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庫存編號 169-6999
製造零件編號KL157 KOMBI SW
BrandSeifert
HK$14.92
單位
TO-3, TO-32, TO-66, TO-9 41.3mm 33mm 25.4mm 41.3 x 33 x 25.4mm 25.4K/W Clip - - - - - - -
RS庫存編號 169-6927
製造零件編號KL175 SW
BrandSeifert
HK$31.85
單位
TO-3 40mm 27mm 12.7mm 40 x 27 x 12.7mm 14K/W PCB Surface Mount - Black - - - - -
RS庫存編號 169-9831
製造零件編號WA400 8P
BrandSeifert
HK$10.73
單位
- 25mm 16mm 11mm 25 x 16 x 11mm 18K/W - - - - - - - -
RS庫存編號 169-6933
製造零件編號KL176 SW
BrandSeifert
HK$42.53
單位
TO-3 40mm 27mm 19.1mm 40 x 27 x 19.1mm 12K/W PCB Surface Mount - Black - - - - -
RS庫存編號 169-9897
製造零件編號WA502 8
BrandSeifert
HK$52.09
單位
TO-3 37.5mm 60mm 15mm 37.5 x 60 x 15mm 6K/W - - - - - - - -
RS庫存編號 168-6346
製造零件編號WA 203
BrandSeifert
HK$235.32
單位
- 1m 32mm 20mm - - - - Black - - - - -
RS庫存編號 168-8061
製造零件編號WA204B
BrandSeifert
HK$295.31
單位
- - 79mm 15mm - - - - - - - - - -
RS庫存編號 299-3336
製造零件編號KL 195/63.5/SW
BrandSeifert
HK$39.24
單位
T-66 42mm 25.4mm 63.5mm 42 x 25.4 x 63.5mm 3.6K/W Solder - Black - - - - -
RS庫存編號 168-6289
製造零件編號WA 470
BrandSeifert
HK$423.91
單位
- - - - - - - - Black - - - - -
RS庫存編號 169-9803
製造零件編號WA201 5
BrandSeifert
HK$92.56
單位
TO-3, TO-66 75mm 100mm 28mm 75 x 100 x 28mm 2.5K/W - - Black - - - - -
RS庫存編號 169-9847
製造零件編號WA243 1
BrandSeifert
HK$579.15
單位
- 150mm - - - 0.3K/W - - - - - - - -
RS庫存編號 169-9780
製造零件編號WA208 14
BrandSeifert
HK$70.23
單位
TO-3 75mm 54mm 31.6mm 75 x 54 x 31.6mm 2.2K/W - - Black - - - - -
RS庫存編號 168-6302
製造零件編號WA 507
BrandSeifert
HK$530.12
單位
- 1m - 280mm - - - - Black - - - - -
RS庫存編號 168-6245
製造零件編號KL167SW
BrandSeifert
HK$12.22
單位
TO-220 30mm 25.4mm 12.7mm 30 x 25.4 x 12.7mm 15K/W Solder - Black - - - - -
RS庫存編號 180-5418
製造零件編號KK 633
BrandSeifert
HK$5.95
單位
TO-220 20.3mm 6.8mm 25.4mm 20.3 x 6.8 x 25.4mm 21K/W Clip - Black - - - - -
RS庫存編號 299-3320
製造零件編號KL 151-3
BrandSeifert
HK$29.59
單位
TO-3 64mm 64mm 25.4mm 46 x 46 x 25mm 6K/W - - Black - - - - -
RS庫存編號 300-2885
製造零件編號KL 195/38.1/SWI
BrandSeifert
HK$39.00
單位
T-66 42mm 25.4mm 38.1mm 42 x 25.4 x 38.1mm 5K/W Solder - Black - - - - -
RS庫存編號 168-6318
製造零件編號WA 408
BrandSeifert
HK$641.55
單位
- - - - - - - - Black - - - - -
RS庫存編號 168-6217
製造零件編號KL105.29SW
BrandSeifert
HK$9.00
單位
TO-220 27mm 16mm 33mm 27 x 16 x 33mm 19K/W Solder - Black - - - - -
RS庫存編號 168-6295
製造零件編號WA 502
BrandSeifert
HK$226.81
單位
- - - - - - - - Black - - - - -