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. 722-6820
Mfr. Part No.SK 572/25 SA
SGD17.25
Each
units
Universal Round Alu - - 25mm 85 (Dia.) x 25mm 2.6K/W Screw 85mm Black - - - LED -
RS Stock No. 184-6729
Mfr. Part No.HS-DC-1/8-HFL-9
BrandSPREADFAST
SGD4.57
Each
units
1/8 Brick DC/DC Converter 62mm 25mm 10mm 62 x 25 x 10mm - - - Black DC-DC Converters - Aluminium - HS
RS Stock No. 400-056
Mfr. Part No.193AB1500B
SGD76.22
Each
units
Universal Rectangular Alu 150mm 240mm 46mm 150 x 240 x 46mm 0.4K/W - - Black - - - - -
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. 169-4319
Mfr. Part No.ICKPGA 17X17
SGD4.84
Each
units
Universal Square Alu 43.1mm 43.1mm 16.51mm 43.1 x 43.1 x 16.51mm 8.6K/W Adhesive Foil, Conductive Foil - Black - - - PGA -
RS Stock No. 712-4156
Mfr. Part No.241402B92200G
SGD10.06
Each
units
1/4 Brick DC/DC Converter 37mm 37mm 6mm 58 x 37 x 6mm - Screw - - - - - - -
RS Stock No. 234-2378
Mfr. Part No.PPD0500P
SGD3.03
Each
units
- 50mm 35mm 25mm 50 x 35 x 25mm 5.5K/W Clip - Black - - - - -
RS Stock No. 712-4172
Mfr. Part No.241804B91200G
SGD4.37
Each
units
1/8 Brick DC/DC Converter 57.9mm 22.9mm 11.4mm 57.9 x 22.9 x 11.4mm - Screw - - - - - - -
RS Stock No. 123-5634
Mfr. Part No.SF-CHS-272710-PC
BrandSPREADFAST
SGD2.41
Each (In a Pack of 5)
units
Universal Square Ceramic 27mm 27mm 10mm 27 x 27 x 10mm 15.6 °C/W @ 100 lfm, 7.2 °C/W @ 400 lfm Adhesive, Screw - White Chipset, Cooling, IC Cooling, LED, Metal Heat Sink Replacement, Power Modules - - - Ceramic Heat Spreader Circular Pin Fin
RS Stock No. 712-4364
Mfr. Part No.0SA36/150/B
SGD30.40
Each
units
- 150mm 49.5mm 85.5mm 150 x 49.5 x 85.5mm 0.93K/W Clip - Black - - - - -
RS Stock No. 722-6883
Mfr. Part No.SK 480/84 SA
SGD5.61
Each
units
- 84mm 28mm 10.3mm 84 x 28 x 10.3mm 8K/W Clip - Black - - - - -
RS Stock No. 489-6136
Mfr. Part No.MBH40002-12P/2.6
BrandMalico
SGD9.74
Each
units
Clip 40mm 40mm 12mm 40 x 40 x 12mm - Clip - Black - - - - -
RS Stock No. 880-5888
Mfr. Part No.413000U00609G
SGD4,460.238
Each (In a Pack of 5)
units
Universal rectangular Liquid 224mm 142mm 20.5mm 224 x 142 x 20.5mm - Surface Mount - - Power Applications - Aluminium - 4130
RS Stock No. 265-260
Mfr. Part No.35F159L70
BrandLSI
SGD42.10
Each
units
- 159mm 70mm 35mm 159 x 70 x 35mm - - - - - - - - -
RS Stock No. 880-5585
Mfr. Part No.581001B02500
SGD8,858.37
1 Pack of 5000
Pack(s)
- 16.2mm 16.26mm 25.4mm - 19.6°C/W - - - Through Hole Discrete Semiconductors Black Anodized Aluminium TO-218, TO-220 -
RS Stock No. 893-5370
Mfr. Part No.C126-040-2AE
BrandOhmite
SGD7.31
Each (In a Pack of 100)
units
- 40mm 19.6mm 32.5mm 40 x 19.6 x 32.5mm - Clip - Black - Black Anodized Aluminium TO-126 C
RS Stock No. 189-8965
Mfr. Part No.LAICK18X18F
SGD106.00
Each
units
Universal Square Alu with fan 46.9mm 20mm 46.48mm 46.9 x 20 x 46.48mm 1.5K/W Conductive Foil - Black - - - - -
RS Stock No. 497-8957
Mfr. Part No.6W-1RS
SGD24.39
Each
units
Universal Rectangular Alu 152mm 130mm 32mm 152 x 130 x 32mm 1.1K/W - - Black - - - - -
RS Stock No. 712-4282
Mfr. Part No.HF20
SGD5.96
Each (In a Pack of 5)
units
- 20mm 21mm 28mm 20 x 21 x 28mm 13.1°C/W Clip - Black - - - TO-220 -
RS Stock No. 504-0621
Mfr. Part No.FK224SA220-1
SGD1.25
Each (In a Pack of 10)
units
- 25mm 25.4mm 8.3mm 25 x 25.4 x 8.3mm 18K/W Clip - Black - - - TO-220 -
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