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extruded heatsink

Extruded Heat Sink

Heatell is one of the leading extruded heat sink manufacturers in China, with 5 sets of full automatic extrusion lines from 660T to 4000T, We are capable of producing the biggest cross-width size to 400mm. 

Heatell has on-site engineers to support your initial sketch and evaluate your heat dissipation feature, correctly your extruded heat sink weakness, and offers your full design and manufacturing solution.

Send us your extruded heatsinks and let’s talk, we will ensure to supply cost-effective with premier quality.

Your Top Extruded Heat Sink Supplier and Manufacturer

Heatell is a company on design and manufacturing experience of extruded heat sink for more than 8 years, we own advanced extrusion line imported from Taiwan,

aluminum extruded heat sink

Heatell extruded heatsinks have a high aspect ratio that is able to reach 15-20, Increasing a lot on thermal dissipation feature in related large power electronic requirements.

extruded aluminum heat sink

If your project needs to import extruded heatsink, you are at the right place.

extruded heat sink

Heatell extruded heat sink has a high fin density feature with a unique shape, we also custom fabricate your heatsink extrusions such as cutting, CNC milling, Revieting, fine surface treatment, which will save your whole purchasing cost.

extruded heatsink

heat sink extrusion process

Item TypeExtruded Heat Sink
Production ProcessProfiles Extruding—Cutting—CNC Machining(Milling, Drilling, Tapping)—Deburring— Cleaning— Inspecting–Packing
Technicalextrusion, skived fin, stamping, cold forging, bonded fin, die-cast, liquid cold plates, folded fin
ApplicationLED Lighting, Inverter, Welding Machine, Communication Device, Power Supply Equipment, Electronic Industry, Thermoelectric Coolers/Generator, IGBT/UPS Cooling Systems, etc.
ThicknessBased on your requirements.
Film Thickness
Anodized: Customized. Normal thickness: 8 um-25um.
Powder Coating: Customized. Normal thickness: 60-120 um.
ColorSilver, black, white, bronze, champagne, green, gray, golden yellow, nickel, or customized.
FinishAnodizing, Mill finish, Electroplating, Polishing, Sand blasted, Powder coating, Silver plating, Brushed, Painted, PVDF, etc.
Lengthcustomized length
Deep processCNC,drilling,milling,cutting,stamping,welding,bending,assembling,Custom Aluminum Fabrication
Packagingstandard export packaging or as discussed
Service1. Free sample, Free design;
2. OEM/ODM available;
3. Custom-made request;
4. New design solution suggestion
Delivery time15-20 days after sample confirmed & down payment, or negotiated
PortShanghai Port
Our Advantagesuperior quality with competitive price, Certified enterprises in China

Furthermore, Heatell not only guarantees your production quality control in-house but also provides manufacturing optimization to suit your every project.  

heat sink profile testing

-Standard Packing Option-

* Express Delivery*
* Ocean Delivery*

-Loading & Shipment-

Heatell: Your Premier Extruded Heatsink Manufacturer and Provider with High Quality

Leading industry worldwide, Heatell is the best manufacturer to work with your extruded heatsink you need. We offer the most economical and effective heatsink products made from extruded aluminum.

extruded heat sink advantage

Heatell keeps a huge inventory of extruded heatsinks of numerous configurations and sizes. Heatell extruded heatsinks are the most common and cost-efficient heatsink production methods in Heatell.

heat sink extrusion

As a leading manufacturer in China, Heatell has been a world-leading provider of standard and custom extruded heatsink options for immediate solution optimization for board-level devices. Mainly are TO packages, CPU’s & GPU’s, and BGA/FPGA devices.

extruded heat sink manufacturers heatsink profile

Our standard extruded heatsink is available with many mounting methods. They come with pre-applied thermal interface materials for PCB assemblies. Heatell extruded heatsink is very popular and become preferable in most industries.

heat sink aluminium extrusion

In fact, for 0ver 8 years, Heatell has been a leading extruded heatsink provider in commercial LED lighting, electronic equipment, electronic instrument, automotive equipment, and many more.

The most common aluminum alloy to construct Heatell extruded heatsinks is alloy 6061 and 6063 for high thermal conductivity. Heatell extruded heatsink fabrication allows for notable weight savings than copper.

However, Heatell extruded heatsink can be manufactured according to the alloy of your choice. Just let us know the temper and alloy you prefer. With Heatell extruded heatsink, you are guaranteed fairly strong features for intended applications.

Different surface finish for extruded heatsink is obtainable in Heatell. You will find an anodized extruded heatsink, which is one of the most popular surface finishes in Heatell. Anodization is an electrochemical process that provides corrosion resistance, surface emissivity, electrical isolation, and wear resistance.

Coatings like powder or paint are not applicable for Heatell extruded heatsinks because they will react as insulators. Our extruded heat sink can be anodized with numerous colored dyes. Just send us your preferences.

If you already have special requirements for your ideal extruded heatsink, we can help you fabricate them. And if nothing else, you can choose our standard heatsink in our factory. We provide a wide array of capabilities to receive you the surface finish, alloy, and minor operations you need. They are made to order and you can select your own finishing and alloy options.

Heatell extruded heat sinks are available in stock for standard shape, our sales engineers will figure out the most similar shape to save your tooling cost. You do not need to pay any initial die cost and even low MOQ if available in stock.

Heatell warmly welcomes to you visit our factory and establish a long term business relationship.

Any inquiry, drop us a note, we are willing to reply to you with 7X24Hours.

Extruded Heat Sink: The Ultimate Guide

I know you are probably looking for more information about extruded heat sink.

In this guide, you will find all information you are looking for about heat sink extrusion such as material type, design, fabrication technique, benefits and other features, just to mention a few.

So, keep reading to learn more.

1.  What Is Extruded Heat Sink?

It refers to a mechanical element usually fixed to an electrical to assist in effective heat transfer from the equipment to its environment.

This type of heat sink is arguably the most common in a wide range of applications in different electrical and electronic devices.

extruded heat sink

Extruded heat sink

You can find extruded heat sinks in a broad range of designs, sizes and configurations.

Besides, this heat sink is available in custom designs to ensure you get what best suits your specific application demands.

2.  Material For Heat Sink Extrusion

When determining the best material for your extruded heat sink, you need to figure out the specific application demands and surroundings.

Often, you will find this element in a wide variety of materials.

But the commonly used materials include the following;


It is arguably the most preferred material for making extruded heat sinks used in different applications.

Aluminum is naturally lightweight, thus facilitating manufacturing of easily portable heat sink extrusion.

Moreover, this material is non-corrosive, and this guarantees immense longevity.

It also exhibits higher thermal conductivity hence ideal in different heat transfer applications.

Extruded aluminum heat sinks are also regarded to offer the most cost-effective solutions in a wide range of electronic cooling applications.


It is known for its ductility, malleability and superior heat conductivity.

Copper is also corrosion-resistant, but it is relatively costlier and heavier than aluminum.

Often, this material is more suitable for applications which require higher thermal conductivity.


This material is also used in making extruded heat sinks, albeit for a few applications.

Iron is soft, ductile and exhibits relative heat conductivity.

3.  Active Extruded Vs Passive Extruded Heat Sink

Ordinarily, extruded heat sinks are available in two primary types, which include active and passive heat sinks.

The main difference between these two types primarily lies in the actual design construction and parts.

In essence, an active extruded heat sink consists of a mechanical element that facilitates the cooling process.

extruded active heat sink

Active extruded heat sink

Hence, blowers and fans in this type of extruded heat sink tend to be more effective in the overall process but are often more expensive.

On the other hand, passive extruded heat sink hardly contain any mechanical elements.

As such, they function by cooling the specific device through convection process.

It means that the heat is dissipated into air as airflows across the heat sink fins.

passive extruded heat sink

passive extruded heat sink

Therefore, you’ll notice that passive extruded heat sinks tend to be more reliable since they hardly come with any moving components.

4.  How To Select The Best Extruded Heat Sink

The selection process for the most suitable extruded heat sink is relatively straightforward.

Ideally, there are a few simple steps you can follow to guide you in arriving at the right choice.

It is recommended to create thermal modules and simulations using computer programs.

From the analysis, it becomes easy to establish the specific extruded heat sink you need based on performance.

The findings you obtain from the analysis act as a starting point for designing your specific extruded heat sinks.

Alternatively, you can seek guidance from the manufacturer to provide you with respective mechanical and thermal models.

It is fundamental because it allows you to create a thermal map of your application for detailed analysis.

Hence, you can use such information to establish whether the particular extruded heat sink suits your needs.

5.  Surface Coating Options For Heat Sink Extrusion

You can apply different surface coating options on extruded heat sinks, depending on the actual application.

Of course, the most suitable varies based on the type of material used in making the heat sink.

But the commonly used ones on many occasions include the following;

  • Powder coating – It refers to surface coating treatment that involves using an electric charge to trigger dry powder and fusing it to the material.
  • Anodizing – This entails using electrochemical process to convert surface material to a resilient, decorative and corrosion-resistant anodic oxide finish.
  • Nickel plating – It exhibits exceptional solderability and dimensional repeatability. Often, this finish appears as a yellowish-white hue.
  • Chromate finishing – This surface finishing involves converting the metal surface to offer immense corrosion resistance, particularly on the non-ferrous surface.

6.  Benefits Of Extruded Heat Sink

This type of heat sink offers a wide range of benefits when used in different applications compared with other manufacturing methods.

The outstanding benefits this design offer include the following;

  • Cost-effective – It is affordable primarily all-round because the tooling and unit price tends to be low, especially in mass production.
  • High quality and attractive final product – Primary materials for making this component exhibit excellent surface appearance and mechanical properties.
  • You can easily customize dimensions of the extruded heat sink during production process without necessarily using new tooling.
  • It is quite easy to attain secondary operation with extruded heat sink.
  • You are guaranteed to obtain best thermal performance for forced convection.
  • Suitable for applications where medium to high air flows are a concern.
  • Available in cross-cut extrusions allowing it to offer Omni-directional properties.

7.  How Extruded Heat Sink Functions

The design of extruding heat sink is to allow it to remove heat out of from the electrical and electronic components.

Hence, here is how heat transfer in this heat sink takes place;

  • Heat production

Ordinarily, any equipment, device or system generating a reasonable amount of heat needs a technique to eliminate heat to function is the source.

  • Heat transfer

At this point, heat moves from the source to the extruded heat sink.

Extruded heat sink’s material thermal conductivity influences the actual rate of heat transfer.

  • Heat distribution

In this case, the heat moves to the extruded heat sink either actively or passively.

Often, it usually happens as heat moves down the temperature difference from high to low-temperature settings.

Hence, this extruded heat sink thermal profile could be uneven; consequently, it makes them quite hot at the source and relatively cool at the ends.

  • Heat dissipation

This process is affected by the temperature gradient of the extruded heat sink.

Ideally, fluid moving across the extruded heat sink applies thermal diffusion and convection to eliminate heat.

Besides, temperature difference between extruded heat sink and the environment should exist to facilitate heat dissipation.

8.  Suitable Aluminum Alloy For Extruded Heat Sink

Aluminum is unquestionably the most preferred material for manufacturing different types of extruded heat sinks.

However, it is available in a wide range of alloys; hence it is important to determine the suitable variant to use for your heat sink.

Nevertheless, the commonly used aluminum alloy is the 6000 series.

Aluminum alloys in this series have a reasonable thermal conductivity that ranges from 166 to 201 (W/m•K).

Besides, aluminum 6000 series tend to be relatively durable since they come with natural corrosion-resistant elements.

Aluminum alloys in 6000 series are also affordable and versatile; thus, they make extruded heat sinks ideal for a wide range of applications.

On the other hand, aluminum 1050 alloy is also a suitable choice you may consider.

But its primary concern is that it may make extruded heat sinks, which are only suitable for specific applications since it is mechanically soft.

Nevertheless, it is advisable to ensure you consider different factors other than thermal conductivity when selecting an ideal aluminum alloy.

9.  Applications Of Extruded Heat Sink

Typical extruded heat sinks are used in a wide range of industrial and engineering applications.

Some common applications, nevertheless, include the following;

  • Medical appliances – Ideally, temperature control is a significant concern in overall healthcare industry. Devices in this sector must work effectively to serve patients.

Hence, extruded heat sinks enable such devices to function at required temperatures to ensure healthcare facilities guarantee best services to patients.

  • Computer hardware – This heat sink is common in a wide range of computer hardware components.

For instance, graphic cards and processors are among the common components in computers where this heat sink tends to be essential.

  • Audio appliances – You can use extruded heat sinks in various audio equipment, especially those used in recording studios.
  • Microprocessors – In several industrial equipment, devices and machines, microprocessors play quite a significant role.

Thus, extruded heat sinks in microprocessors facilitate effective ways of cooling and ensuring they work at optimum.

  • Electrical circuits – Several electrical devices and electronics use circuits to facilitate efficiency and optimum performance.

As such, you have to maintain temperature to prevent functional failure hence the essence of extruded heat sinks.

Some electrical circuits where these heat sinks are quite common include ICs, semiconductors, LED systems, transistors, voltage regulators, etc.

10.  Types Of Fin Configurations For Extruded Heat Sink

Fins are essential elements in extruded heat sinks because they enhance effective heat dissipation.

These fins are available in different configurations, but the main types include the following;

  • Flared fins

These types of fins on extruded heat sinks are not necessarily parallel to each other.

In essence, the design of this configuration is to enable it to reduce resistance and flow.

As such, it allows more air to flow through heat sinks and cool down the application effectively.

  • Straight fins

They are the types of fins designed to run through the entire length of extruded heat sink.

Often, you will find them existing at frequent intervals, especially on the sinks with fixed gaps.

This type of configuration is also available as crosscut heat sinks.

  • Pin fins

These extruded heat sink fin configurations have high aspect ratios, particularly for applications with adequate airflow.

Ideally, the pin fin design provides low-pressure drop features.

Besides, the pins have a large surface area often combined with the base to provide increased heat sink performance.

11.  Extruded Heat Sink Vs Bonded Fin Heat Sink

These two types of heat sinks vary in different aspects, such as the following;

Heat sink extrusion is regarded as a utility infielder in heat control industry.

It is quite affordable because the moment a design is made, the processing is highly automated.

Extruded heat sink

Extruded heat sink

In many instances, aluminum is the material used in making extruded heat sinks, making them reasonably good thermal conductors.

Besides, extruded heat sink is generally used for general applications based on fin pitch, design and base thickness.

However, this specific heat sink type is limited to dimensions, given that most are based on aluminum extrusion with a given width.

On the other hand, bonded fin heat sink is generally inclined towards physically large applications, which need moderate performance.

You can use aluminum and copper to make this type of heat sink manufactured by attaching individual metal fins to a base.

In many instances, thermal epoxy and brazing are the main techniques for bonding the metal fins to the base.

Nevertheless, bonded fin heat sink is beneficial from the perspective of handling large applications like DC-DC brick.

But its shortcoming is that its manufacturing process isn’t automated on a scale of extruded, folded or stamped fin heat sinks, making it costlier.

bonded fin heat sink

bonded fin heat snk

12.  Fabricating Extruded Heat Sink

Ordinarily, as the name suggests, extruded heat sinks are manufactured through extrusion process.

What happens is that the heat sink material, in most cases aluminum, is passed through a die.

The specific die is often made based on the desired cross-section.

Once the heat sink material passes through the configured die, it forms a heat sink with a shape resembling the die.

This method is also essential in making complex cross-sections.

Besides, you can easily customize extruded heat sinks using a wide range of molds after the initial manufacturing.

13.  Available Colors For Extruded Heat Sink

You can find extruded heat sinks in different colors and hues.

The common color variations available for this type of heat sink include; gray, brown, black, charcoal, green, red, white, silver, tan, bronze, blue, etc.

Nonetheless, color does not necessarily affect performance of extruded heat sink.

It only creates a visual difference but not how slow or fast your device or equipment is cooled.

However, it is advisable to avoid painting extruded heat sinks.

Paints often form a layer over the heat sink, which makes it substitute the role of an insulator.

Therefore, it will prevent the heat sink from dissipating heat effectively.

14.  Parameters To Consider When Choosing Extruded Heat Sink

It is always important to ensure you choose the right extruded heat sink when shopping for one.

Therefore, it means you have to look into various elements to attain the most suitable one.

Some parameters to look into when making your choice include the following;


Often, aluminum is predominantly used in making different extruded heat sinks for a wide range of applications.

This doesn’t imply that you can’t find these heat sinks in other materials like copper.

However, aluminum is quite ideal, especially for most applications where these heat sinks are used.

It is a preferred material since it has high thermal conductivity, durability and excellent thermal qualities.


Usually, fins used in extruded heat sink come in different configurations, shapes and sizes.

Each configuration influences performance of the heat sink.

For example, flared fins guarantee a larger surface area suitable for effective heat dissipation.

Thermal Modeling

It is an important parameter which determines the desired performance of extruded heat sink.

Always ensure you use recommended computer software to determine the right thermal modeling of extruded heat sink.

Fin Efficiency

The role of fins in a heat sink is to take the heat from the equipment or device and transfer it to the surrounding, whether fluid or air.

Therefore, it is important to understand ways of enhancing fins’ efficiency depending on the application demands.

For instance, you can reduce the fins’ length or increase the aspect ratio.

Spreading Resistance

It indicates whether there is even heat distribution through the extruded heat sink base.

Hence, this phenomenon shows how heat travels from heat source location, causing a large temperature gradient between heat source and heat sink edges.

15.  Ways Of Enhancing Efficiency Of Extruded Heat Sink

You can use several ways to improve the overall performance of extruded heat sinks.

But the popular methods include the following;

  • Increasing the surface area of specific fins you are using
  • Opting for a heat sink with flared pin design
  • Increasing the aspect ratio
  • Using a high thermal conductivity material to make fins
  • Reducing the lengths of fins

16.  Factors Determining Extruded Heat Sink Cost

When purchasing extruded heat sink, you will always find them at different rates.

Such rates are influenced by several factors, include the following;


Aluminum is most preferred material for making extruded heat sink since it exhibits ideal properties that guarantee better performance and efficiency.

Hence, extruded aluminum heat sink is likely to be more expensive than one made using other materials such as copper.


Often, manufacturers place a minimum quantity of extruded heat sinks you can order at a particular time.

The essence is to control price, which ultimately affects the cost of these components.

Usually, buying extruded heat sink in bulk guarantees higher discounts hence cheaper than buying a few pieces at a time.

Size and Design

Large extruded heat sinks are a bit pricier than smaller units.

Also, custom designs tend to be more expensive than standard designs.

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