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. 360-8809
Mfr. Part No.KL 112.25.A SW
BrandSchaffner
TWD78.00
Each
units
- 25mm 11mm 16mm 25 x 11 x 16mm 18K/W Screw - Black - - - TO-220 -
RS Stock No. 218-2261
Mfr. Part No.KL224-50.8SW
BrandSchaffner
TWD115.00
Each
units
- 50.8mm 29mm 12mm 50.8 x 29 x 12mm 7.5K/W Clip - Black - - - - -
RS Stock No. 360-8821
Mfr. Part No.KL 112.25.C SW
BrandSchaffner
TWD68.00
Each
units
- 25mm 11mm 16mm 25 x 11 x 16mm 18K/W Screw - Black - - - TO-220 -
RS Stock No. 218-2211
Mfr. Part No.KL205-38.1SW
BrandSchaffner
TWD110.00
Each
units
- 38.1mm 32mm 14mm 38.1 x 32 x 14mm 9K/W Clip - Black - - - - -
RS Stock No. 168-8099
Mfr. Part No.WA408B
BrandSchaffner
TWD2,165.00
Each
units
Universal Rectangular Alu 1m 88mm 35mm - - - - - - - - - -
RS Stock No. 218-2047
Mfr. Part No.RAWA230-0
BrandSchaffner
TWD4,416.00
Each
units
Universal Rectangular Alu 1m 150mm 27mm - - - - Black - - - - -
RS Stock No. 360-8786
Mfr. Part No.WA 628.003
BrandSchaffner
TWD55.00
Each
units
- 13.21mm 12.7mm 19.05mm 13.21 x 12.7 x 19.05mm 27°C/W Clip - - - - - TO-220 -
RS Stock No. 410-0003
Mfr. Part No.WA 412.0B
BrandSchaffner
TWD1,125.00
Each
units
Universal Rectangular Alu 1m 29mm 11.5mm 1000 x 29 x 11.5mm 5.4K/W - - - - - - - -
RS Stock No. 360-8764
Mfr. Part No.WA 628.001
BrandSchaffner
TWD66.00
Each
units
- 13.21mm 19.05mm 19.05mm 13.21 x 6.35 x 19.05mm 35°C/W Clip - - - - - TO-220 -
RS Stock No. 168-8106
Mfr. Part No.WA470B
BrandSchaffner
TWD2,198.00
Each
units
Universal Rectangular Alu 1m 100mm 15mm - - - - - - - - - -
RS Stock No. 218-2104
Mfr. Part No.RAWA560-0
BrandSchaffner
TWD3,629.00
Each
units
Universal Rectangular Alu 1m 66mm 40mm - - - - Black - - - - -
RS Stock No. 218-2277
Mfr. Part No.KL194CLIP
BrandSchaffner
TWD13.50
Each (In a Pack of 10)
units
Clip - - - - 48K/W - - - - - - - -
RS Stock No. 360-8770
Mfr. Part No.WA 628.002
BrandSchaffner
TWD56.00
Each
units
- 13.21mm 19.05mm 19.05mm 13.21 x 9.53 x 19.05mm 30°C/W Clip - - - - - TO-220 -
RS Stock No. 218-2081
Mfr. Part No.RAWA410-0
BrandSchaffner
TWD1,646.00
Each
units
Universal Rectangular Alu 1m 47.5mm 19mm - - - - Black - - - - -
RS Stock No. 177-1804
Mfr. Part No.WA212-0B
BrandSchaffner
TWD4,817.00
Each
units
Universal Rectangular Alu 1m 150mm 27mm 1000 x 150 x 27mm - - - - - - - - -
RS Stock No. 218-2249
Mfr. Part No.KL224-25.4SW
BrandSchaffner
TWD37.00
Each
units
- 25.4mm 29mm 12mm 25.4 x 29 x 12mm 12K/W Clip - Black - - - - -
RS Stock No. 409-9925
Mfr. Part No.WA 217.0
BrandSchaffner
TWD4,563.00
Each
units
Universal Rectangular Alu 1m 200mm 25mm 1000 x 200 x 25mm 0.55K/W - - Black - - - - -
RS Stock No. 360-8815
Mfr. Part No.KL 112.25.B SW
BrandSchaffner
TWD66.00
Each
units
- 25mm 11mm 16mm 25 x 11 x 16mm 18K/W Screw - Black - - - TO-220 -
RS Stock No. 168-8055
Mfr. Part No.WA203B
BrandSchaffner
TWD914.00
Each
units
Universal Rectangular Alu 1m 32mm 20mm 1000 x 32 x 20mm - - - Silver - - - - -
RS Stock No. 360-8758
Mfr. Part No.WA 627.003
BrandSchaffner
TWD66.00
Each
units
- 13.21mm 12.7mm 19.05mm 13.21 x 12.7 x 19.05mm 27°C/W Clip - - - - - TO-220 -