Content last revised on June 15, 2026
BSM75GB170DN2 Infineon 1700V 75A IGBT Module
The BSM75GB170DN2 is a high-voltage IGBT module from the established Infineon (originally Eupec) product line, specifically engineered for half-bridge switching in demanding industrial environments. Delivering a Vces of 1700V and a continuous collector current Ic of 75A, this module utilizes optimized IGBT2 technology to provide a balance between low conduction losses and robust switching performance. For systems requiring higher voltage overhead without sacrificing space, this module offers a standardized solution that addresses high-frequency power conversion challenges.
UVP Statement: This module delivers high-voltage 1700V reliability with optimized switching losses for efficient power conversion in industrial motor drives.
Top Specs: 1700V | 75A | Ptot 625W | Tj (max) 150°C
Key Benefits: Reduced thermal load in high-voltage designs; standardized industrial housing for easy integration.
Core Question Answered: How does this module handle 1700V stresses? The BSM75GB170DN2 incorporates high-isolation materials and rugged chip technology to maintain safe operating areas even under transient voltage spikes common in 690V industrial grids. For 690V drives prioritizing thermal margin, this 1700V module is the optimal choice.
Application Scenarios & Value
Optimizing Power Conversion for 690V Industrial Environments
Engineers often face the challenge of selecting semiconductors that can withstand the high-voltage transients found in heavy-duty Variable Frequency Drive (VFD) systems. In these scenarios, the BSM75GB170DN2 serves as a critical component by providing a 1700V breakdown voltage rating, which offers a significant safety margin over traditional 1200V modules when used in 690V industrial line applications. This extra overhead is essential for maintaining long-term reliability in environments prone to voltage fluctuations or inductive kickback from large motors.
Beyond motor control, this half-bridge module is widely utilized in high-power UPS (Uninterruptible Power Supply) systems and Welding Power Supply equipment. Its internal structure is optimized for fast switching with minimal losses, ensuring that the cooling requirements of the overall system remain manageable. When compared to lower-power versions such as the BSM50GB170DN2, the 75A rating of this module allows for higher throughput in standard converter stages without a significant increase in footprint. For designers scaling up their power density, integrating this module alongside a high-performance Infineon gate driver ensures compliant operation with IEC 61800-3 electromagnetic compatibility standards.
Technical Deep Dive
IGBT2 Technology and the Physics of Low Switching Loss
The BSM75GB170DN2 belongs to a generation of IGBTs that focused on reducing the storage time and tail current during the turn-off phase. In high-voltage 1700V applications, switching losses can quickly become the dominant factor in thermal design. By utilizing a specific dopant profile in the silicon substrate, the DN2 series limits the amount of minority carrier injection, which translates to a cleaner switching waveform and lower Eoff (turn-off energy). This characteristic is vital for high-frequency inverters where power density is at a premium.
A critical technical parameter to monitor is the VCE(sat), which is typically 3.4V at the rated current. To understand this in engineering terms, VCE(sat) is like the pressure drop in a high-flow water valve; the lower it is, the less energy is wasted as heat while the "valve" is fully open. Proper thermal management of this heat is essential. We recommend consulting our guide on IGBT failure modes to better understand how temperature impacts the Safe Operating Area (SOA). Furthermore, the inclusion of a high-speed free-wheeling diode with soft-recovery characteristics minimizes voltage ringing, protecting the IGBT from overvoltage events during hard-switching cycles.
Key Parameter Overview
Functional Specifications for Design Evaluation
| Parameter Category | Technical Specification | Value / Unit |
|---|---|---|
| Voltage Ratings | Collector-Emitter Voltage (Vces) | 1700V |
| Current Capacity | Continuous Collector Current (Ic) | 75A (at Tc=80°C) |
| Power Output | Total Power Dissipation (Ptot) | 625W (per IGBT) |
| Saturation Loss | VCE(sat) at Rated Current | 3.40V (Typical) |
| Thermal Performance | Thermal Resistance (Rthjc) | 0.20 K/W |
| Configuration | Circuit Topology | Half-Bridge |
Download the BSM75GB170DN2 datasheet for detailed specifications and performance curves. To better interpret these values during your design phase, refer to our article on decoding IGBT datasheets.
FAQ
What is the primary engineering significance of the 1700V Vces rating in 690V AC systems?
In 690V AC industrial lines, the peak DC bus voltage often reaches 975V or higher. A 1700V rating provides a substantial safety buffer to handle the voltage overshoots caused by stray inductance during switching, preventing catastrophic avalanche breakdown that might occur with 1200V-rated modules.
How does the VCE(sat) of 3.4V at 75A influence the choice of a heatsink?
With a VCE(sat) of 3.4V and a current of 75A, the static power dissipation per IGBT is approximately 255W. Combined with switching losses, the total heat load requires a low-resistance heatsink (often liquid-cooled or high-airflow forced-air) to keep the junction temperature below the 150°C maximum limit.
Can the BSM75GB170DN2 be used in high-frequency switching applications above 20kHz?
While the DN2 generation is optimized for high-speed switching compared to its predecessors, switching above 20kHz requires careful evaluation of the Switching Loss curves. As frequency increases, the total power dissipation rises linearly; for ultra-high-frequency designs, you may want to consider modules with DLC (Low-Loss) technology to maintain efficiency.
The BSM75GB170DN2 remains a cornerstone for engineers developing reliable high-voltage industrial drives. By providing documented 1700V ruggedness and consistent 75A performance, it empowers technical teams to build power conversion stages that withstand the rigors of heavy machinery and energy infrastructure. For availability and project-specific technical support, we encourage you to contact our sales team directly for the latest data and inventory verification.
