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. 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 -
RS Stock No. 507-4955
Mfr. Part No.EW/B/75
£8.86
Each
Units
Universal Rectangular Alu 75mm 150mm 25mm 75 x 150 x 25mm 1.4K/W - - Black - - - - -
RS Stock No. 712-4295
Mfr. Part No.TV5G
£0.90
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. 698-8117
Mfr. Part No.FK 244 13 D PAK
£0.73
Each (In a Pack of 5)
Units
- 23mm 13mm 10mm 23 x 13 x 10mm 25K/W Solder - Silver - - - - -
RS Stock No. 698-8111
Mfr. Part No.FK 244 13 D2 PAK
£0.934
Each (In a Pack of 5)
Units
- 26mm 13mm 10mm 26 x 13 x 10mm 22.8K/W Solder - Silver - - - - -
RS Stock No. 189-8533
Mfr. Part No.SK85-100-SA
£20.10
Each
Units
Universal Rectangular Alu 100mm 160mm 40mm 100 x 160 x 40mm 0.9K/W - - Black - - - - -
RS Stock No. 903-3087
Mfr. Part No.109AB1000B
£7.63
Each
Units
Universal Square Alu 100mm 100mm 15mm 100 x 100 x 15mm 0.83°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - -
RS Stock No. 692-0685
Mfr. Part No.LAM 4 100 5 V
£51.54
Each
Units
Universal Rectangular Alu with fan 100mm 40mm 40mm 100 x 40 x 40mm 1.2K/W - - - - - - - -
RS Stock No. 234-2514
Mfr. Part No.515AB1000MB
£4.83
Each
Units
Universal Rectangular Alu 100mm 88mm 25mm 100 x 88 x 25mm 1.5K/W - - Black - - - - -
RS Stock No. 780-5928
Mfr. Part No.ILA-HSINK-STAR-50X60MM-BLK-K
£18.80
Each
Units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 4, Stanley 1, Stanley 4 - - 60mm 50 (Dia.) x 60mm - Screw 50mm Black - - - LED -
RS Stock No. 221-2110
Mfr. Part No.SK409-50,8STC
£2.03
Each
Units
- 50.8mm 45mm 12.7mm 50.8 x 45 x 12.7mm 6.2K/W Clip - Black - - - - -
RS Stock No. 867-0922
Mfr. Part No.SF-05-150-S
BrandSPREADFAST
£6.57
Each
Units
Heat Pipe 150mm - - 5 x 150mm - - 5mm - - - Copper - -
RS Stock No. 189-8151
Mfr. Part No.SK129-50,8-STS-220
£2.59
Each
Units
- 50.8mm 42mm 25mm 50.8 x 42 x 25mm 4K/W Clip - Black - - - - -
RS Stock No. 402-709
Mfr. Part No.P35/250A
BrandSemikron
£57.62
Each
Units
SEMIPACK, SEMIPONT, SEMITRANS, Universal Rectangular Alu 250mm 200mm 40mm 250 x 200 x 40mm 0.41K/W - - Black - - - - -
RS Stock No. 189-8202
Mfr. Part No.SK88-100-SA
£9.14
Each
Units
- 100mm 100mm 50mm 100 x 100 x 50mm 0.85K/W - - Black - - - TO-3 -
RS Stock No. 400-056
Mfr. Part No.193AB1500B
£39.85
Each
Units
Universal Rectangular Alu 150mm 240mm 46mm 150 x 240 x 46mm 0.4K/W - - Black - - - - -
RS Stock No. 712-4437
Mfr. Part No.0S506/150/B
£5.50
Each
Units
- 150mm 27mm 50mm 150 x 27 x 50mm 2.46K/W Clip - Black - - - - -
RS Stock No. 722-6906
Mfr. Part No.SK 574/37,5 SA
£1.90
Each
Units
- 37.5mm 32.3mm 28mm 37.5 x 32.3 x 28mm 6.5K/W Clip - Black - - - - -
RS Stock No. 189-8145
Mfr. Part No.SK129-38,1-STS-220
£2.33
Each
Units
- 38.1mm 42mm 25mm 38.1 x 42 x 25mm 5K/W Clip - Black - - - - -
RS Stock No. 504-0738
Mfr. Part No.ICKSMDF8SA
£0.428
Each (In a Pack of 10)
Units
Universal Rectangular Alu 8mm 8mm 6mm 8 x 8 x 6mm 74K/W - - Black - - - DIL-IC -
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The LA ICK series heatsinks stand out due ...
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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 spaceEasy assembly by sliding the heatsink onto the TO220 housingOptimal heat transfer as the fastening clips on the TO 220 ...
High-performance precision-forged clip-attachment heatsinks for BGA chipsets. AL6063 ...
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High-performance precision-forged clip-attachment heatsinks for BGA chipsets. AL6063 grade aluminium at 201 W/m K thermal conductivityAvailable in wing-fin and pin-fin types giving high surface area to volume, and excellent thermal performanceAttachment by plastic clipExcellent performance for both natural convection and low to medium airflow levels with low pressure drop.