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. 180-5418
Mfr. Part No.KK 633
BrandSeifert
SGD0.96
Each
units
- 20.3mm 6.8mm 25.4mm 20.3 x 6.8 x 25.4mm 21K/W Clip - Black - - - TO-220 -
RS Stock No. 692-5107
Mfr. Part No.610AB1000B
SGD13.54
Each
units
Universal Rectangular Alu 100mm 98.5mm 53mm 100 x 98.5 x 53mm 1.7K/W - - Black - - - - -
RS Stock No. 789-8560
Mfr. Part No.150AB1000B
SGD30.11
Each
units
Universal Rectangular Alu 100mm 96mm 40mm 100 x 96 x 40mm 1.4°C/W Clamp - Black - - - - -
RS Stock No. 504-0659
Mfr. Part No.ICKBGA23X23
SGD3.10
Each
units
Universal Square Alu 23mm 23mm 6mm 23 x 23 x 6mm 22.5 → 6.5K/W Conductive Adhesive, Conductive Foil - Black - - - BGA -
RS Stock No. 504-0744
Mfr. Part No.ICKSMDF10
SGD1.138
Each (In a Pack of 10)
units
Universal Rectangular Alu 10mm 8mm 6mm 10 x 8 x 6mm 71K/W - - Black - - - DIL-IC -
RS Stock No. 674-4719
Mfr. Part No.SK454-75SA
SGD2.67
Each
units
- 75mm 21.45mm 19mm 75 x 21.45 x 19mm 7K/W - - Black - - - - -
RS Stock No. 300-2891
Mfr. Part No.KL 195/50.8/SWI
BrandSeifert
SGD7.57
Each
units
- 42mm 25.4mm 50.8mm 42 x 25.4 x 50.8mm 4.2K/W Solder - Black - - - - -
RS Stock No. 189-8763
Mfr. Part No.SK02-100-SA
SGD18.27
Each
units
- 100mm 115mm 63mm 100 x 115 x 63mm 1.3K/W Screw - Black - - - - -
RS Stock No. 184-6718
Mfr. Part No.SFH3001-08L
BrandSPREADFAST
SGD6.06
Each
units
Universal Square Alu 30mm 30mm 8mm 30 x 30 x 8mm - - - Black Suitable for Use with a Wide Range of Semi-Conductor Devices with Flat Surfaces - Aluminium - SFH
RS Stock No. 189-8549
Mfr. Part No.SK08-37,5-SA
SGD8.03
Each
units
- 37.5mm 88mm 35mm 37.5 x 88 x 35mm 2.5K/W - - Black - - - - -
RS Stock No. 712-4197
Mfr. Part No.574502B00000G
SGD0.404
Each (In a Pack of 5)
units
- 19.05mm 21.84mm 10.03mm 10.03 x 21.84 x 19.05mm 21.2°C/W Spring Mount - Black - Black Anodized - TO-202, TO-220 -
RS Stock No. 880-5774
Mfr. Part No.320205B00000G
SGD4,289.53
1 Pack of 2000
Pack(s)
- - - 6.35mm 12.7 x 6.35mm 63°C/W - 12.7mm Black Through Hole Discrete Semiconductors Black Anodized Aluminium TO-5 3202
New
RS Stock No. 225-925
Mfr. Part No.PC1820-25-PB-SN
SGD1.80
Each
units
DIP 20.5mm 18.5mm 25mm 20.5 x 18.5 x 25mm 18.5K/W Screw - Black - - - - -
RS Stock No. 490-7264
Mfr. Part No.S460/B/37.5
SGD28.67
Each
units
- 37.5mm 38mm 54mm 37.5 x 38 x 54mm 4.7K/W - - Black - - - TO-220 -
RS Stock No. 880-5982
Mfr. Part No.MAX03NG
SGD0.302
Each (In a Pack of 100)
units
Clip - - - - - - - - - - - - -
RS Stock No. 712-4437
Mfr. Part No.0S506/150/B
SGD10.67
Each
units
- 150mm 27mm 50mm 150 x 27 x 50mm 2.46K/W Clip - Black - - - - -
RS Stock No. 507-4898
Mfr. Part No.EM/B/150
SGD69.47
Each
units
Universal Rectangular Alu 150mm 200mm 40mm 150 x 200 x 40mm 0.48K/W - - Black - - - - -
RS Stock No. 123-5620
Mfr. Part No.SF-CHS-434306P
BrandSPREADFAST
SGD3.74
Each
units
Universal Square Ceramic 43mm 43mm 6mm 43 x 43 x 6mm 13.2 °C/W @ 400 lfm, 22.4 °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. 692-0694
Mfr. Part No.ICK SMD F 10 MI
SGD2.964
Each (In a Pack of 5)
units
Universal Rectangular Alu 10mm 8mm 6mm 10 x 8 x 6mm 71K/W - - Black - - - DIL-IC -
RS Stock No. 184-6716
Mfr. Part No.SFH2501-07L
BrandSPREADFAST
SGD5.74
Each
units
Universal Square Alu 25mm 25mm 7mm 25 x 25 x 7mm - - - Black Suitable for Use with a Wide Range of Semi-Conductor Devices with Flat Surfaces - Aluminium - SFH
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