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. 722-6915
Mfr. Part No.SK 487/37,5 SA
$7.31
Each
units
TO-220, TO-247 37.5mm 52.3mm 28mm 37.5 x 52.3 x 28mm 5K/W Clip - Black - - - - -
RS Stock No. 169-4252
Mfr. Part No.SK92 150SA
$25.20
Each
units
Universal Rectangular Alu 150mm 100mm 40mm 150 x 100 x 40mm 1K/W - - Black - - - - -
RS Stock No. 674-4838
Mfr. Part No.ICK S 50x50x25
$12.92
Each
units
Universal Square Alu 50mm 50mm 25mm 50 x 50 x 25mm 2.4K/W Adhesive Foil, Conductive Foil - - - - - - -
RS Stock No. 189-8274
Mfr. Part No.SK92-100-SA
$18.30
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
$4.48
Each
units
- 32mm 20mm 50mm 50 x 32 x 20mm 6K/W Screw - Black - Black Anodized - TO-220 -
RS Stock No. 674-4703
Mfr. Part No.SK452-37,5SA
$3.24
Each
units
- 37.5mm 29mm 25mm 37.5 x 29 x 25mm 11K/W - - Black - - - - -
RS Stock No. 692-0616
Mfr. Part No.LA 9 100 24 V
$169.92
Each
units
Universal Rectangular Alu with fan 100mm 80mm 83mm 100 x 80 x 83mm 0.22K/W - - - - - - - -
RS Stock No. 221-2160
Mfr. Part No.SK75-50-TO220
$4.19
Each
units
- 50mm 32mm 14mm 50 x 32 x 14mm 8.5K/W Screw - Black - - - TO-220 -
RS Stock No. 722-6861
Mfr. Part No.SK 575/37,5 SA
$4.98
Each
units
- 37.5mm 6mm 50mm 37.5 x 6 x 50mm 8K/W Clip - Black - - - - -
RS Stock No. 189-8599
Mfr. Part No.SK42-100-SA
$29.29
Each
units
Universal Rectangular Alu 100mm 200mm 25mm 100 x 200 x 25mm 0.95K/W - - Black - - Aluminium - -
RS Stock No. 774-2798
Mfr. Part No.LAM 3 K 75 05
$104.62
Each
units
- 75mm 30mm 30mm 75 x 30 x 30mm 1.18K/W PCB Mount - Natural - - - - -
RS Stock No. 692-0663
Mfr. Part No.LA 6 100 12 V
$124.56
Each
units
Universal Rectangular Alu with fan 100mm 62mm 74mm 100 x 62 x 74mm 0.2K/W - - - - - - - -
RS Stock No. 221-2148
Mfr. Part No.SK0950TO220
$4.35
Each
units
- 50mm 29mm 11.5mm 50 x 29 x 11.5mm 9.5K/W Clip, Screw - - - - - TO-220 -
RS Stock No. 774-2821
Mfr. Part No.LAM 5 100 24
$130.48
Each
units
TO-218, TO-220, TO-247, TO-264 100mm 50mm 50mm 100 x 50 x 50mm 0.4K/W PCB Mount - Natural - - - - -
RS Stock No. 189-8268
Mfr. Part No.SK89-75-SA
$24.76
Each
units
- 75mm 80mm 78.6mm 75 x 80 x 78.6mm 1.3K/W - - Black - - - - -
RS Stock No. 674-4797
Mfr. Part No.ICK S 25x25x18,5
$8.15
Each
units
Universal Square Alu 25mm 25mm 18.5mm 25 x 25 x 18.5mm 5.2K/W Adhesive Foil, Conductive Foil - - - - - - -
RS Stock No. 189-8583
Mfr. Part No.SK13-35-SA-22
$2.12
Each
units
- 35mm 17mm 13mm 35 x 17 x 13mm 17K/W Clip, Screw - Black - - - TO-220 -
RS Stock No. 692-0672
Mfr. Part No.LA 7 100 12 V
$188.12
Each
units
- 100mm 125mm 74mm 100 x 125 x 74mm 0.12K/W - - - - - - - -
RS Stock No. 189-8397
Mfr. Part No.SK56-150-SA
$96.02
Each
units
Universal Rectangular Alu 150mm 300mm 40mm 150 x 300 x 40mm 0.35K/W - - Black - - - - -
RS Stock No. 722-6896
Mfr. Part No.SK 574/25 SA
$3.76
Each
units
- 25mm 32.3mm 28mm 25 x 32.3 x 28mm 7.5K/W Clip - Black - - - - -