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 doesnt 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. 774-2798
Mfr. Part No.LAM 3 K 75 05
HK$520.86
Each
units
- 75mm 30mm 30mm 75 x 30 x 30mm 1.18K/W PCB Mount - Natural - - - - -
RS Stock No. 169-4252
Mfr. Part No.SK92 150SA
HK$149.66
Each
units
Universal Rectangular Alu 150mm 100mm 40mm 150 x 100 x 40mm 1K/W - - Black - - - - -
RS Stock No. 507-5122
Mfr. Part No.OS461/B/150
HK$185.00
Each
units
Universal Rectangular Alu 150mm 100mm 40mm 150 x 100 x 40mm 0.86K/W - - Black - - - - -
RS Stock No. 189-9110
Mfr. Part No.FK225SAL1
HK$10.52
Each
units
- 38mm 24.5mm 27mm 38 x 24.5 x 27mm 9.9K/W Screw - Black - - - TO-220 -
RS Stock No. 234-2520
Mfr. Part No.520AB0750MB
HK$53.54
Each
units
Universal Rectangular Alu 75mm 88mm 35mm 75 x 88 x 35mm 1.65K/W - - Black - - - - -
RS Stock No. 722-6874
Mfr. Part No.SK 480/50 SA
HK$20.94
Each
units
- 50mm 28mm 10.3mm 50 x 28 x 10.3mm 10K/W Clip - Black - - - - -
RS Stock No. 403-190
Mfr. Part No.SW63-4
HK$19.828
Each (In a Pack of 10)
units
- 12.5mm 34.5mm 63mm 12.5 x 34.5 x 63mm 7K/W Solder - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 403-178
Mfr. Part No.SW38-4
HK$8.281
Each (In a Pack of 10)
units
- 12.5mm 34.5mm 38mm 12.5 x 34.5 x 38mm 10.2K/W Solder - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 401-548
Mfr. Part No.5FG
HK$5.237
Each (In a Pack of 50)
units
- 16mm 16mm 12.7mm 16 x 16 x 12.7mm 45.2K/W PCB Through Hole - Black - - - TO-220 -
RS Stock No. 672-1560
Mfr. Part No.WF151200
BrandCelduc
HK$156.27
Each
units
- 73.5mm 80mm 45mm 73.5 x 80 x 45mm 2.2K/W DIN Rail - - - - - SSR -
RS Stock No. 189-8218
Mfr. Part No.SK88-37.5-SA
HK$52.74
Each
units
- 37.5mm 100mm 50mm 37.5 x 100 x 50mm 1.75K/W - - Black - - - TO-3 -
RS Stock No. 189-8606
Mfr. Part No.SK42-150-SA
HK$185.91
Each
units
Universal Rectangular Alu 150mm 200mm 25mm 150 x 200 x 25mm 0.7K/W - - Black - - Aluminium - -
RS Stock No. 221-2160
Mfr. Part No.SK75-50-TO220
HK$22.30
Each
units
- 50mm 32mm 14mm 50 x 32 x 14mm 8.5K/W Screw - Black - - - TO-220 -
RS Stock No. 903-3087
Mfr. Part No.109AB1000B
HK$87.29
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. 189-8460
Mfr. Part No.SK64-37,5-SA-1M3
HK$51.48
Each
units
- 37.5mm 70mm 25mm 37.5 x 70 x 25mm 4.1K/W Screw - Black - - - - -
RS Stock No. 191-0374
Mfr. Part No.UK14-25-SA-220
HK$7.66
Each
units
- 25mm 14mm 15mm 25 x 14 x 15mm 20K/W Clip, Screw - Black - - - TO-220 -
RS Stock No. 189-8252
Mfr. Part No.SK89-100-SA
HK$160.50
Each
units
- 100mm 80mm 78.6mm 100 x 80 x 78.6mm 1K/W - - Black - - - - -
RS Stock No. 389-3451
Mfr. Part No.FHP08
HK$102.73
Each
units
- 61.8mm 50mm 32mm 61.8 x 50 x 32mm - - - - - - - - -
RS Stock No. 750-0908
Mfr. Part No.BGA STD 050
HK$75.85
1 Bag of 5
Bag(s)
BGA 20mm 20mm 19.1mm 20 x 20 x 19.1mm 14K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 403-162
Mfr. Part No.437856
HK$12.267
Each (In a Pack of 10)
units
- 25mm 12.5mm 25mm 12.5 x 34.5 x 25mm 11.4K/W Solder - Black - - - TO-218, TO-220, TO-247 -
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