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Heat sinks are passive cooling components that dissipate heat from electronic devices or systems that generate high heat loads, such as computers, servers and industrial equipment. Main heat sink components include a base and a series of fins made from high thermal conductivity materials like aluminum or copper. By carrying heat to the surrounding air, heat sinks ensure high thermal performance and prevent system failure or damage.
Heat sinks transfer heat away from a device or heat source and into the surrounding environment using conduction, convection and radiation. Generated heat is conducted through a high thermal conductivity heat sink base which conducts energy into heat sink fins. Additional surface area from the heat sinks fins increases heat transfer to the surrounding air with conduction. As air passes over these heat sink fins, it absorbs the heat from the heat sink and convects it away, either through natural convection or forced convection with a fan or blower.
While standalone heat sinks are suitable for many applications, heat sinks integrated with fans, heat pipes or liquid cooling systems boost cooling capacity, enable customized design, streamline installation and provide comprehensive thermal management for demanding applications. Eaton’s comprehensive thermal portfolio enables us to serve our customers with a best fit solution for their applications.
An extruded aluminum heat sink is one of the most popular and cost-efficient heat sink fabrication methods. Eaton produces a wide variety of extruded heat sink options that can be customized with various mounting methods, pre-applied thermal interface materials and other features to streamline assembly into your PCB.
Stamped heat sinks are a cost-effective solution that add surface area to increase heat transfer for board level products. These heat sinks are formed through progressive punching processes, where details and features are progressively added with each stamp of sheet metal going through the punching die. Stamped heat sinks are designed for specific electronic package types to ensure optimized fit and function. These heat sinks come in a variety of mounting methods, including solder tabs and pins, interference fit with the device through integrated clips or slide-on features or through-hole hardware like screws and nuts. Most stamped heat sinks are available with a finish to improve heat radiation and thermal performance for natural convection applications.
A complete thermal management solution requires not only the main method of heat transfer like a heat sink, but additional components for installation and optimal performance. Thermal accessories include items like hardware to mount the cooling solution and heat sources together, thermally conductive insulation and thermal interface materials.
Folded fin stock is manufactured in a progressive stamping process that folds sheet metals into fin stacks that increases surface area to improve cooling when used as heat transfer fins. Eaton varies heat transfer fin material, configuration, thickness and density to boost the performance of other thermal management technologies including heat exchangers, heat sinks and vacuum brazed cold plates. Our manufacturing flexibility and thermal innovation allows us to extend thermal performance of existing cooling technologies in an application, negating the need to transition to next level cooling technologies for increasing heat loads.
Eaton’s mounting kits are pre-packaged in heat-sealed plastic bags for easy use on an assembly line. Eaton offers kits for DO-4, DO-5, TO-220, TO-3 and TO-66 device packages. Mounting kits for DO-4 and DO-5 include an insulator, bushing, washer, lock washer and hex nut. For TO-220, TO-3 and TO-66 devices, kits include 1-2 screws, insulating material, bushing, washer, lock washer and hex nut.
Solder anchors are wire loops used to lock down heat sinks with spring clips, such as Z-Clips, to the printed circuit board (PCB). Solder anchors are soldered directly into the PCB and enable secure mounting for rugged applications and easy maintenance rework. When used in conjunction with Z-clips, solder anchors improve thermal contact between the heat sink and device, reduce thermal interface resistance and minimize keep-out areas.
Heat sink spring clips are an effective way to quickly mount electronic devices with TO package types to extruded heat sinks. Reduce interface resistance between the heat source and heat sink solution to improve thermal performance by utilizing Heat sink spring clips. Spring clips are designed to work in conjunction with an extruded profile’s geometry to ensure adequate mounting pressure on the device.
PCB card ejectors, pullers and snap-on hardware aid safe card insertion and extraction. PCB cards, their components and connectors are less frequently damaged during extraction from PC boards when using appropriate ejector, puller and extractor hardware. Single-piece snap-on PCB ejectors and pullers reduce assembly time and complexity and are excellent for retrofit applications.
Bushings, washers and spacers electrically insulate hardware such as screws, rivets or wires, reduce vibration and can be used as a guide for materials. Insulating bushings and washers offer mechanical benefits, electrical insulation and environmental protection such as noise, vibration and harshness (NVH) and shock. They increase device structural integrity, electrical performance and reliability.
Insulating shoulder washers bear similarities to bushings and vary in geometry and materials for NVH and protection as well as electrical and thermal insulation. Often constructed of aluminum alloys, they can also be made from a range of flexible or rigid materials to suit the application.
Part number |
Length (mm) |
Width (mm) |
Height (mm) |
Primary device types |
Materials |
RoHS |
| 6000DG | 6.35 | 25.4 | 25.4 | Axial Lead | Cu (Tin) | Compliant |
| 6021BG | 12.7 | 25.4 | 29.97 | TO-220* | Al | Compliant |
| 6043BG | 6.81 | 20.32 | 25.4 | TO-220* | Al | Compliant |
| 6238B-MTG | 15.49 | 25.53 | 29.44 | TO-220* | Al | Compliant |
| 7020B-MTG | 11.94 | 33.2 | 36.83 | TO-220* | Al | Compliant |
| 7023B-MTG | 24.13 | 48.26 | 49.53 | TO-220* | Al | Compliant |
| 7106DG | 14.99 | 25.91 | 9.52 | D2 pak (TO-263), SO-10 (MO-184) | Cu (Tin) | Compliant |
| 7109DG | 11.43 | 25.4 | 19.38 | D2 pak, TO-263 | Cu (Tin) | Compliant |
| 7136DG | 13.08 | 13.21 | 21.54 | TO-220* | Cu (Tin) | Compliant |
| 7141DG | 13.08 | 13.21 | 19.8 | TO-220* | Cu (Tin) | Compliant |
| 507302B00000G | 19.05 | 19.05 | 9.65 | TO-220 | Al | Compliant |
| 530614B00000G | 29.97 | 25.4 | 12.7 | TO-220* | Al | Compliant |
| 534202B02853G | 12.7 | 25.4 | 29.97 | TO-220* | Al | Compliant |
| 563002T00000G | 12.7 | 25.4 | 29.97 | TO-220** | Al (Paint) | Compliant |
| 566010B03400G | 12.7 | 25.4 | 30.99 | Multiwatt, SIP | Al | Compliant |
| 573100D00000G | 8 | 22.86 | 10.16 | D-Pak, TO-252 | Al (Tin) | Compliant |
| 574502B03300G | 9.02 | 21.84 | 19.05 | TO-220 | Al | Compliant |
| 574502B03700G | 9.02 | 21.84 | 19.05 | TO-220 | Al | Compliant |
| 576802B00000G | 12.7 | 12.7 | 19.05 | TO-220*, TO-262 | Al | Compliant |
| 576802B03100G | 12.7 | 12.7 | 19.05 | TO-220*, TO-262 | Al | Compliant |
| 576802B04000G | 12.7 | 12.7 | 19.05 | TO-220*, TO-262 | Al | Compliant |
| 577102B00000G | 9.52 | 13.21 | 19.05 | TO-220* | Al | Compliant |
| 577202B00000G | 12.7 | 13.21 | 19.05 | TO-220* | Al | Compliant |
| 592502B03400G | 6.35 | 22.22 | 31.75 | TO-220* | Al | Compliant |
| 593002B03400G | 12.7 | 23.93 | 29.97 | TO-220* | Al | Compliant |
| 593202B03500G | 12.2 | 25.5 | 50.8 | TO-220* | Al | Compliant |
| PF750G | 11 | 22 | 19 | TO-220* | Al (Tin) | Compliant |
Part number |
Device types |
Contents of kit |
| 4880G | TO-220 | Qty 1, thermalfilm insulator |
| Qty 1, shoulder washer | ||
| Qty 1, flat washer #4 | ||
| Qty 1, No. 4-40 UNC-2B, hex nut | ||
| Qty 1, No. 4-40 UNC-2A x 1/2 in. Long phillips pan head screw | ||
| Qty 1, Lockwasher, No.4. | ||
| 4880SG | TO-220 | Qty 1, In-Sil-8 insulator |
| Qty 1, shoulder washer | ||
| Qty 1, flat washer #4 | ||
| Qty 1, No. 4-40 UNC-2B, hex nut | ||
| Qty 1, No. 4-40 UNC-2A X, 1/2 in. Long phillips pan head screw | ||
| Qty 1, Lockwasher, No.4. |
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