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 Priced to Clear
RS Stock No. 810-4217
Mfr. Part No.LMH020-HS00-0000-0000001
BrandCree
£9.73
Each
Units
LMH2-1250, LMH2-2000, LMH2-3000, LMH2-850 - - 40mm 87.2 (Dia.) x 40mm - Screw 87.2mm - - - - LED -
RS Stock No. 505-2860
Mfr. Part No.P3/180B
BrandSemikron
£51.10
Each
Units
SEMIPACK, SEMITRANS 180mm 125mm 135mm 135 x 125 x 180mm 0.39K/W - - Natural - - - - -
RS Stock No. 401-964
Mfr. Part No.TV40G
£1.908
Each (In a Pack of 20)
Units
- 38mm 28mm 22mm 38 x 28 x 22mm 9.9°C/W Screw - Black - - - TO-220 -
RS Stock No. 126-3113
Mfr. Part No.FIT0504
BrandDFRobot
£9.44
Each
Units
LattePanda 34.5mm 34.5mm 10mm 34.5 x 34.5 x 10mm - PCB Surface Mount, Screw - Blue - - Aluminium - -
RS Stock No. 271-870
Mfr. Part No.350AB1500B
£25.18
Each
Units
Universal Rectangular Alu 150mm 125mm 50mm 150 x 125 x 50mm 0.5K/W - - Black - - - - -
RS Stock No. 821-813
Mfr. Part No.2333B
£6.30
Each
Units
Universal Square Alu 45.72mm 44.58mm 16.51mm 45.72 x 44.58 x 16.51mm 7.2K/W Clip - Black - - - BGA -
RS Stock No. 189-8628
Mfr. Part No.SK42-75-SA
£12.11
Each
Units
Universal Rectangular Alu 75mm 200mm 25mm 75 x 200 x 25mm 1.4K/W - - Black - - Aluminium - -
RS Stock No. 158-540
Mfr. Part No.TDEX3132/100/FMF12G
£44.02
Each
Units
Universal Rectangular Alu 100mm 101.6mm 77mm 100 x 101.6 x 77mm 0.16K/W - - Black - - - - -
RS Stock No. 255-8523
Mfr. Part No.SK434/50SA
£4.22
Each
Units
- 50mm 50mm 40mm 50 x 50 x 40mm 3.1K/W - - Black - - - - -
RS Stock No. 403-162
Mfr. Part No.437856
£0.942
Each (In a Pack of 10)
Units
- 25mm 12.5mm 25mm 12.5 x 34.5 x 25mm 11.4K/W Solder - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 712-4279
Mfr. Part No.6396BG
£1.68
Each (In a Pack of 5)
Units
- 25.4mm 41.91mm 25.4mm 25.4 x 41.91 x 25.4mm 5.6°C/W - - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 903-3080
Mfr. Part No.109AB1500B
£9.86
Each
Units
Universal Rectangular Alu 150mm 100mm 15mm 150 x 100 x 15mm 0.6°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 880-1943
Mfr. Part No.ILA-EXTRUSION-01-0150.
£2.336
Each (In a Pack of 5)
Units
Duris P5 150mm 24mm 18.9mm - - - - - - - - LED -
RS Stock No. 722-6903
Mfr. Part No.SK 574/84 SA
£3.81
Each
Units
- 84mm 32.3mm 28mm 84 x 32.3 x 28mm 4K/W Clip - Black - - - - -
RS Stock No. 189-8713
Mfr. Part No.SK53-100-SA
£11.56
Each
Units
- 100mm 180mm 48mm 100 x 180 x 48mm 0.6K/W - - Black - - - - -
RS Stock No. 903-3107
Mfr. Part No.177AB2000B
£78.43
Each
Units
Universal Rectangular Alu 200mm 300mm 83mm 200 x 300 x 83mm 0.07°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 126-3115
Mfr. Part No.FIT0506
BrandDFRobot
£0.838
Each (In a Pack of 5)
Units
LattePanda 13.2mm 12.1mm 4.8mm 13.2 x 12.1 x 4.8mm - PCB Surface Mount - Orange Surface Mount Component Cooling - Copper - -
RS Stock No. 189-8432
Mfr. Part No.SK58-50-SA
£9.83
Each
Units
Universal Rectangular Alu 50mm 150mm 27mm 50 x 150 x 27mm 1.7K/W - - Black - - - - -
RS Stock No. 401-548
Mfr. Part No.5FG
£0.506
Each (In a Pack of 50)
Units
- 16mm 16mm 12.7mm 16 x 16 x 12.7mm 45.2K/W PCB Through Hole - Black - - - TO-220 -
RS Stock No. 821-807
Mfr. Part No.2321B
£1.39
Each
Units
Universal Square Alu 43.18mm 41.28mm 8.89mm 43.18 x 41.28 x 8.89mm 10°C/W Clip - Black - - - PGA -
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The Arcol Ohmite heatsink is designed to be ...
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The Arcol Ohmite heatsink is designed to be used with panel mount aluminium housed resistors. It is suitable for their own resistors. Each heatsink is characterized and customized with a specific resistor size, providing a complete thermal solution. All the Ohmite products are designed to sustain a long lifetime. • ...
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Description:
The Arcol Ohmite heatsink is designed to be used with panel mount aluminium housed resistors. It is suitable for their own resistors. Each heatsink is characterized and customized with a specific resistor size, providing a complete thermal solution. All the Ohmite products are designed to sustain a long lifetime. • ...
All attachable heatsinks are made from black anodised ...
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All attachable heatsinks are made from black anodised diecast aluminium.Heatsinks in the FK 237 Series have the following features:. A very slim design ensures that it does not require much space Easy assembly by sliding the heatsink onto the TO220 housing Optimal heat transfer as the fastening clips on the ...