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. 750-0888
Mfr. Part No.BGA STD 010
HK$58.81
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. 263-251
BrandRS PRO
HK$9.683
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. 722-6928
Mfr. Part No.SK 487/84 SA
HK$60.35
Each
units
- 84mm 52.3mm 28mm 84 x 52.3 x 28mm 2.5K/W Clip - Black - - - - -
RS Stock No. 189-8117
Mfr. Part No.SK104-50,8-STS-220
HK$21.83
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. 780-5925
Mfr. Part No.ILA-HSINK-STAR-50X40MM-SVR-K
HK$168.74
Each
units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 4, Stanley 1, Stanley 4 - - 40mm 50 (Dia.) x 40mm - Screw 50mm Silver - - - LED -
RS Stock No. 402-951
Mfr. Part No.TV4G
HK$25.499
Each (In a Pack of 20)
units
- 19mm 22mm 19mm 19 x 22 x 19mm 21°C/W Screw - Black - - - TO-126 -
RS Stock No. 674-4756
Mfr. Part No.ICK BGA 14x14x10
HK$11.63
Each
units
BGA 14mm 14mm 10mm 14 x 14 x 10mm 27.4K/W Adhesive Foil, Conductive Foil - Black - - - BGA -
RS Stock No. 867-9039
Mfr. Part No.RPI-COOLINGKIT.9
HK$44.56
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. 221-2182
Mfr. Part No.SK76-50-TO220
HK$19.77
Each
units
- 32mm 20mm 50mm 50 x 32 x 20mm 6K/W Screw - Black - Black Anodized - TO-220 -
RS Stock No. 722-6915
Mfr. Part No.SK 487/37,5 SA
HK$34.83
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. 234-2334
Mfr. Part No.LS220
HK$17.96
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. 268-105
Mfr. Part No.400020
HK$10.00
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. 485-8875
Mfr. Part No.PF720
HK$4.90
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. 189-9132
Mfr. Part No.FK231SA220
HK$8.11
Each
units
- 19mm 13.5mm 9.5mm 19 x 13.5 x 9.5mm 24K/W Screw - Black - - - TO-220 -
RS Stock No. 722-6903
Mfr. Part No.SK 574/84 SA
HK$43.59
Each
units
- 84mm 32.3mm 28mm 84 x 32.3 x 28mm 4K/W Clip - Black - - - - -
RS Stock No. 712-4260
Mfr. Part No.ML26AAG
HK$5.93
Each (In a Pack of 5)
units
- 25mm 15mm 20mm 25 x 15 x 20mm 17.9°C/W PCB Through Hole - Black - - - TO-220 -
RS Stock No. 401-964
Mfr. Part No.TV40G
HK$15.45
Each (In a Pack of 20)
units
- 38mm 28mm 22mm 38 x 28 x 22mm 9.9°C/W Screw - Black - - - TO-220 -
RS Stock No. 402-995
Mfr. Part No.1.25GY-50
HK$17.00
Each (In a Pack of 10)
units
TO-220 32mm 32mm 16mm 60 x 32 x 16mm 6.8°C/W Screw - Black - - - TO-220 -
RS Stock No. 268-082
Mfr. Part No.PF436G
HK$4.84
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. 722-6919
Mfr. Part No.SK 487/50 SA
HK$40.38
Each
units
- 50mm 52.3mm 28mm 50 x 52.3 x 28mm 4K/W Clip - Black - - - - -
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