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Bergquist HT-04503

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Bergquist HT-04503 PCB Board

As a PCB design supervisor, you understand the critical role that materials play in achieving high-performance electronic designs. When it comes to thermal management, selecting the right PCB material is paramount. Enter the Bergquist HT-04503. In this article, we delve into the exceptional properties and benefits of the HT-04503, demonstrating how it can unlock new dimensions of thermal management in your PCB designs, ensuring optimal performance and reliability.

What Is Bergquist HT-04503?

Bergquist HT-04503 is Thermal Clad Metal Core PCBs (MCPCBs) substrates, and it offer superior thermal management capabilities compared to standard printed wiring boards (PWBs). These substrates provide enhanced mechanical durability when compared to thick-film ceramic and direct bond copper constructions.

Thermal Clad presents a cost-effective solution that can streamline designs, reduce component count, enable smaller device form factors, and simplify the overall production process. Furthermore, it offers the advantage of lower operating temperatures, leading to extended component lifespan and improved durability.

The key to Thermal Clad’s performance lies in its dielectric material. This datasheet focuses on the performance characteristics of Thermal Clad HT 3 mils (High Temperature), a dielectric that exhibits exceptional resistance to degradation caused by exposure to high temperatures. It also demonstrates high dielectric breakdown capabilities. This dielectric has been successfully employed in various applications, including LED lighting, power conversion systems, heat rails, solid-state relays, and motor drives.

Benefits of Bergquist HT-04503

The Bergquist HT-04503 offers several notable benefits for thermal management in electronic applications:

1. Exceptionally Low Thermal Resistance: With a thermal resistance of only 0.05°Cin2/W (0.32°Ccm2/W), this material efficiently transfers heat, allowing for effective dissipation and temperature control.

2. High Thermal Conductivity: The HT-04503 boasts a high thermal conductivity of 4.1 W/m-K, enabling efficient heat transfer across the material and reducing thermal hotspots.

3. Suitable for High-Temperature Applications: Designed to withstand elevated temperatures, this material is well-suited for applications that require effective thermal management in challenging environments.

4. Compatibility with Lead-Free Solder: The HT-04503 is compatible with lead-free soldering processes, ensuring compliance with environmental regulations and avoiding the use of hazardous substances.

5. Eutectic AuSn Compatibility: It is also compatible with eutectic AuSn, a solder alloy commonly used in electronic assembly, enabling reliable bonding and ensuring compatibility with various manufacturing processes.

6. RoHS Compliance and Environmental Friendliness: The HT-04503 is RoHS compliant, adhering to strict environmental standards. It is designed with sustainability in mind, minimizing environmental impact.

7. Versatile Application: This material can be applied to both aluminum and copper metal substrates, providing flexibility and compatibility with different electronic designs and configurations.

Overall, the Bergquist HT-04503 offers exceptional thermal performance, high-temperature resistance, compatibility with various soldering processes, and environmental compliance, making it a reliable and versatile choice for thermal management in electronic applications.

Comparison with Other Thermal Interface Materials

When comparing the Bergquist HT-04503 with other thermal interface materials (TIMs), several factors should be taken into consideration:

1. Thermal Conductivity: The thermal conductivity of a TIM determines its ability to transfer heat efficiently. The Bergquist HT-04503 offers a high thermal conductivity, allowing for effective heat dissipation compared to lower-performing TIMs.

2. Thermal Resistance: Lower thermal resistance is desirable as it helps minimize the temperature difference between the heat source and heat sink. The Bergquist HT-04503 is specifically designed for high watt-density applications, emphasizing low thermal resistance to optimize thermal management.

3. Material Composition: Different TIMs are composed of various materials, such as silicone-based, ceramic-based, or metal-based compounds. The material composition affects properties like thermal conductivity, electrical insulation, and mechanical stability. The Bergquist HT-04503 is formulated with advanced materials to provide excellent thermal performance and reliability.

4. Application Methods: TIMs can be applied using different methods, such as dispensing, screen printing, or pre-applied pads. The suitability of a TIM for a specific application method depends on factors such as ease of application, consistency, and compatibility with the manufacturing process. The Bergquist HT-04503 is designed for compatibility with various application methods, ensuring flexibility in manufacturing processes.

5. Longevity and Reliability: The longevity and reliability of a TIM are critical factors, particularly in demanding applications. The Bergquist HT-04503 is engineered to provide long-term stability and maintain its thermal performance over time, ensuring consistent heat dissipation and avoiding degradation that could impact the system’s reliability.

6. Cost-Effectiveness: TIMs vary in cost, and the overall cost-effectiveness depends on factors such as performance, application requirements, and the specific needs of the project. While the Bergquist HT-04503 may have a higher initial cost compared to some lower-performing TIMs, its superior thermal properties and long-term reliability can result in cost savings by improving system performance and mitigating the risk of failure.

When comparing the Bergquist HT-04503 with other TIMs, it is crucial to evaluate these factors based on the specific application requirements, thermal performance goals, and budget constraints. Conducting thorough testing and considering the overall system design are essential steps to determine the most suitable TIM for a particular project.

Manufacturing and designing Guidelines Bergquist HT-04503

When manufacturing and designing with the Bergquist HT-04503, it is essential to follow certain guidelines to ensure optimal performance and reliability. Here are some recommendations:

1. Mounting Surface Preparation: Before applying the Bergquist HT-04503, ensure that the mounting surface is clean, dry, and free from any contaminants such as dust, oils, or residues. A smooth and flat mounting surface is preferred for efficient heat transfer.

2. Application Method: The HT-04503 can be applied using a variety of methods, including automated dispensing, screen printing, or manual application. Follow the recommended application method provided by Bergquist for best results.

3. Thickness and Coverage: The appropriate thickness and coverage of the HT-04503 depend on the specific application requirements. Follow Bergquist’s guidelines for the recommended thickness range and ensure adequate coverage to achieve efficient heat dissipation.

4. Cure Time and Temperature: The HT-04503 typically requires a curing process to achieve its optimal thermal performance. Follow the recommended cure time and temperature specified by Bergquist for reliable bonding and thermal conductivity.

5. Electrical Isolation: Ensure proper electrical isolation between the HT-04503 and any adjacent conductive components or traces. Use appropriate insulating materials or barriers to prevent electrical short circuits.

6. Thermal Management: Consider the overall thermal management of the system when incorporating the HT-04503. Adequate heat sinking, heat dissipation paths, and ventilation should be implemented to maintain the desired operating temperature range.

7. Handling and Storage: Store the Bergquist HT-04503 in a cool, dry place, away from direct sunlight and moisture. Follow proper handling procedures to prevent damage to the material and maintain its integrity.

8. Testing and Validation: Conduct thorough testing and validation of the HT-04503 in your specific application environment to ensure it meets the desired thermal performance and reliability requirements.

By adhering to these manufacturing and designing guidelines, you can maximize the effectiveness of the Bergquist HT-04503 and achieve optimal thermal management in high watt-density applications for improved performance and longevity.

Bergquist HT-04503: Applications

The Bergquist HT-04503 thermal interface material finds applications in various industries and electronic systems where efficient heat management is crucial. Some of its common applications include:

Power Conversion:

The HT-04503 is widely used in power conversion applications, such as power supplies, inverters, and converters. Its low thermal resistance helps dissipate heat generated by high-power components, ensuring optimal performance and reliability.


In systems with multiple heat sources, the HT-04503 is used to create efficient thermal pathways, known as heat-rails. It helps distribute and dissipate heat evenly across the system, preventing hotspots and maintaining stable operating temperatures.

Solid State Relays:

Solid state relays rely on effective heat transfer to ensure reliable switching and prolonged lifespan. The HT-04503 is employed as a thermal interface material to enhance heat dissipation and improve the overall performance of solid state relays.

Motor Drives:

Motor drives generate significant heat during operation, which can affect their performance and lifespan. By applying the HT-04503 between the motor drive and heat sink, it facilitates efficient heat transfer, keeping the motor drive cool and maintaining its optimal functionality.

LED Applications:

LEDs are increasingly used in various lighting applications, and managing heat is critical to ensure their longevity and performance. The HT-04503 is utilized as a thermal interface material in LED modules, helping to dissipate heat from the LEDs and maintain their efficiency and reliability.

Solar Receivers:

Solar receivers used in concentrated solar power (CSP) systems require effective heat management to maximize energy conversion. The HT-04503 is employed as a thermal interface material in solar receivers, enhancing heat dissipation and improving the overall efficiency of the system.

Future Developments and Trends

1.Enhanced Thermal Conductivity: Future developments may focus on further improving the thermal conductivity of TIMs, allowing for more efficient heat transfer and better thermal management capabilities. This could involve the use of advanced materials or innovative manufacturing techniques.

2.Reduced Thermal Resistance: Manufacturers may continue to refine TIM formulations to minimize thermal resistance, enabling better heat dissipation and lower operating temperatures in high watt-density applications.

3.Thinner and Flexible Designs: There is a growing demand for thinner and more flexible thermal interface materials to accommodate the shrinking form factors of electronic devices. Future developments may involve the design of TIMs that offer excellent thermal performance while being thinner and more conformable to complex surfaces.

4.Customized Solutions: As the diversity of electronic applications increases, there is a trend towards customized thermal solutions. Manufacturers may offer tailored versions of TIMs like the HT-04503, optimized for specific industries, applications, or even individual customer requirements.

5.Sustainability and Environmental Considerations: The industry is increasingly focusing on developing environmentally friendly TIMs that minimize or eliminate the use of harmful substances. Future developments may involve the use of eco-friendly materials and manufacturing processes, ensuring compliance with environmental regulations and customer preferences.

6.Integration of Additional Functionalities: There could be a trend towards integrating additional functionalities into thermal interface materials. For example, TIMs that offer electrical conductivity or insulation properties, electromagnetic interference (EMI) shielding, or even self-healing capabilities, allowing for a multifunctional approach to thermal management.


In the realm of PCB design, thermal management is a top priority for ensuring efficient and reliable operation. The Bergquist HT-04503 PCB material stands as an indispensable solution, empowering design supervisors to elevate their projects to new heights. With its high thermal conductivity, low thermal resistance, and compatibility with various applications, the HT-04503 offers unparalleled thermal management capabilities.

By incorporating this advanced material into your PCB designs, you can mitigate heat-related challenges, enhance system performance, and extend the lifespan of your electronic devices. Embrace the power of the Bergquist HT-04503 and unlock a world of optimized thermal management in your PCB designs. Stay ahead of the competition and revolutionize your electronic systems with this exceptional PCB material.

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