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. 893-4939
Mfr. Part No.RA-T2X-51E
BrandOhmite
€2.737
Each (In a Pack of 10)
units
TBH25, TCH35, TEH100, TEH70 42mm 25mm 50.8mm 42 x 25 x 50.8mm 3.5°C/W Vertical - Black - Black Anodized Aluminium TO-218, TO-220, TO-247 R
RS Stock No. 893-4942
Mfr. Part No.FA-T220-64E
BrandOhmite
€2.594
Each (In a Pack of 10)
units
TBH25, TCH35, TEH100, TEH70 41.6mm 25mm 63.5mm 41.6 x 25 x 63.5mm 3°C/W Vertical - Black - Black Anodized Aluminium TO-218, TO-220, TO-247 F
RS Stock No. 893-4926
Mfr. Part No.WV-DT2-101E
BrandOhmite
€2.981
Each (In a Pack of 100)
units
TBH25, TCH35, TEH100, TEH70 43.4mm 18.3 (TO-220) mm, 23.4 (TO-247) mm 30.5 (TO-220) mm, 32 (TO-247) mm 43.4 x 18.3 x 30.5 (TO-220) mm, 43.4 x 23.4 x 32 (TO-247) mm 8°C/W Vertical - - - - Aluminium - W
RS Stock No. 893-5471
Mfr. Part No.DV-T263-201E
BrandOhmite
€1.574
Each (In a Pack of 100)
units
- 25.9mm 12.7mm 12.1mm 25.9 x 12.7 x 12.1mm - Roller Mount - - - - Aluminium - D
RS Stock No. 893-4945
Mfr. Part No.FA-T220-38E
BrandOhmite
€1.529
Each (In a Pack of 10)
units
TBH25, TCH35, TEH100, TEH70 41.6mm 25mm 38.1mm 41.6 x 25 x 38.1mm 3.8°C/W Vertical - Black - Black Anodized Aluminium TO-218, TO-220, TO-247 F
RS Stock No. 893-4932
Mfr. Part No.RA-T2X-64E
BrandOhmite
€3.61
Each
units
TBH25, TCH35, TEH100, TEH70 42mm 25mm 63.5mm 42 x 25 x 63.5mm 3.1°C/W Vertical - Black - Black Anodized Aluminium - R
RS Stock No. 893-5361
Mfr. Part No.C126-040-2VE
BrandOhmite
€4.324
Each (In a Pack of 100)
units
- 40mm 19.6mm 32.5mm 40 x 19.6 x 32.5mm - Clip - - - - Aluminium TO-126 C
RS Stock No. 893-4320
Mfr. Part No.MV-102-55E
BrandOhmite
€7.27
Each
units
- 55mm 34.3mm 38.6mm 55 x 34.3 x 38.6mm 6°C/W Clip - - - - Aluminium - M
RS Stock No. 893-5531
Mfr. Part No.SV-LED-314E
BrandOhmite
€2.456
Each (In a Pack of 100)
units
- - - 14mm 21.1 x 14mm 9°C/W - 21.1mm - - - - LED SV
RS Stock No. 893-4923
Mfr. Part No.WA-DT2-101E
BrandOhmite
€4.322
Each (In a Pack of 100)
units
TBH25, TCH35 43.4mm 18.3 (TO-220) mm, 23.4 (TO-247) mm 30.5 (TO-220) mm, 32 (TO-247) mm 43.4 x 18.3 x 30.5 (TO-220) mm, 43.4 x 23.4 x 32 (TO-247) mm 7°C/W Vertical - Black - Black Anodized Aluminium TO-220 W
RS Stock No. 893-5370
Mfr. Part No.C126-040-2AE
BrandOhmite
€4.448
Each (In a Pack of 100)
units
- 40mm 19.6mm 32.5mm 40 x 19.6 x 32.5mm - Clip - Black - Black Anodized Aluminium TO-126 C
RS Stock No. 893-3535
Mfr. Part No.WV-T247-101E
BrandOhmite
€2.204
Each (In a Pack of 10)
units
TEH100, TEH70 43.4mm 23.4mm 32mm 43.4 x 23.4 x 32mm 12°C/W Vertical - - - - Aluminium TO-247 W
RS Stock No. 893-3532
Mfr. Part No.WV-T220-101E
BrandOhmite
€1.853
Each (In a Pack of 10)
units
TBH25, TCH35 43.4mm 18.3mm 30.5mm 43.4 x 18.3 x 30.5mm 13°C/W Vertical - - - - Aluminium TO-220 W
RS Stock No. 893-5478
Mfr. Part No.DA-T268-301E
BrandOhmite
€2.608
Each (In a Pack of 100)
units
- 40.2mm 12.7mm 11.6mm 40.2 x 12.7 x 11.6mm - Roller Mount - - - Black Anodized Aluminium - D
RS Stock No. 892-6474
Mfr. Part No.WA-T220-101E
BrandOhmite
€1.918
Each (In a Pack of 10)
units
TBH25, TCH35 43.4mm 18.3mm 30.5mm 43.4 x 18.3 x 30.5mm 12°C/W Vertical - Black - Black Anodized Aluminium TO-220 W
RS Stock No. 893-4324
Mfr. Part No.MA-102-55E
BrandOhmite
€6.533
Each (In a Pack of 100)
units
- 55mm 34.3mm 38.6mm 55 x 34.3 x 38.6mm 5.2°C/W Clip - Black - Black Anodized Aluminium - M
RS Stock No. 893-4948
Mfr. Part No.FA-T220-51E
BrandOhmite
€1.816
Each (In a Pack of 10)
units
TBH25, TCH35, TEH100, TEH70 41.6mm 25mm 50.8mm 41.6 x 25 x 50.8mm 3.4°C/W Vertical - Black - Black Anodized Aluminium TO-218, TO-220, TO-247 F
RS Stock No. 893-4419
Mfr. Part No.MA-302-55E
BrandOhmite
€9.60
Each
units
- 55mm 55.9mm 43.5mm 55 x 55.9 x 43.5mm 3°C/W Clip - Black - Black Anodized Aluminium - M
RS Stock No. 893-5480
Mfr. Part No.DV-T268-301E
BrandOhmite
€2.164
Each (In a Pack of 100)
units
- 40.2mm 12.7mm 11.6mm 40.2 x 12.7 x 11.6mm - Roller Mount - - - - Aluminium - D
RS Stock No. 892-6492
Mfr. Part No.DV-T268-101E
BrandOhmite
€1.911
Each (In a Pack of 20)
units
- 31mm 12.7mm 10.16mm 31 x 12.7 x 10.16mm - Roller Mount - - - - Aluminium - D