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. 123-5617
Mfr. Part No.SF-CHS-202006P
BrandSPREADFAST
$1.622
Each (In a Pack of 5)
units
Universal Square Ceramic 12.35mm 12.35mm 10mm 20 x 20 x 6mm 18.5 °C/W @ 400 lfm, 37.8 °C/W @ 100 lfm Adhesive, Screw - White Chipset, Cooling, IC Cooling, LED, Metal Heat Sink Replacement, Power Modules - - - Ceramic Heat Spreader Pin Fin
RS Stock No. 189-8268
Mfr. Part No.SK89-75-SA
$24.08
Each
units
- 75mm 80mm 78.6mm 75 x 80 x 78.6mm 1.3K/W - - Black - - - - -
RS Stock No. 490-7056
Mfr. Part No.EM/B/250
$144.17
Each
units
Universal Rectangular Alu 250mm 200mm 40mm 250 x 200 x 40mm 0.33K/W - - Black - - Aluminium - -
RS Stock No. 692-0641
Mfr. Part No.LA 9 200 24 V
$299.05
Each
units
Universal Rectangular Alu with fan 200mm 80mm 83mm 200 x 80 x 83mm 0.15K/W - - - - - Aluminium - -
RS Stock No. 492-137
Mfr. Part No.00C855902B
$6.92
Each
units
Universal Square Alu 60.1mm 53mm 35.1mm 60.1 x 53 x 35.1mm 6.5K/W Solder - - - - Aluminium BGA -
RS Stock No. 485-8875
Mfr. Part No.PF720
$0.789
Each (In a Pack of 10)
units
- 19.84mm 8.1mm 20mm 19.84 x 8.1 x 20mm 28.9°C/W PCB Through Hole - - - - - TO-220 -
RS Stock No. 264-686
Mfr. Part No.125AB2500B
$73.04
Each
units
Universal Rectangular Alu 250mm 200mm 25mm 250 x 200 x 25mm 0.58K/W - - Black - - Aluminium - -
RS Stock No. 920-9427
Mfr. Part No.ILA-HSINK-RADL-120X150MM-BLK
$105.74
Each
units
SCOB - - 150mm 120 (Dia.) x 150mm - - 120mm - - - - LED -
RS Stock No. 158-540
Mfr. Part No.TDEX3132/100/FMF12G
$103.72
Each
units
Universal Rectangular Alu 100mm 101.6mm 77mm 100 x 101.6 x 77mm 0.16K/W - - Black - - Aluminium - -
RS Stock No. 189-8612
Mfr. Part No.SK42-200-SA
$52.46
Each
units
Universal Rectangular Alu 200mm 200mm 25mm 200 x 200 x 25mm 1.65 → 0.7K/W - - Black - - Aluminium - -
RS Stock No. 169-9803
Mfr. Part No.WA201 5
BrandSeifert
$29.44
Each
units
- 75mm 100mm 28mm 75 x 100 x 28mm 2.5K/W - - Black - - - - -
RS Stock No. 780-5953
Mfr. Part No.ILA-HSINK-70X70X55MM-BLK-K
$46.34
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. 271-858
Mfr. Part No.345AB0750B
$22.66
Each
units
Universal Rectangular Alu 75mm 120mm 37mm 75 x 120 x 37mm 1.2K/W - - Black - - Aluminium - -
RS Stock No. 158-534
Mfr. Part No.TDX3358/200FMF12G
$289.15
Each
units
Universal Rectangular Alu with fan 200mm 135mm 98mm 200 x 135 x 98mm 0.06K/W - - Clear - - Aluminium - -
RS Stock No. 722-6892
Mfr. Part No.SK 481/84 SA
$10.03
Each
units
- 84mm 30mm 45mm 84 x 30 x 45mm 3K/W Clip - Black - - - - -
RS Stock No. 189-8763
Mfr. Part No.SK02-100-SA
$21.51
Each
units
- 100mm 115mm 63mm 100 x 115 x 63mm 1.3K/W Screw - Black - - - - -
RS Stock No. 674-4781
Mfr. Part No.ICK S 10x10x12,5
$8.91
Each
units
Universal Square Alu 10mm 10mm 12.5mm 10 x 10 x 12.5mm 26.3K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 467-523
Mfr. Part No.CMBA024949
BrandMalico
$17.21
Each
units
- 37.5mm 37.5mm 33mm 37.5 x 37.5 x 33mm 2.5K/W Screw - Black - - - BGA -
RS Stock No. 674-4784
Mfr. Part No.ICK S 10x10x6,5
$9.21
Each
units
Universal Square Alu 10mm 10mm 6.5mm 10 x 10 x 6.5mm 29.9K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 489-6142
Mfr. Part No.MBH40002-25P/2.6
BrandMalico
$15.91
Each
units
Clip 40mm 40mm 25mm 40 x 40 x 25mm - Clip - Black - - - - -