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. 504-0738
Mfr. Part No.ICKSMDF8SA
£0.514
Each (In a Pack of 10)
Units
Universal Rectangular Alu 8mm 8mm 6mm 8 x 8 x 6mm 74K/W - - Black - - - DIL-IC -
RS Stock No. 722-6805
Mfr. Part No.SK 577/20 SA
£3.28
Each
Units
Universal Round Alu - - 20mm 50 (Dia.) x 20mm 2.4K/W Screw 50mm Black - - - LED -
RS Stock No. 712-4409
Mfr. Part No.0S565/150/B
£3.67
Each
Units
- 150mm 15mm 54mm 150 x 15 x 54mm 3.43K/W Clip - Black - - - - -
RS Stock No. 674-4769
Mfr. Part No.ICK BGA 40x40x10
£2.17
Each
Units
Universal Square Alu 40mm 40mm 10mm 40 x 40 x 10mm 13.8K/W Adhesive Foil, Conductive Foil - Black - - - BGA -
RS Stock No. 507-5194
Mfr. Part No.S561/B/100
£7.79
Each
Units
Universal Rectangular Alu 100mm 120mm 37mm 100 x 120 x 37mm 1.1K/W - - Black - - - - -
RS Stock No. 674-4747
Mfr. Part No.ICK BGA 10x10x10
£1.21
Each
Units
Universal Square Alu 10mm 10mm 10mm 10 x 10 x 10mm 28.5K/W Adhesive Foil, Conductive Foil - Black - - - BGA -
RS Stock No. 674-4793
Mfr. Part No.ICK S 14x14x10
£4.06
Each
Units
Universal Square Alu 14mm 14mm 10mm 14 x 14 x 10mm 9.8K/W Adhesive Foil, Conductive Foil - - - - - - -
RS Stock No. 750-0908
Mfr. Part No.BGA STD 050
£6.08
1 Bag of 5
Bag(s)
- 20mm 20mm 19.1mm 20 x 20 x 19.1mm 14K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 189-8319
Mfr. Part No.SK95-25-SA-220
£1.28
Each
Units
- 25mm 12.6mm 6.5mm 25 x 12.6 x 6.5mm 36K/W Screw - Black - - - TO-220 -
RS Stock No. 692-0660
Mfr. Part No.LA 7 100 24 V
£117.41
Each
Units
Universal Rectangular Alu with fan 100mm 125mm 74mm 100 x 125 x 74mm 0.12K/W - - - - - - - -
RS Stock No. 810-4201
Mfr. Part No.LMH020-HS00-0000-0000002
BrandCree
£12.48
Each
Units
LMH2-1250, LMH2-2000, LMH2-3000, LMH2-4000, LMH2-850 - - 55mm 110 (Dia.) x 55mm - Screw 110mm - - - - LED -
RS Stock No. 750-0951
Mfr. Part No.BGA STD 115
£1.57
Each
Units
- 40mm 40mm 18mm 40 x 40 x 18mm 8.2K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 507-4753
Mfr. Part No.577102B00000G
£0.242
Each (In a Pack of 5)
Units
- 13.21mm 19.05mm 9.52mm 13.21 x 19.05 x 9.52mm 25.9°C/W - - Black - Black Anodized - TO-220 -
RS Stock No. 158-534
Mfr. Part No.TDX3358/200FMF12G
£105.25
Each
Units
Universal Rectangular Alu with fan 200mm 135mm 98mm 200 x 135 x 98mm 0.06K/W - - Clear - - - - -
RS Stock No. 774-2818
Mfr. Part No.LAM 5 50 05
£46.46
Each
Units
Universal Rectangular Alu with fan 50mm 50mm 50mm 50 x 50 x 50mm 1.38K/W PCB Mount - Natural - - - - -
RS Stock No. 674-4838
Mfr. Part No.ICK S 50x50x25
£10.12
Each
Units
Universal Square Alu 50mm 50mm 25mm 50 x 50 x 25mm 2.4K/W Adhesive Foil, Conductive Foil - - - - - - -
RS Stock No. 712-4415
Mfr. Part No.0S508/150/B
£9.33
Each
Units
- 150mm 39mm 31.5mm 150 x 39 x 31.5mm - - - - - - - - -
RS Stock No. 674-4740
Mfr. Part No.ICK PGA 6x6x14
£1.12
Each
Units
Universal Square Alu 14mm 14mm 14mm 14 x 14 x 14mm 18.6K/W Adhesive Foil, Conductive Foil - Black - - - PGA -
RS Stock No. 189-8707
Mfr. Part No.SK47-75-SA
£16.96
Each
Units
Universal Rectangular Alu 75mm 200mm 40mm 75 x 200 x 40mm 1.05K/W - - Black - - - - -
RS Stock No. 674-4721
Mfr. Part No.SK508-100SA
£11.44
Each
Units
Universal Square Alu 100mm 100mm 25mm 100 x 100 x 25mm 2K/W - - Black - - - - -
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