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. 722-6928
Mfr. Part No.SK 487/84 SA
SGD10.19
Each
units
- 84mm 52.3mm 28mm 84 x 52.3 x 28mm 2.5K/W Clip - Black - - - - -
RS Stock No. 674-4771
Mfr. Part No.ICK LED R 40x27
SGD11.86
Each
units
Universal Round Alu - - 27mm 40 (Dia.) x 27mm 9.41K/W Adhesive Foil, Conductive Foil 40mm Black - - - LED -
RS Stock No. 189-8549
Mfr. Part No.SK08-37,5-SA
SGD8.03
Each
units
- 37.5mm 88mm 35mm 37.5 x 88 x 35mm 2.5K/W - - Black - - - - -
RS Stock No. 189-8511
Mfr. Part No.SK68-50-SA
SGD6.42
Each
units
- 50mm 46mm 33mm 50 x 46 x 33mm 4.8K/W Screw - Black - - - TO-220 -
RS Stock No. 123-5620
Mfr. Part No.SF-CHS-434306P
BrandSPREADFAST
SGD3.74
Each
units
Universal Square Ceramic 43mm 43mm 6mm 43 x 43 x 6mm 13.2 °C/W @ 400 lfm, 22.4 °C/W @ 100 lfm Adhesive, Screw - White Chipset, Cooling, IC Cooling, LED, Metal Heat Sink Replacement, Power Modules - - - Ceramic Heat Spreader Pin Fin
RS Stock No. 774-2789
Mfr. Part No.LAM 3 100 05
SGD90.75
Each
units
Universal Rectangular Alu with fan 100mm 30mm 30mm 100 x 30 x 30mm 1.2K/W PCB Mount - Natural - - - - -
RS Stock No. 169-9825
Mfr. Part No.WA116 6
BrandSeifert
SGD4.49
Each
units
- 37.5mm 34.2mm 15mm 37.5 x 36 x 15mm 6K/W - - Black - - - - -
RS Stock No. 189-8870
Mfr. Part No.SK08-100-SA
SGD13.91
Each
units
- 100mm 88mm 35mm 100 x 88 x 35mm 1.5K/W - - Black - - - - -
RS Stock No. 712-4399
Mfr. Part No.0S579/100/B
SGD7.74
Each
units
- 100mm 27mm 60mm 100 x 27 x 60mm 3.1K/W Clip - Black - - - - -
RS Stock No. 674-4712
Mfr. Part No.SK454-100SA
SGD2.62
Each
units
- 100mm 21.45mm 19mm 100 x 21.45 x 19mm 6K/W - - Black - - - - -
RS Stock No. 712-4194
Mfr. Part No.576802B00000G
SGD1.12
Each (In a Pack of 5)
units
- 19.05mm 14.48mm 12.7mm 12.7 x 14.48 x 19.05mm 27.3°C/W Clip - Black - Black Anodized - TO-220, TO-262 -
RS Stock No. 168-8061
Mfr. Part No.WA204B
BrandSeifert
SGD70.07
Each
units
Universal Rectangular Alu 1m 79mm 15mm - - - - - - - - - -
RS Stock No. 189-8757
Mfr. Part No.SK01-75-SA
SGD7.92
Each
units
- 75mm 115mm 26mm 75 x 115 x 26mm 2.5K/W Screw - Black - - - - -
RS Stock No. 712-4239
Mfr. Part No.7141DG
SGD1.54
Each (In a Pack of 5)
units
- 13.08mm 13.21mm 19.81mm 13.08 x 13.21 x 19.81mm 20.3°C/W PCB Through Hole - - - - - TO-220 -
RS Stock No. 774-2776
Mfr. Part No.LAM 3 75 05
SGD88.33
Each
units
Universal Rectangular Alu with fan 75mm 30mm 30mm 75 x 30 x 30mm 1.18K/W PCB Mount - Natural - - - - -
RS Stock No. 189-8482
Mfr. Part No.SK68-100-SA
SGD11.41
Each
units
- 100mm 46mm 33mm 100 x 46 x 33mm 3K/W Screw - Black - - - TO-220 -
RS Stock No. 234-2542
Mfr. Part No.520AB1000MB
SGD16.55
Each
units
Universal Rectangular Alu 100mm 88mm 35mm 100 x 88 x 35mm 1.4K/W - - Black - - - - -
New
RS Stock No. 225-846
Mfr. Part No.PR1646-30-PB-SN
SGD4.01
Each
units
DIP 46.2mm 16mm 30mm 46.2 x 16 x 30mm 9.1K/W PCB Through Hole - Black - - - - -
RS Stock No. 184-6736
Mfr. Part No.HS-DC-1/2-LFL-17
BrandSPREADFAST
SGD8.43
Each
units
1/2 Brick DC/DC Converter 62mm 60mm 20mm 62 x 60 x 20mm - - - Black DC-DC Converters - Aluminium - HS
RS Stock No. 780-5919
Mfr. Part No.ILA-HSINK-STAR-50X40MM-BLK-K
SGD31.29
Each
units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 4, Stanley 1, Stanley 4 - - 40mm 50 (Dia.) x 40mm - Screw 50mm Black - - - LED -
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