Introduction

When selecting power modules for industrial or commercial applications, choosing between Infineon and STMicroelectronics can be a critical decision. Both companies are globally recognized for their innovation in semiconductor technologies, particularly in IGBT power modules. While they each offer efficient, high-performance solutions, there are important differences in design philosophy, technology, product portfolio, and application focus. This article explores the key distinctions between Infineon and STMicroelectronics power modules, helping you make informed choices—especially when browsing and sourcing components from trusted distributors like IGBTExpress.com.IGBTExpress.com offers a wide range of IGBT Power Module options, including Infineon discontinued modules and STMicroelectronics power module solutions for efficient industrial and electronic applications.

Company Background and Core Competencies

Infineon Technologies

Infineon, a German semiconductor manufacturer, is renowned for its leadership in power electronics, automotive semiconductors, and digital security. Formerly part of Siemens, Infineon has been at the forefront of IGBT development, offering a vast range of power modules with innovations in efficiency, switching speed, and thermal management.

STMicroelectronics

STMicroelectronics is a Franco-Italian multinational specializing in semiconductors for automotive, industrial, consumer, and IoT applications. ST’s power electronics division is known for combining smart features with energy efficiency. Their portfolio includes IGBTs, MOSFETs, and intelligent power modules (IPMs), with a strong emphasis on compactness and integrated functionality.

Technology and Architecture

Infineon: Trench and Field-Stop IGBT Technology

Infineon pioneered TrenchSTOP™ and Field-Stop IGBT technologies that reduce switching losses and improve thermal performance. These features make Infineon IGBT modules ideal for high-speed switching and harsh industrial environments.

STMicroelectronics: Advanced Trench Gate and Soft Switching

ST uses advanced trench gate structures combined with soft switching characteristics, making their modules well-suited for medium-frequency applications. Their SLLIMM (Small Low-Loss Intelligent Molded Module) and ACEPACK series also emphasize ease of integration and low EMI emissions.

Product Portfolio and Packaging

Infineon Power Modules

• EconoDUAL™, EasyPACK™, and PrimePACK™ families

• Voltage ranges: 600V to 1700V

• Current handling: from tens to hundreds of amperes

• Targeted at: industrial drives, renewable energy, UPS, traction systems

STMicroelectronics Power Modules

• SLLIMM, ACEPACK, and STPOWER modules

• Voltage ranges: 500V to 1200V

• Compact, integrated solutions

• Targeted at: home appliances, industrial automation, electric vehicles

Applications and Use Cases

Infineon modules are preferred in:

• Solar and wind power inverters

• Electric vehicle traction inverters

• Medium-to-heavy-duty motor drives

• High-frequency welding systems

STMicroelectronics modules are ideal for:

• Household appliances and HVAC

• Light industrial motor control

• Compact drives in robotics

• Onboard chargers and inverters for EVs

Thermal Management and Efficiency

Infineon modules often feature enhanced heat dissipation structures such as direct copper bonding (DCB) substrates and solder-less press-fit pins for better thermal cycling and long-term reliability.

STMicroelectronics emphasizes system-in-package (SiP) designs that integrate gate drivers, protection features, and control interfaces into a single unit, which simplifies cooling requirements in lower-power applications.

Availability and Legacy Support

Infineon has a longer history in IGBT development and a broader legacy footprint. However, this also means many Infineon modules have been discontinued. IGBTExpress.com is a valuable resource for sourcing such legacy Infineon discontinued modules, helping businesses maintain aging equipment.

STMicroelectronics, while more recent in some sectors, offers newer, more integrated modules that are readily available and ideal for system upgrades or compact designs.

Price and Integration Complexity

• Infineon modules, especially in higher voltage/current ranges, are priced for performance and reliability. They may require external gate drivers and thermal management systems.

• STMicroelectronics modules are often more cost-effective in low-to-mid-power applications, offering simplified integration due to built-in features and smaller form factors.

Support and Ecosystem

Both companies offer extensive support materials, including:

• Application notes

• Simulation models

• Reference designs

• Design tools (like Infineon's iMOTION and ST’s eDesignSuite)

However, Infineon generally provides more industrial-level tools tailored to large-scale automation and energy conversion systems, while ST focuses on user-friendly kits for developers and designers in consumer and light industrial markets.

Summary of Key Differences

Conclusion

Choosing between Infineon and STMicroelectronics power modules depends on the specific requirements of your application—such as voltage range, integration level, and system complexity. Infineon offers high-performance, robust solutions suitable for demanding industrial and renewable energy systems. STMicroelectronics delivers compact, easy-to-use modules ideal for embedded and automation applications.

Distributors like IGBTExpress.com make this decision easier by providing access to both new and legacy modules from Infineon and STMicroelectronics. Whether you're maintaining existing infrastructure or designing new systems, IGBTExpress offers the inventory, documentation, and support to help you choose the best solution. Explore their range today and find the right power module for your needs.