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. 234-2485
Mfr. Part No.510AB0500MB
SGD7.06
Each
units
Universal Rectangular Alu 50mm 65mm 20mm 50 x 65 x 20mm 3.3K/W - - Black - - - - -
RS Stock No. 218-2081
Mfr. Part No.RAWA410-0
BrandSchaffner
SGD65.22
Each
units
Universal Rectangular Alu 1m 47.5mm 19mm - - - - Black - - - - -
RS Stock No. 712-4396
Mfr. Part No.0S565/50/B
SGD7.63
Each
units
- 50mm 15mm 54mm 50 x 15 x 54mm 7.37K/W Clip - Black - - - - -
RS Stock No. 489-6170
Mfr. Part No.MBH45001-15W/2.6
BrandMalico
SGD10.82
Each
units
Clip 45mm 45mm 15mm 45 x 45 x 15mm - Clip - Black - - - - -
RS Stock No. 780-5956
Mfr. Part No.ILA-HSINK-70X70X55MM-BLU-K
SGD42.61
Each
units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 16, Oslon 4, Oslon 9, Stanley 1, Stanley 4 70mm 70mm 55mm 70 x 70 x 55mm - Screw - Blue - - - LED -
RS Stock No. 674-4775
Mfr. Part No.ICK LED R 45,7x16,5
SGD7.64
Each
units
Universal Round Alu - - 16.51mm 45.7 (Dia.) x 16.51mm 10.46K/W Adhesive Foil, Conductive Foil 45.7mm Black - - - LED -
RS Stock No. 184-6715
Mfr. Part No.SFH1901-10L
BrandSPREADFAST
SGD5.58
Each
units
Universal Square Alu 19mm 19mm 10mm 19 x 19 x 10mm - - - Black Suitable for Use with a Wide Range of Semi-Conductor Devices with Flat Surfaces - Aluminium - SFH
RS Stock No. 674-4728
Mfr. Part No.SK470-100SA
SGD1.65
Each
units
- 100mm 11.8mm 8mm 100 x 11.8 x 8mm 18.5K/W - - Black - - - - -
RS Stock No. 780-5978
Mfr. Part No.ILA-HSINK-78X46X25MM-SVR-K
SGD19.62
Each
units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 16, Oslon 4, Oslon 9, Stanley 1, Stanley 4 78mm 46mm 25mm 78 x 46 x 25mm - Screw - Silver - - - LED -
RS Stock No. 402-383
Mfr. Part No.P3/180A (CMT)
BrandSemikron
SGD118.80
Each
units
SEMIPACK, SEMIPONT, SEMITRANS 180mm 125mm 135mm 180 x 125 x 135mm 0.48K/W - - Black - - - - -
RS Stock No. 189-8640
Mfr. Part No.SK44-150-SA
SGD13.62
Each
units
Universal 19" Alu 150mm 159mm 15mm 150 x 159 x 15mm 1.4K/W Clamp - Black - - - - -
RS Stock No. 867-0907
Mfr. Part No.SF-03-250-S
BrandSPREADFAST
SGD10.76
Each
units
Heat Pipe 250mm - - 3 x 250mm - - 3mm - - - Copper - SF
RS Stock No. 692-0660
Mfr. Part No.LA 7 100 24 V
SGD185.27
Each
units
Universal Rectangular Alu with fan 100mm 125mm 74mm 100 x 125 x 74mm 0.12K/W - - - - - - - -
RS Stock No. 722-6852
Mfr. Part No.SK 575/25 SA
SGD2.41
Each
units
- 25mm 6mm 50mm 25 x 6 x 50mm 10K/W Clip - Black - - - - -
RS Stock No. 189-8151
Mfr. Part No.SK129-50,8-STS-220
SGD3.67
Each
units
- 50.8mm 42mm 25mm 50.8 x 42 x 25mm 4K/W Clip - Black - - - - -
RS Stock No. 712-4285
Mfr. Part No.PF758G
SGD1.572
Each (In a Pack of 5)
units
- 11mm 22mm 24mm 11 x 22 x 24mm 20.3°C/W PCB Through Hole - - - - - TO-220 -
RS Stock No. 712-4311
Mfr. Part No.551002B00000G
SGD0.90
Each (In a Pack of 5)
units
- 36.83mm 25.55mm 19.99mm 36.83 x 2.55 x 19.99mm 12.4°C/W - - Black - Black Anodized - TO-220 -
RS Stock No. 780-5916
Mfr. Part No.ILA-HSINK-STAR-50X40MM-RED-K
SGD27.13
Each
units
Dragon 1, Duris 1, Duris 4, Oslon 1, Oslon 4, Stanley 1, Stanley 4 - - 40mm 50 (Dia.) x 40mm - Screw 50mm Red - - - LED -
RS Stock No. 774-2770
Mfr. Part No.LAM 3 100 12
SGD43.82
Each
units
Universal Rectangular Alu with fan 100mm 30mm 30mm 100 x 30 x 30mm 1K/W PCB Mount - Natural - - - - -
RS Stock No. 168-6245
Mfr. Part No.KL167SW
BrandSeifert
SGD1.98
Each
units
- 30mm 25.4mm 12.7mm 30 x 25.4 x 12.7mm 15K/W Solder - Black - - - TO-220 -
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