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. 750-0914
Mfr. Part No.BGA STD 065
TWD335.00
1 Bag of 5
Bag(s)
- 27.8mm 27.8mm 11.2mm 27.8 x 27.8 x 11.2mm 12.2K/W Adhesive Foil - Black - - - BGA -
RS Stock No. 176-4172
BrandRS PRO
TWD25.00
Each (In a Pack of 5)
units
- 25.4mm 41.9mm 38.1mm 25.4 x 41.9 x 38.1mm 3.3 (Forced) °C/W, 6.3 (Natural) °C/W Vertical - Black - Black Anodized Aluminium TO-218, TO-220, TO-247 RSAW294
RS Stock No. 402-513
Mfr. Part No.DIP1490
TWD195.40
Each (In a Pack of 10)
units
- 31.9mm 10.5mm 7.3mm 31.9 x 10.5 x 7.3mm 24K/W Clip - Black - - - - -
RS Stock No. 867-0935
Mfr. Part No.SF-06-300-S
BrandSPREADFAST
TWD317.00
Each
units
Heat Pipe 300mm - - 6 x 300mm - - 6mm - - - Copper - SF
RS Stock No. 234-2564
Mfr. Part No.LS300
TWD34.00
Each
units
- 36.9mm 44mm 10mm 36.9 x 44 x 10mm 12°C/W Clip, Screw - Black - - - TO-220 -
RS Stock No. 489-6108
Mfr. Part No.MBH35002-12P/2.6
BrandMalico
TWD305.00
Each
units
Clip 35mm 35mm 12mm 35 x 35 x 12mm - Clip - Black - - - - -
RS Stock No. 712-4386
Mfr. Part No.0S517/150/B
TWD615.00
Each
units
- 150mm 40mm 75mm 150 x 40 x 75mm 1.55K/W Clip - Black - - - - -
RS Stock No. 867-0913
Mfr. Part No.SF-04-200-S
BrandSPREADFAST
TWD261.00
Each
units
Heat Pipe 200mm - - 4 x 200mm - - 4mm - - - Copper - SF
RS Stock No. 903-3150
Mfr. Part No.113AB1000B
TWD719.00
Each
units
Universal Rectangular Alu 100mm 150mm 25mm 100 x 150 x 25mm 0.54°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - 100
RS Stock No. 698-8114
Mfr. Part No.FK 244 08 D3 PAK
TWD54.60
Each (In a Pack of 5)
units
- 31mm 18mm 10mm 31 x 8 x 10mm 26K/W Solder - Silver - - - - -
RS Stock No. 674-4719
Mfr. Part No.SK454-75SA
TWD93.00
Each
units
- 75mm 21.45mm 19mm 75 x 21.45 x 19mm 7K/W - - Black - - - - -
RS Stock No. 722-6811
Mfr. Part No.SK 569/50 SA
TWD342.00
Each
units
Universal Round Alu - - 50mm 60 (Dia.) x 50mm 1.5K/W Screw 60mm Black - - - LED -
RS Stock No. 184-6746
Mfr. Part No.SFPLAS-65x62-11L
BrandSPREADFAST
TWD134.00
Each
units
Universal Rectangular Plastic 65.1mm 62mm 11.2mm 65.1 x 62 x 11.2mm - - - Black - - Plastic - -
RS Stock No. 903-3172
Mfr. Part No.132AB1000B
TWD1,301.00
Each
units
Universal Rectangular Alu 100mm 250mm 30mm 100 x 250 x 30mm 0.24°C/W PCB Mount - - High Power Semiconductor Device, Optoelectronic Device Anodized Aluminium - 100
RS Stock No. 712-4279
Mfr. Part No.6396BG
TWD57.60
Each (In a Pack of 5)
units
- 25.4mm 41.91mm 25.4mm 25.4 x 41.91 x 25.4mm 5.6°C/W - - Black - - - TO-218, TO-220, TO-247 -
RS Stock No. 774-2789
Mfr. Part No.LAM 3 100 05
TWD2,086.00
Each
units
Universal Rectangular Alu with fan 100mm 30mm 30mm 100 x 30 x 30mm 1.2K/W PCB Mount - Natural - - Aluminium - -
RS Stock No. 189-8965
Mfr. Part No.LAICK18X18F
TWD2,438.00
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 - - Aluminium - -
RS Stock No. 221-2097
Mfr. Part No.SK409-25,4STC
TWD80.00
Each
units
- 25.4mm 45mm 12.7mm 25.4 x 45 x 12.7mm 8.2K/W Clip - Black - - - - -
RS Stock No. 169-4268
Mfr. Part No.SK125 84SA
TWD110.00
Each
units
- 84mm 30mm 28mm 84 x 30 x 28mm 8.1K/W - - Black - - - TO-220 -
RS Stock No. 123-5640
Mfr. Part No.SF-CHS-606015-PC
BrandSPREADFAST
TWD229.00
Each
units
Universal Square Ceramic 60mm 60mm 15mm 60 x 60 x 15mm 2.6 °C/W @ 400 lfm, 4.7 °C/W @ 100 lfm Adhesive, Screw - White Chipset, Cooling, IC Cooling, LED, Metal Heat Sink Replacement, Power Modules - - - Ceramic Heat Spreader Circular Pin Fin