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. 698-8117
Mfr. Part No.FK 244 13 D PAK
SGD1.22
Each (In a Pack of 5)
units
- 23mm 13mm 10mm 23 x 13 x 10mm 25K/W Solder - Silver - - - - -
RS Stock No. 903-3080
Mfr. Part No.109AB1500B
SGD24.66
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 - 100
RS Stock No. 507-4905
Mfr. Part No.EM/B/75
SGD41.44
Each
units
Universal Rectangular Alu 75mm 200mm 40mm 75 x 200 x 40mm 0.8K/W - - Black - - Aluminium - -
RS Stock No. 189-8476
Mfr. Part No.SK64-75-SA-2M3
SGD13.07
Each
units
- 75mm 70mm 25mm 75 x 70 x 25mm 2.7K/W Screw - Black - - - - -
RS Stock No. 401-548
Mfr. Part No.400088
SGD0.967
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. 168-6217
Mfr. Part No.KL105.29SW
BrandSeifert
SGD2.25
Each
units
- 27mm 16mm 33mm 27 x 16 x 33mm 19K/W Solder - Black - - - TO-220 -
RS Stock No. 268-082
Mfr. Part No.437683
SGD1.562
Each (In a Pack of 5)
units
- 19.5mm 12.7mm 13mm 19.5 x 12.7 x 13mm 25°C/W Solder - Black - - - TO-220, TO-262 -
RS Stock No. 692-0638
Mfr. Part No.LA 9 150 230 V
SGD247.60
Each
units
Universal Rectangular Alu with fan 150mm 80mm 83mm 150 x 80 x 83mm 0.25K/W - - - - - Aluminium - -
RS Stock No. 750-0908
Mfr. Part No.BGA STD 050
SGD22.16
1 Bag of 5
Bag(s)
BGA 20mm 20mm 19.1mm 20 x 20 x 19.1mm 14K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 920-9420
Mfr. Part No.ILA-HSINK-RADL-100X65MM-BLK
SGD58.18
Each
units
SCOB - - 65mm 100 (Dia.) x 65mm - - 100mm - - - - LED -
RS Stock No. 920-9423
Mfr. Part No.ILA-HSINK-RADL-100X80MM-BLK
SGD68.05
Each
units
SCOB - - 80mm 100 (Dia.) x 80mm - - 100mm - - - - LED -
RS Stock No. 189-8814
Mfr. Part No.SK03-50-SA
SGD7.05
Each
units
- 50mm 120mm 32mm 50 x 120 x 32mm 2.5K/W Screw - Black - - - - -
RS Stock No. 403-178
Mfr. Part No.437868
SGD3.633
Each (In a Pack of 10)
units
- 12.5mm 34.5mm 38mm 12.5 x 34.5 x 38mm 10.2K/W Solder - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 920-9439
Mfr. Part No.ILA-HSINK-RADL-70X20MM-BLK
SGD30.77
Each
units
SCOB - - 20mm 70 (Dia.) x 20mm - - 70mm - - - - LED -
RS Stock No. 692-0616
Mfr. Part No.LA 9 100 24 V
SGD222.74
Each
units
Universal Rectangular Alu with fan 100mm 80mm 83mm 100 x 80 x 83mm 0.22K/W - - - - - Aluminium - -
RS Stock No. 674-4835
Mfr. Part No.ICK S 40x40x20
SGD18.69
Each
units
Universal Square Alu 40mm 40mm 20mm 40 x 40 x 20mm 3.5K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 920-9433
Mfr. Part No.ILA-HSINK-RADL-70X70MM-BLK
SGD58.18
Each
units
SCOB - - 70mm 70 (Dia.) x 70mm - - 70mm - - - - LED -
RS Stock No. 189-8684
Mfr. Part No.SK47-100-SA
SGD31.78
Each
units
Universal Rectangular Alu 100mm 200mm 40mm 100 x 200 x 40mm 0.7K/W - - Black - - Aluminium - -
RS Stock No. 189-8094
Mfr. Part No.SK104-25,4-STS-22
SGD3.62
Each
units
TO-220 25.4mm 34.9mm 12.7mm 25.4 x 34.9 x 12.7mm 14K/W Clip - Black - - - TO-220 -
RS Stock No. 712-4248
Mfr. Part No.PF435G
SGD0.672
Each (In a Pack of 5)
units
- 13mm 12.7mm 19.5mm 13 x 12.7 x 19.5mm 20.3°C/W Solder - Black - - - TO-220, TO-262 -