5)
units
- 13.21mm 19.05mm 9.52mm 13.21 x 19.05 x 9.52mm 25.9°C/W - - Black - Black Anodized - TO-220 -
RS Stock No. 189-8476
Mfr. Part No.SK64-75-SA-2M3
$14.83
Each
units
- 75mm 70mm 25mm 75 x 70 x 25mm 2.7K/W Screw - Black - - - - -
RS Stock No. 221-2160
Mfr. Part No.SK75-50-TO220
$4.36
Each
units
- 50mm 32mm 14mm 50 x 32 x 14mm 8.5K/W Screw - Black - - - TO-220 -
RS Stock No. 189-8280
Mfr. Part No.SK92-50-SA
$20.97
Each
units
Universal Rectangular Alu 50mm 100mm 40mm 50 x 100 x 40mm 1.75K/W - - Black - - Aluminium - -
RS Stock No. 674-4756
Mfr. Part No.ICK BGA 14x14x10
$3.20
Each
units
BGA 14mm 14mm 10mm 14 x 14 x 10mm 27.4K/W Adhesive Foil, Conductive Foil - Black - - Aluminium BGA -
RS Stock No. 674-4721
Mfr. Part No.SK508-100SA
$28.21
Each
units
Universal Square Alu 100mm 100mm 25mm 100 x 100 x 25mm 2K/W - - Black - - Aluminium - -
RS Stock No. 259-8739
Mfr. Part No.SK89-75KLSSR1
$46.64
Each
units
- 75mm 80mm 78.6mm 75 x 80 x 78.6mm 1.3K/W DIN Rail - Black - Anodized Stainless Steel - -
RS Stock No. 189-8628
Mfr. Part No.SK42-75-SA
$22.81
Each
units
Universal Rectangular Alu 75mm 200mm 25mm 75 x 200 x 25mm 1.4K/W - - Black - - Aluminium - -
RS Stock No. 698-8105
Mfr. Part No.FK 244 08 D2 PAK
$2.736
Each (In a Pack of 5)
units
- 26mm 8mm 10mm 26 x 8 x 10mm 29.3K/W Solder - Silver - - - - -
RS Stock No. 774-2821
Mfr. Part No.LAM 5 100 24
$123.79
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 - -
RS Stock No. 234-2463
Mfr. Part No.159AB2000B
$102.33
Each
units
Universal Rectangular Alu 200mm 160mm 40mm 200 x 160 x 40mm 0.55K/W - - Black - - Aluminium - -
RS Stock No. 903-3107
Mfr. Part No.177AB2000B
$207.01
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 - 100
RS Stock No. 189-8094
Mfr. Part No.SK104-25,4-STS-22
$4.60
Each
units
TO-220 25.4mm 34.9mm 12.7mm 25.4 x 34.9 x 12.7mm 14K/W Clip - Black - - - TO-220 -
RS Stock No. 191-0374
Mfr. Part No.UK14-25-SA-220
$2.00
Each
units
- 25mm 14mm 15mm 25 x 14 x 15mm 20K/W Clip, Screw - Black - - - TO-220 -
RS Stock No. 674-4835
Mfr. Part No.ICK S 40x40x20
$19.11
Each
units
Universal Square Alu 40mm 40mm 20mm 40 x 40 x 20mm 3.5K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 722-6928
Mfr. Part No.SK 487/84 SA
$11.43
Each
units
- 84mm 52.3mm 28mm 84 x 52.3 x 28mm 2.5K/W Clip - Black - - - - -
RS Stock No. 507-4999
Mfr. Part No.MA/B/100
$36.98
Each
units
Universal Rectangular Alu 100mm 97mm 25mm 100 x 97 x 25mm 1.9K/W - - Black - - Aluminium - -
RS Stock No. 268-105
Mfr. Part No.400020
$2.228
Each (In a Pack of 5)
units
- 19mm 22mm 19mm 11 x 22 x 19mm 23°C/W PCB Through Hole - - - - - TO-220 -
RS Stock No. 674-4740
Mfr. Part No.ICK PGA 6x6x14
$3.57
Each
units
Universal Square Alu 14mm 14mm 14mm 14 x 14 x 14mm 18.6K/W Adhesive Foil, Conductive Foil - Black - - Aluminium PGA -