BSM25GB120DN2 Infineon 1200V 38A Half-Bridge IGBT Module

Content last revised on December 8, 2025

BSM25GB120DN2: An Engineer's Guide to the 1200V Half-Bridge IGBT Module

Precision and Protection in a Single Package

The BSM25GB120DN2 is a 1200V | 38A (@ 25°C) IGBT power module engineered for high-efficiency power conversion systems. Integrating a half-bridge configuration with fast free-wheeling diodes and an NTC thermistor into a single, insulated base plate package, it delivers a robust solution for designers. The key benefits include enhanced thermal management through integrated temperature sensing and optimized switching performance. For systems requiring lower current handling or different configurations, a variety of modules exist, but the BSM25GB120DN2's balanced feature set makes it a strong candidate for demanding industrial applications. What is the primary benefit of the integrated NTC thermistor? It allows for direct, real-time temperature monitoring, enabling proactive thermal protection and enhancing long-term system reliability.

Key Parameter Overview

Decoding the Specs for Enhanced Thermal Reliability

The technical specifications of the BSM25GB120DN2 highlight its suitability for applications where both conduction and switching losses are critical design considerations. The module's parameters are structured to support robust and thermally stable operation.

Download the BSM25GB120DN2 datasheet for detailed specifications and performance curves.

Application Scenarios & Value

Achieving System-Level Benefits in Industrial Drives

For design engineers developing small to medium-sized Variable Frequency Drives (VFDs), managing thermal load while maintaining a compact footprint is a primary challenge. The BSM25GB120DN2 directly addresses this. Its half-bridge topology simplifies the inverter stage layout, while the 1200V blocking voltage provides substantial safety margin for 380/400V AC line applications. The module's true value is unlocked by its integrated NTC thermistor. Instead of relying on external sensors, a drive's control system can directly poll the NTC to get a precise reading of the module's internal temperature. This data is critical for implementing intelligent thermal management strategies, such as dynamically adjusting switching frequency or derating output current to prevent overheating, thereby maximizing the drive's operational lifespan. For systems requiring higher power output, the related BSM50GB120DN2 offers double the current handling capacity within a similar technological framework.

Frequently Asked Questions

Engineering Insights for the BSM25GB120DN2

How does the integrated NTC thermistor in the BSM25GB120DN2 improve system reliability compared to external temperature sensors?

The integrated NTC is bonded directly to the module's substrate, placing it much closer to the IGBT and diode chips—the primary sources of heat. This proximity provides a far more accurate and immediate temperature reading than an external sensor mounted on the heatsink. This rapid feedback allows the control system to react faster to overload or cooling fault conditions, preventing the junction temperature from exceeding its maximum rating of 150°C and significantly enhancing the long-term reliability of the power stage.

What is the significance of the 2.5V Collector-Emitter Saturation Voltage (VCE(sat)) for my design?

The VCE(sat) of 2.5V is a direct measure of the module's conduction losses—the power dissipated as heat when the IGBT is fully on. A lower VCE(sat) means higher efficiency, as less energy is wasted. For an engineer, this translates into a reduced thermal load on the heatsink, potentially allowing for a smaller, more cost-effective cooling solution or enabling higher power density within the same enclosure size. This is a crucial factor in applications like compact servo drives or uninterruptible power supplies where space and efficiency are paramount. For further reading, understanding VCE(sat) calculation is key to precise thermal design.

To evaluate the BSM25GB120DN2 for your specific application requirements or to explore its integration into your power system design, our team is available to provide further technical information.