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. 674-4797
Mfr. Part No.ICK S 25x25x18,5
SGD7.29
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. 780-5912
Mfr. Part No.ILA-HSINK-STAR-50X40MM-BLU-K
SGD31.29
Each
units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 4, Stanley 1, Stanley 4 - - 40mm 50 (Dia.) x 40mm - Screw 50mm Blue - - - LED -
RS Stock No. 712-4295
Mfr. Part No.TV5G
SGD1.54
Each (In a Pack of 5)
units
- 19mm 22mm 19mm 19 x 22 x 19mm 21°C/W Screw - Black - - - TO-220 -
RS Stock No. 810-4201
Mfr. Part No.LMH020-HS00-0000-0000002
BrandCree
SGD20.24
Each
units
LMH2-1250, LMH2-2000, LMH2-3000, LMH2-4000, LMH2-850 - - 55mm 110 (Dia.) x 55mm - Screw 110mm - - - - LED -
RS Stock No. 893-4516
Mfr. Part No.C264-030-1VE
BrandOhmite
SGD6.31
Each
units
- 30mm 20.47mm 38mm 30 x 20.47 x 38mm - Clip - - - - Aluminium TO-264 C
RS Stock No. 189-8965
Mfr. Part No.LAICK18X18F
SGD106.00
Each
units
Universal Square Alu with fan 46.9mm 20mm 46.48mm 46.9 x 20 x 46.48mm 1.5K/W Conductive Foil - Black - - - - -
RS Stock No. 856-8406
Mfr. Part No.RHS100
SGD74.02
Each
units
- 48mm 44mm 82mm 48 x 44 x 82mm 3.1°C/W DIN Rail - - - - - SSR -
RS Stock No. 189-9081
Mfr. Part No.FK237SA220H
SGD4.00
Each
units
- 19.05mm 14.5mm 12.7mm 19.05 x 14.5 x 12.7mm 21K/W Clip - Black - - - TO-220 -
RS Stock No. 674-4832
Mfr. Part No.ICK S R 28,5x18,5
SGD9.02
Each
units
Universal Round Alu - - 18.5mm 28.5 (Dia.) x 18.5mm 4.25K/W Adhesive Foil, Conductive Foil 28.5mm - - - - - -
RS Stock No. 234-2356
Mfr. Part No.PPD0250P
SGD2.99
Each
units
- 25mm 35mm 25mm 25 x 35 x 25mm 9°C/W Clip - Black - - - - -
RS Stock No. 826-1411
Mfr. Part No.PG1W-12-60-L3BN
Brandebm-papst
SGD82.15
Each
units
Xicato 84mm 70mm 60.25mm 2.835 (Dia.) x 2.372 (L)in 0.94°C/W - - Black - Black Anodized - LED -
RS Stock No. 681-1540
Mfr. Part No.HAL-F12T
BrandTDK-Lambda
SGD50.86
Each
units
1/1 Brick AC/DC Converter, PFE 69.9mm 122mm 35mm 69.9 x 122 x 35mm 0.97K/W Screw - - - - - - -
RS Stock No. 403-184
Mfr. Part No.437874
SGD1.53
Each (In a Pack of 10)
units
- 50mm 34.5mm 50mm 12.5 x 34.5 x 50mm 8.8K/W Solder - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 184-6722
Mfr. Part No.SFH4001-09L
BrandSPREADFAST
SGD7.12
Each
units
Universal Square Alu 40mm 40mm 9mm 40 x 40 x 9mm - - - Black Suitable for Use with a Wide Range of Semi-Conductor Devices with Flat Surfaces - Aluminium - SFH
RS Stock No. 880-5799
Mfr. Part No.531302B02500G
SGD6,164.55
1 Pack of 4500
Pack(s)
- 12.7mm 34.92mm 63.5mm 34.92 x 12.7 x 63.5mm 8°C/W - - Black Through Hole Discrete Semiconductors Black Anodized Aluminium TO-202, TO-220 5313
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. 168-6330
Mfr. Part No.WA 204
BrandSeifert
SGD73.00
Each
units
- 1m 79mm 15mm - - - - Black - - - TO-3 -
RS Stock No. 189-9261
Mfr. Part No.FK214SACB
SGD1.22
Each
units
- 30mm 25.4mm 13mm 30 x 25.4 x 13mm 15K/W - - Black - Black Anodized Plastic - -
RS Stock No. 402-709
Mfr. Part No.P35/250A
BrandSemikron
SGD111.78
Each
units
SEMIPACK, SEMIPONT, SEMITRANS, Universal Rectangular Alu 250mm 200mm 40mm 250 x 200 x 40mm 0.41K/W - - Black - - - - -
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