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. 263-251
BrandRS PRO
SGD2.112
Each (In a Pack of 10)
units
TO-220 20mm 35mm 20mm 20 x 35 x 20mm 17.9°C/W - - - - - Aluminium TO-220 -
RS Stock No. 176-3936
BrandRS PRO
SGD2,502.33
1 Box of 4000
Box(es)
- 30mm 25.4mm 12.7mm 30 x 25.4 x 12.7mm 14 (Natural) °C/W, 7.3 (Forced) °C/W Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-3942
BrandRS PRO
SGD2.018
Each (In a Box of 500)
units
- 46.4mm 46.4mm 33.3mm 46.4 x 46.4 x 33.3mm 2 (Forced) °C/W, 2 (Natural) °C/W Bolt On, Horizontal, Vertical - Black - Black Anodized Aluminium TO-3 RSAW294
RS Stock No. 176-4165
BrandRS PRO
SGD0.461
Each (In a Pack of 10)
units
- 15.2mm 13.6mm 12.7mm 15.2 x 13.6 x 12.7mm 11 (Forced) °C/W, 29 (Natural) °C/W Bolt On, Horizontal, Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-3950
BrandRS PRO
SGD3,192.00
1 Box of 2000
Box(es)
- 38.1mm 34.9mm 12.7mm 38.1 x 34.9 x 12.7mm 5.5 (Forced)°C/W Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-3943
BrandRS PRO
SGD1,449.91
1 Box of 3000
Box(es)
- 15.2mm 13.6mm 12.7mm 15.2 x 13.6 x 12.7mm 11 (Forced) °C/W, 29 (Natural) °C/W Bolt On, Horizontal, Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-4185
BrandRS PRO
SGD2.121
Each (In a Pack of 10)
units
- 38.1mm 34.9mm 12.7mm 38.1 x 34.9 x 12.7mm 5.5 (Forced)°C/W Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-4150
BrandRS PRO
SGD0.689
Each (In a Pack of 10)
units
- 30mm 25.4mm 12.7mm 30 x 25.4 x 12.7mm 14 (Natural) °C/W, 7.3 (Forced) °C/W Vertical - Black - Black Anodized Aluminium TO-220 RSAW294
RS Stock No. 176-4162
BrandRS PRO
SGD2.516
Each (In a Pack of 5)
units
- 46.4mm 46.4mm 33.3mm 46.4 x 46.4 x 33.3mm 2 (Forced) °C/W, 2 (Natural) °C/W Bolt On, Horizontal, Vertical - Black - Black Anodized Aluminium TO-3 RSAW294
RS Stock No. 867-0947
Mfr. Part No.SF-08-200-S
BrandSPREADFAST
SGD21.14
Each
units
Heat Pipe 200mm - - 8 x 200mm - - 8mm - - - Copper - SF
RS Stock No. 750-0888
Mfr. Part No.BGA STD 010
SGD21.47
1 Bag of 5
Bag(s)
BGA 13mm 13.5mm 10mm 13 x 13.5 x 10mm 27K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 234-2362
Mfr. Part No.PPD0380P
SGD4.24
Each
units
- 38mm 35mm 25mm 38 x 35 x 25mm 7°C/W Clip - Black - - - - -
RS Stock No. 189-8599
Mfr. Part No.SK42-100-SA
SGD26.42
Each
units
Universal Rectangular Alu 100mm 200mm 25mm 100 x 200 x 25mm 0.95K/W - - Black - - Aluminium - -
RS Stock No. 264-686
Mfr. Part No.125AB2500B
SGD68.81
Each
units
Universal Rectangular Alu 250mm 200mm 25mm 250 x 200 x 25mm 0.58K/W - - Black - - Aluminium - -
RS Stock No. 467-551
Mfr. Part No.CMBA054949
BrandMalico
SGD26.02
Each
units
- 37.5mm 37.5mm 33mm 37.5 x 37.5 x 33mm 2.5K/W Screw - - - - - BGA -
RS Stock No. 674-4838
Mfr. Part No.ICK S 50x50x25
SGD24.56
Each
units
Universal Square Alu 50mm 50mm 25mm 50 x 50 x 25mm 2.4K/W Adhesive Foil, Conductive Foil - - - - Aluminium - -
RS Stock No. 903-3087
Mfr. Part No.109AB1000B
SGD19.32
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 - 100
RS Stock No. 271-858
Mfr. Part No.345AB0750B
SGD22.55
Each
units
Universal Rectangular Alu 75mm 120mm 37mm 75 x 120 x 37mm 1.2K/W - - Black - - Aluminium - -
RS Stock No. 490-7292
Mfr. Part No.S586/B/125
SGD37.11
Each
units
Universal Rectangular Alu 125mm 200mm 25mm 125 x 200 x 25mm 0.72K/W - - Black - - Aluminium - -
RS Stock No. 750-0951
Mfr. Part No.BGA STD 115
SGD4.01
Each
units
- 40mm 40mm 18mm 40 x 40 x 18mm 8.2K/W Adhesive Foil - Black - - - BGA -