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. 189-8274
Mfr. Part No.SK92-100-SA
TWD400.00
Each
units
Universal Square Alu 100mm 100mm 40mm 100 x 100 x 40mm 1K/W - - Black - - - - -
RS Stock No. 300-2891
Mfr. Part No.KL 195/50.8/SWI
BrandSeifert
TWD176.00
Each
units
- 42mm 25.4mm 50.8mm 42 x 25.4 x 50.8mm 4.2K/W Solder - Black - - - - -
RS Stock No. 189-8268
Mfr. Part No.SK89-75-SA
TWD484.00
Each
units
- 75mm 80mm 78.6mm 75 x 80 x 78.6mm 1.3K/W - - Black - - - - -
RS Stock No. 867-9039
Mfr. Part No.RPI-COOLINGKIT.9
TWD181.00
Each
units
Banana Pi BPI-M1, Banana Pi BPI-M1+, Banana Pi BPI-M2 Berry, Banana Pi BPI-M2+, Raspberry Pi® 2 B, Raspberry Pi® 3 A+, Raspberry Pi® 3 B, Raspberry Pi® 3 B+, Raspberry Pi® 4 B, Raspberry Pi® A, Raspberry Pi® A+, Raspberry Pi® B, Raspberry Pi® B+ 8.5 mm, 19 mm 6.35 mm, 19 mm 5mm - - - - Black - - - - -
RS Stock No. 722-6915
Mfr. Part No.SK 487/37,5 SA
TWD136.00
Each
units
TO-220, TO-247 37.5mm 52.3mm 28mm 37.5 x 52.3 x 28mm 5K/W Clip - Black - - - - -
RS Stock No. 123-5622
Mfr. Part No.SF-CHS-202003F
BrandSPREADFAST
TWD19.00
Each (In a Pack of 5)
units
Universal Square Ceramic 20mm 20mm 2.5mm 20 x 20 x 2.5mm 43 °C/W @ 400 lfm, 58.2 °C/W @ 100 lfm Adhesive, Screw - White Chipset, Cooling, IC Cooling, LED, Metal Heat Sink Replacement, Power Modules - - - Ceramic Heat Spreader Finned
RS Stock No. 123-5635
Mfr. Part No.SF-CHS-313110-PC
BrandSPREADFAST
TWD56.40
Each (In a Pack of 5)
units
Universal Square Ceramic 31mm 31mm 10mm 31 x 31 x 10mm 7.2 °C/W @ 400 lfm, 14.6 °C/W @ 100 lfm Adhesive, Screw - White Chipset, Cooling, IC Cooling, LED, Metal Heat Sink Replacement, Power Modules - - - Ceramic Heat Spreader Circular Pin Fin
RS Stock No. 674-4756
Mfr. Part No.ICK BGA 14x14x10
TWD24.00
Each
units
BGA 14mm 14mm 10mm 14 x 14 x 10mm 27.4K/W Adhesive Foil, Conductive Foil - Black - - - BGA -
RS Stock No. 893-5333
Mfr. Part No.WA-T264-101E
BrandOhmite
TWD83.70
Each (In a Pack of 10)
units
TFH85 43.4mm 23.4mm 32mm 43.4 x 23.4 x 32mm 11°C/W Vertical - Black - Black Anodized Aluminium TO-264 W
RS Stock No. 234-2334
Mfr. Part No.LS220
TWD58.00
Each
units
TO-218, TO-220 30.2mm 30mm 13mm 30.2 x 30 x 13mm 17°C/W Clip, Screw - Black - - - TO-218, TO-220 -
RS Stock No. 403-184
Mfr. Part No.437874
TWD34.70
Each (In a Pack of 10)
units
- 50mm 34.5mm 50mm 12.5 x 34.5 x 50mm 8.8K/W Solder - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 268-105
Mfr. Part No.400020
TWD39.00
Each (In a Pack of 5)
units
- 19mm 22mm 19mm 11 x 22 x 19mm 23°C/W PCB Through Hole - - - - - TO-220 -
RS Stock No. 221-2160
Mfr. Part No.SK75-50-TO220
TWD87.00
Each
units
- 50mm 32mm 14mm 50 x 32 x 14mm 8.5K/W Screw - Black - - - TO-220 -
RS Stock No. 234-2306
Mfr. Part No.LS160
TWD50.00
Each
units
- 30mm 30mm 13mm 30 x 30 x 13mm 14°C/W Clip, Screw - Black - - - - -
RS Stock No. 485-8875
Mfr. Part No.PF720
TWD7.40
Each (In a Pack of 10)
units
- 19.84mm 8.1mm 20mm 19.84 x 8.1 x 20mm 28.9°C/W PCB Through Hole - - - - - TO-220 -
RS Stock No. 221-2176
Mfr. Part No.SK76-37,5-TO220
TWD78.00
Each
units
- 37.5mm 32mm 20mm 37.5 x 32 x 20mm 8K/W Screw - Black - - - TO-220 -
RS Stock No. 259-8739
Mfr. Part No.SK89-75KLSSR1
TWD918.00
Each
units
- 75mm 80mm 78.6mm 75 x 80 x 78.6mm 1.3K/W DIN Rail - Black - Anodized Stainless Steel - -
RS Stock No. 698-8111
Mfr. Part No.FK 244 13 D2 PAK
TWD38.60
Each (In a Pack of 5)
units
- 26mm 13mm 10mm 26 x 13 x 10mm 22.8K/W Solder - Silver - - - - -
RS Stock No. 880-5787
Mfr. Part No.531102V02500G
TWD451,269.00
1 Pack of 10500
Pack(s)
- 12.7mm 34.92mm 38.1mm 34.92 x 12.7 x 38.1mm 10.4°C/W - - Black Through Hole Discrete Semiconductors - Aluminium TO-202, TO-220 3531
RS Stock No. 360-8809
Mfr. Part No.KL 112.25.A SW
BrandSchaffner
TWD78.00
Each
units
- 25mm 11mm 16mm 25 x 11 x 16mm 18K/W Screw - Black - - - TO-220 -