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 doesnt 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. 893-5471
Mfr. Part No.DV-T263-201E
BrandOhmite
SGD2.41
Each (In a Pack of 100)
units
- 25.9mm 12.7mm 12.1mm 25.9 x 12.7 x 12.1mm - Roller Mount - - - - Aluminium - D
RS Stock No. 774-2802
Mfr. Part No.LAM 3 K 100 05
SGD89.36
Each
units
- 100mm 30mm 30mm 100 x 30 x 30mm 1.2K/W PCB Mount - Natural - - - - -
RS Stock No. 189-8145
Mfr. Part No.SK129-38,1-STS-220
SGD5.22
Each
units
- 38.1mm 42mm 25mm 38.1 x 42 x 25mm 5K/W Clip - Black - - - - -
RS Stock No. 867-0953
Mfr. Part No.SF-10-150-S
BrandSPREADFAST
SGD16.74
Each
units
Heat Pipe 150mm - - 10 x 150mm - - 10mm - - - Copper - SF
RS Stock No. 692-0650
Mfr. Part No.LA 6 100 24 V
SGD103.43
Each
units
Universal Rectangular Alu with fan 100mm 62mm 74mm 100 x 62 x 74mm 0.2K/W - - - - - - - -
RS Stock No. 234-2485
Mfr. Part No.510AB0500MB
SGD7.84
Each
units
Universal Rectangular Alu 50mm 65mm 20mm 50 x 65 x 20mm 3.3K/W - - Black - - - - -
RS Stock No. 712-4162
Mfr. Part No.241409B91200G
SGD21.38
Each
units
1/4 Brick DC/DC Converter 37mm 58mm 22.9mm 37 x 58 x 22.9mm 1.9K/W Screw - - - - - - -
RS Stock No. 692-5081
Mfr. Part No.165AB2500B
SGD175.98
Each
units
Universal Rectangular Alu 250mm 300mm 40mm 250 x 300 x 40mm 0.3K/W - - Black - - - - -
RS Stock No. 722-6818
Mfr. Part No.SK 570/50 SA
SGD18.08
Each
units
Universal Round Alu - - 50mm 70 (Dia.) x 50mm 1.3K/W Screw 70mm Black - - - LED -
RS Stock No. 674-4762
Mfr. Part No.ICK BGA 31x31x10
SGD3.12
Each
units
Universal Square Alu 31mm 31mm 10mm 31 x 31 x 10mm 17K/W Adhesive Foil, Conductive Foil - Black - - - BGA -
RS Stock No. 507-4999
Mfr. Part No.MA/B/100
SGD32.78
Each
units
Universal Rectangular Alu 100mm 97mm 25mm 100 x 97 x 25mm 1.9K/W - - Black - - - - -
RS Stock No. 880-5897
Mfr. Part No.568103B00000G
SGD21.405
Each (In a Pack of 250)
units
- 45.97mm 45.97mm 19.05mm 45.97 x 45.97 x 19.5mm 6.7°C/W Horizontal - Black - Black Anodized - TO-3 5681
RS Stock No. 360-8821
Mfr. Part No.KL 112.25.C SW
BrandSchaffner
SGD2.97
Each
units
- 25mm 11mm 16mm 25 x 11 x 16mm 18K/W Screw - Black - - - TO-220 -
RS Stock No. 712-4257
Mfr. Part No.ML7G
SGD0.628
Each (In a Pack of 5)
units
- 19mm 20mm 8.8mm 19 x 20 x 8.8mm 24°C/W Screw - Black - - - TO-220 -
RS Stock No. 162-1239
Mfr. Part No.AH12310V06000GE
SGD90.77
Each
units
- 152mm 105mm 44mm 152 x 105 x 44mm 0.9°C/W Screw - - Heatsinks - Aluminium Power Resistor HS
RS Stock No. 712-4241
Mfr. Part No.5900PBG
SGD1.012
Each (In a Pack of 5)
units
- 12.5mm 30.4mm 31.2mm 12.5 x 30.4 x 31.2mm 13°C/W PCB Through Hole - Black - - - TO-220 -
RS Stock No. 712-4396
Mfr. Part No.0S565/50/B
SGD7.63
Each
units
- 50mm 15mm 54mm 50 x 15 x 54mm 7.37K/W Clip - Black - - - - -
RS Stock No. 893-5311
Mfr. Part No.R2V-CT2-38E
BrandOhmite
SGD4.52
Each
units
- 35.2mm 22mm 38mm 35.2 x 22 x 38mm 9.8°C/W Clip - - - - Aluminium TO-220 R2
RS Stock No. 692-0660
Mfr. Part No.LA 7 100 24 V
SGD187.12
Each
units
Universal Rectangular Alu with fan 100mm 125mm 74mm 100 x 125 x 74mm 0.12K/W - - - - - - - -
RS Stock No. 880-5566
Mfr. Part No.531002C00000
SGD13,725.87
1 Pack of 10000
Pack(s)
- 12.7mm 34.92mm 25.4mm - 13.4°C/W - - - - Gold Chromate Aluminium TO-218 -
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