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. 692-0672
Mfr. Part No.LA 7 100 12 V
TWD6,193.00
Each
units
- 100mm 125mm 74mm 100 x 125 x 74mm 0.12K/W - - - - - - - -
RS Stock No. 104-086
Mfr. Part No.766203B04000
TWD1,240.00
Each
units
Universal Square Alu 101.6mm 101.6mm 31.75mm 101.6 x 101.6 x 31.75mm 1.79°C/W - - Black - Black Anodized Aluminium - -
RS Stock No. 674-4734
Mfr. Part No.ICK PGA 14x14x14
TWD103.00
Each
units
Universal Square Alu 35mm 35mm 14mm 35 x 35 x 14mm 9.6K/W Adhesive Foil, Conductive Foil - Black - - Aluminium PGA -
RS Stock No. 189-8319
Mfr. Part No.SK95-25-SA-220
TWD43.00
Each
units
- 25mm 12.6mm 6.5mm 25 x 12.6 x 6.5mm 36K/W Screw - Black - - - TO-220 -
RS Stock No. 189-8117
Mfr. Part No.SK104-50,8-STS-220
TWD89.00
Each
units
- 50.8mm 34.9mm 12.7mm 50.8 x 34.9 x 12.7mm 9K/W Clip - Black - - - TO-220 -
RS Stock No. 674-4719
Mfr. Part No.SK454-75SA
TWD86.00
Each
units
- 75mm 21.45mm 19mm 75 x 21.45 x 19mm 7K/W - - Black - - - - -
RS Stock No. 789-8609
Mfr. Part No.LS50
TWD73.00
Each
units
- 45mm 41.2mm 43mm 45 x 41.2 x 43mm 4°C/W - - Black - - - TO-3 -
RS Stock No. 712-4251
Mfr. Part No.ML8G
TWD12.20
Each (In a Pack of 5)
units
- 12.3mm 29mm 35mm 12.3 x 29 x 35mm 13°C/W Clip - Black - - - TO-220 -
RS Stock No. 774-2805
Mfr. Part No.LAM 5 50 12
TWD1,664.00
Each
units
Universal Rectangular Alu with fan 50mm 50mm 50mm 50 x 50 x 50mm 1.02K/W PCB Mount - Natural - - Aluminium - -
New
RS Stock No. 216-3049
Mfr. Part No.A15217-RS
TWD1,503.00
Each
units
DC Motor Controller, Power Controller, PSR, Pulsed Coil Energiser, Soft Start Controller, TPSR 12 mm, 100 mm 96mm 15 mm, 40 mm 100 x 96 x 40mm - DIN Rail - - - - - - -
RS Stock No. 169-4296
Mfr. Part No.ICKPGA 15X15
TWD98.00
Each
units
Universal Square Alu 38.1mm 37.92mm 16.51mm 38.1 x 37.92 x 16.51mm 9.2°C/W Adhesive Foil, Conductive Foil - Black - - Aluminium PGA -
RS Stock No. 674-4709
Mfr. Part No.SK400-37,5SA
TWD58.00
Each
units
- 37.5mm 33mm 10mm 37.5 x 33 x 10mm 11.5K/W - - Black - - - TO-3P -
RS Stock No. 184-6715
Mfr. Part No.SFH1901-10L
BrandSPREADFAST
TWD121.00
Each
units
Universal Square Alu 19mm 19mm 10mm 19 x 19 x 10mm - - - Black Suitable for Use with a Wide Range of Semi-Conductor Devices with Flat Surfaces - Aluminium - SFH
RS Stock No. 189-8634
Mfr. Part No.SK44-100-SA
TWD542.00
Each
units
Universal 19" Alu 100mm 159mm 15mm 100 x 159 x 15mm 1.8K/W Clamp - Black - - - - -
RS Stock No. 221-2110
Mfr. Part No.SK409-50,8STC
TWD100.00
Each
units
- 50.8mm 45mm 12.7mm 50.8 x 45 x 12.7mm 6.2K/W Clip - Black - - - - -
RS Stock No. 560-228
Mfr. Part No.HAF-10L
BrandTDK-Lambda
TWD479.00
Each
units
PFE, 1/1 Brick AC/DC Converter 116.8mm 61mm 25.4mm 116.8 x 61 x 25.4mm 2.2K/W Screw - Black - - - - -
RS Stock No. 692-0641
Mfr. Part No.LA 9 200 24 V
TWD6,395.00
Each
units
Universal Rectangular Alu with fan 200mm 80mm 83mm 200 x 80 x 83mm 0.15K/W - - - - - Aluminium - -
RS Stock No. 189-9132
Mfr. Part No.FK231SA220
TWD39.00
Each
units
- 19mm 13.5mm 9.5mm 19 x 13.5 x 9.5mm 24K/W Screw - Black - - - TO-220 -
RS Stock No. 490-7292
Mfr. Part No.S586/B/125
TWD730.00
Each
units
Universal Rectangular Alu 125mm 200mm 25mm 125 x 200 x 25mm 0.72K/W - - Black - - Aluminium - -
RS Stock No. 189-8842
Mfr. Part No.SK04-37,5-SA
TWD133.00
Each
units
- 37.5mm 97mm 25mm 37.5 x 97 x 25mm 2.7K/W - - Black - - - - -