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. 300-2891
Mfr. Part No.KL 195/50.8/SWI
BrandSeifert
TWD176.00
Each
units
- 42mm 25.4mm 50.8mm 42 x 25.4 x 50.8mm 4.2K/W Solder - Black - - - - -
RS Stock No. 168-6346
Mfr. Part No.WA 203
BrandSeifert
TWD1,405.00
Each
units
Universal Rectangular Alu 1m 32mm 20mm 1000 x 32 x 20mm - - - Black - - Aluminium - -
RS Stock No. 168-6295
Mfr. Part No.WA 502
BrandSeifert
TWD1,084.00
Each
units
Universal Rectangular Alu 1m 60mm 15mm 1000 x 60 x 15mm - - - Black - - Aluminium - -
RS Stock No. 168-6245
Mfr. Part No.KL167SW
BrandSeifert
TWD71.00
Each
units
- 30mm 25.4mm 12.7mm 30 x 25.4 x 12.7mm 15K/W Solder - Black - - - TO-220 -
RS Stock No. 169-6999
Mfr. Part No.KL157 KOMBI SW
BrandSeifert
TWD79.00
Each
units
- 41.3mm 33mm 25.4mm 41.3 x 33 x 25.4mm 25.4K/W Clip - - - - - - -
RS Stock No. 300-2885
Mfr. Part No.KL 195/38.1/SWI
BrandSeifert
TWD165.00
Each
units
- 42mm 25.4mm 38.1mm 42 x 25.4 x 38.1mm 5K/W Solder - Black - - - - -
RS Stock No. 180-5418
Mfr. Part No.KK 633
BrandSeifert
TWD26.00
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. 169-6933
Mfr. Part No.KL176 SW
BrandSeifert
TWD189.00
Each
units
- 40mm 27mm 19.1mm 40 x 27 x 19.1mm 12K/W PCB Surface Mount - Black - - - TO-3 -
RS Stock No. 168-8061
Mfr. Part No.WA204B
BrandSeifert
TWD1,768.00
Each
units
Universal Rectangular Alu 1m 79mm 15mm 1000 x 79 x 15mm - - - - - - Aluminium - -
RS Stock No. 169-9831
Mfr. Part No.WA400 8P
BrandSeifert
TWD66.00
Each
units
Universal Rectangular Alu 25mm 16mm 11mm 25 x 16 x 11mm 18K/W - - - - - Aluminium - -
RS Stock No. 169-9825
Mfr. Part No.WA116 6
BrandSeifert
TWD122.00
Each
units
- 37.5mm 34.2mm 15mm 37.5 x 36 x 15mm 6K/W - - Black - - - - -
RS Stock No. 169-9803
Mfr. Part No.WA201 5
BrandSeifert
TWD333.00
Each
units
- 75mm 100mm 28mm 75 x 100 x 28mm 2.5K/W - - Black - - - - -
RS Stock No. 168-6217
Mfr. Part No.KL105.29SW
BrandSeifert
TWD48.00
Each
units
- 27mm 16mm 33mm 27 x 16 x 33mm 19K/W Solder - Black - - - TO-220 -
RS Stock No. 168-6318
Mfr. Part No.WA 408
BrandSeifert
TWD3,143.00
Each
units
Universal Rectangular Alu 1m 88mm 35mm 1000 x 88 x 35mm - - - Black - - Aluminium - -
RS Stock No. 169-9847
Mfr. Part No.WA243 1
BrandSeifert
TWD3,062.00
Each
units
Universal Rectangular Alu 150mm 300mm 40mm 150 x 300 x 40mm 0.3K/W - - - - - Aluminium - -
RS Stock No. 168-6289
Mfr. Part No.WA 470
BrandSeifert
TWD2,025.00
Each
units
Universal Rectangular Alu 1m 100mm 15mm 1000 x 100 x 15mm - - - Black - - Aluminium - -
RS Stock No. 169-9780
Mfr. Part No.WA208 14
BrandSeifert
TWD418.00
Each
units
- 75mm 54mm 31.6mm 75 x 54 x 31.6mm 2.2K/W - - Black - - - TO-3 -
RS Stock No. 169-9897
Mfr. Part No.WA502 8
BrandSeifert
TWD324.00
Each
units
- 37.5mm 60mm 15mm 37.5 x 60 x 15mm 6K/W - - - - - - TO-3 -
RS Stock No. 168-6302
Mfr. Part No.WA 507
BrandSeifert
TWD2,734.00
Each
units
Universal Rectangular Alu 1m 100mm 28mm 1000 x 100 x 28mm - - - Black - - Aluminium - -
RS Stock No. 299-3336
Mfr. Part No.KL 195/63.5/SW
BrandSeifert
TWD202.00
Each
units
- 42mm 25.4mm 63.5mm 42 x 25.4 x 63.5mm 3.6K/W Solder - Black - - - - -