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. 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 -
RS Stock No. 712-4197
Mfr. Part No.574502B00000G
TWD32.80
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. 189-9110
Mfr. Part No.FK225SAL1
TWD46.00
Each
units
- 38mm 24.5mm 27mm 38 x 24.5 x 27mm 9.9K/W Screw - Black - - - TO-220 -
RS Stock No. 123-5636
Mfr. Part No.SF-CHS-353510-PC
BrandSPREADFAST
TWD83.00
Each
units
Universal Square Ceramic 35mm 35mm 10mm 35 x 35 x 10mm 7.7 °C/W @ 400 lfm, 15.4 °C/W @ 100 lfm Adhesive, Screw - White Chipset, Cooling, IC Cooling, LED, Metal Heat Sink Replacement, Power Modules - - - Ceramic Heat Spreader Circular Pin Fin
RS Stock No. 674-4769
Mfr. Part No.ICK BGA 40x40x10
TWD100.00
Each
units
Universal Square Alu 40mm 40mm 10mm 40 x 40 x 10mm 13.8K/W Adhesive Foil, Conductive Foil - Black - - Aluminium BGA -
RS Stock No. 221-2081
Mfr. Part No.ICKPEN38
TWD739.00
Each
units
- 49.5mm 49.5mm 38mm 49.5 x 49.5 x 38mm 4K/W Adhesive Foil - Black - - - - -
RS Stock No. 674-4712
Mfr. Part No.SK454-100SA
TWD78.00
Each
units
- 100mm 21.45mm 19mm 100 x 21.45 x 19mm 6K/W - - Black - - - - -
RS Stock No. 789-8602
Mfr. Part No.PPN1000B
TWD237.00
Each
units
- 100mm 50mm 28mm 100 x 50 x 28mm 3.1°C/W Screw - Black - - - TO-220 -
RS Stock No. 104-092
Mfr. Part No.637303B03000
TWD1,381.00
Each
units
Universal Square Alu 76.1mm 76.1mm 57.15mm 76.1 x 57.15 x 76.1mm 1.88°C/W - - Black - Black Anodized Aluminium LED -
RS Stock No. 184-6716
Mfr. Part No.SFH2501-07L
BrandSPREADFAST
TWD124.00
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
RS Stock No. 722-6883
Mfr. Part No.SK 480/84 SA
TWD133.00
Each
units
- 84mm 28mm 10.3mm 84 x 28 x 10.3mm 8K/W Clip - Black - - - - -
RS Stock No. 184-6718
Mfr. Part No.SFH3001-08L
BrandSPREADFAST
TWD131.00
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. 674-4737
Mfr. Part No.ICK PGA 17x17x12
TWD160.00
Each
units
Universal Square Alu 43.6mm 43.6mm 12.3mm 43.6 x 43.6 x 12.3mm 9K/W Adhesive Foil, Conductive Foil - Black - - Aluminium PGA -
RS Stock No. 856-8406
Mfr. Part No.RHS100
TWD1,215.00
Each
units
- 48mm 44mm 82mm 48 x 44 x 82mm 3.1°C/W DIN Rail - - - - - SSR -
RS Stock No. 489-6164
Mfr. Part No.MBH42.5002-25P/2.6
BrandMalico
TWD335.00
Each
units
Clip 42.5mm 42.5mm 25mm 42.5 x 42.5 x 25mm - Clip - Black - - - - -
RS Stock No. 234-2491
Mfr. Part No.510AB1000MB
TWD187.00
Each
units
Universal Rectangular Alu 100mm 65mm 20mm 100 x 65 x 20mm 2.3K/W - - Black - - Aluminium - -
RS Stock No. 722-6892
Mfr. Part No.SK 481/84 SA
TWD219.00
Each
units
- 84mm 30mm 45mm 84 x 30 x 45mm 3K/W Clip - Black - - - - -
RS Stock No. 722-6912
Mfr. Part No.SK 487/25 SA
TWD116.00
Each
units
- 25mm 52.3mm 28mm 25 x 52.3 x 28mm 6.5K/W Clip - Black - - - - -
RS Stock No. 692-0694
Mfr. Part No.ICK SMD F 10 MI
TWD65.40
Each (In a Pack of 5)
units
Universal Rectangular Alu 10mm 8mm 6mm 10 x 8 x 6mm 71K/W - - Black - - Aluminium DIL-IC -
RS Stock No. 674-4781
Mfr. Part No.ICK S 10x10x12,5
TWD171.00
Each
units
Universal Square Alu 10mm 10mm 12.5mm 10 x 10 x 12.5mm 26.3K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -