Content last revised on October 28, 2025.
SEMiX353GB126V1: A 1200V Trench IGBT Module for Industrial Power Systems
Introduction and Key Features
Engineering a Foundation for High-Reliability Power Conversion
The Semikron SEMiX353GB126V1 is a robust half-bridge IGBT module designed to provide a dependable and efficient power switching foundation for demanding industrial applications. Delivering a potent combination of voltage and current handling, this module streamlines the design of high-power inverters and drives. Its key specifications include: 1200V Vces | 350A Nominal Current | Half-Bridge Configuration. The primary engineering benefits are simplified power stage assembly and the inherent efficiency of proven Trench IGBT technology. Best fit for designers of medium-power three-phase inverters, typically in the 100-150 kW range, who require a standard-footprint module for streamlined manufacturing.
Key Parameter Overview
Core Specifications for Power System Sizing
The technical specifications of the SEMiX353GB126V1 are tailored for high-power industrial systems. The 1200V rating provides a significant safety margin for applications operating on 400V and 480V AC lines. The following table highlights the critical parameters for system design and integration.
| Parameter | Value | Engineering Significance |
|---|---|---|
| Collector-Emitter Voltage (Vces) | 1200V | Enables safe operation in 400V/480V AC-line-fed inverters with sufficient tolerance for voltage transients. |
| Continuous Collector Current (Ic) @ Tc=80°C | ~256A | Defines the module's capacity for sustained power delivery under typical industrial operating conditions. |
| Topology | Half-Bridge (Dual IGBT) | Ideal building block for creating three-phase inverter legs, simplifying layout and busbar design. |
| Technology | Trench Gate IGBT | Provides a favorable balance of low conduction losses (Vce(sat)) and switching performance. |
Download the SEMiX353GB126V1 datasheet for detailed specifications and performance curves.
Application Scenarios & Value
System-Level Benefits in Industrial Power Conversion
The SEMiX353GB126V1 IGBT module is engineered as a core component for a range of medium-to-high power conversion systems where reliability and efficiency are paramount. Its standardized housing and robust electrical characteristics make it a workhorse for industrial system integrators.
A prime application is in a 125 kW Variable Frequency Drive (VFD) used to control large induction motors in manufacturing or material handling. The challenge for a VFD designer is to manage both continuous load currents and intermittent start-up surges. The 350A-class rating of this module provides the necessary current handling capability, while the 1200V Vces offers a crucial safety margin against DC bus voltage overshoots common in motor drive applications. Think of the 1200V rating as a "dam height" for electricity. For a system with a nominal DC bus of 650V, a 1200V rating provides a substantial protective wall, preventing catastrophic failure during transient events and ensuring long-term operational reliability.
- AC Inverter Drives: Forms the heart of the power stage in three-phase motor controls, enabling precise speed and torque regulation.
- Uninterruptible Power Supplies (UPS): Delivers the robust switching necessary to ensure a seamless transition to battery power and protect critical loads.
- Renewable Energy Systems: Suitable for the inverter stage of commercial-scale solar inverters or wind turbine converters, facilitating efficient grid integration.
- Welding Power Supplies: Provides the high-current switching capability required for advanced welding processes.
For applications requiring higher current handling capabilities within a similar package footprint, the related SEMIX453GB12E4S provides an increased current rating, potentially supporting higher power output designs.
Frequently Asked Questions
Engineering Inquiries on the SEMiX353GB126V1
What does the 1200V Vces rating mean for my application design?A 1200V Vces rating provides a critical safety margin for inverters operating on 400V or 480V industrial AC lines. After rectification, these line voltages can create DC bus levels of 560V to 670V. The 1200V rating ensures the device can withstand voltage spikes caused by switching operations and line disturbances, a key factor in building a robust and reliable system.
How does the half-bridge configuration of the SEMiX353GB126V1 simplify inverter design?A half-bridge module contains two IGBTs in a classic totem-pole arrangement, which is the fundamental building block for one phase of a three-phase inverter. Using three such modules significantly simplifies the mechanical layout, busbar design, and gate drive routing compared to using six individual discrete IGBTs. This accelerates assembly and improves the reliability and serviceability of the final product.
What are the primary applications for a module with these voltage and current ratings?This module is optimized for medium-power industrial systems, typically ranging from 75 kW to 150 kW. Its specifications make it a strong candidate for AC motor drives, uninterruptible power supplies (UPS), commercial solar inverters, and high-power battery chargers.
Is this module suitable for high-frequency switching?As a Trench Gate IGBT, it offers a good balance between conduction and switching losses. While specific switching frequencies depend heavily on thermal management and operating conditions, modules of this class are typically employed in applications with switching frequencies from a few kHz up to around 15-20 kHz. For a definitive answer, consulting the switching energy (Eon, Eoff) curves in the official datasheet is essential for calculating losses at your target frequency.
A Strategic Component for Industrial Modernization
The SEMiX353GB126V1 represents a strategic choice for engineers developing next-generation industrial equipment. By integrating proven Semikron technology into a standard, easy-to-integrate package, this module helps design teams balance performance, reliability, and manufacturing efficiency. Its role as a fundamental power building block makes it relevant for advancing energy efficiency in motor drives and enhancing the stability of renewable energy systems, aligning with broader industry goals for smarter and more sustainable power utilization. A sound IGBT Module Selection strategy often hinges on such well-rounded components.
