Fuji Electric 7MBR50SB120-60 | V-Series 1200V PIM for Compact Motor Drives
The Fuji Electric 7MBR50SB120-60 is a highly integrated 1200V, 50A Power Integrated Module (PIM) from Fuji's renowned V-Series. Engineered for performance and reliability, this module combines a three-phase converter, a brake chopper, and a three-phase inverter into a single, compact package. It is the definitive solution for engineers developing space-constrained and cost-sensitive applications such as small motor drives, servo systems, and HVAC controls, where efficiency and power density are paramount.
Core Technical Advantages
- High-Density Integration: The 7-in-1 topology significantly reduces the system's bill of materials (BOM), minimizes PCB footprint, and simplifies the assembly process, leading to lower manufacturing costs and improved system reliability.
- Optimized Switching Performance: Leveraging Fuji's 6th generation V-Series technology, the module features advanced trench-gate and field-stop IGBTs paired with soft-recovery free-wheeling diodes (FWDs). This combination ensures a superior balance between low conduction losses and minimal switching losses.
- Enhanced Thermal Management: An integrated NTC thermistor provides real-time temperature feedback, enabling precise thermal monitoring and protection, which is critical for extending the operational lifetime of power conversion systems.
- Proven V-Series Reliability: Built upon a platform known for its robustness, the Fuji Electric 7MBR50SB120-60 offers the long-term dependability required for demanding industrial environments.
Technical Deep Dive: V-Series Technology and PIM Architecture
The performance of the 7MBR50SB120-60 is rooted in two key design philosophies. First is the implementation of the Fuji Electric V-Series IGBT technology. This 6th-generation silicon design optimizes the carrier profile within the chip to achieve a very low collector-emitter saturation voltage (VCE(sat)), directly reducing conduction losses during operation. Simultaneously, the refined field-stop layer and FWD characteristics enable soft-switching behavior, which curtails voltage overshoots and electromagnetic interference (EMI), simplifying the design of snubber circuits and filtering.
Second is the strategic advantage of its Power Integrated Module (PIM) architecture. By co-packaging the rectifier, brake, and inverter stages, Fuji eliminates numerous high-current interconnections that would be required in a discrete solution. This not only saves valuable board space but also reduces stray inductance, leading to cleaner switching waveforms and enhanced overall system efficiency. This level of integration is a cornerstone of modern, high-performance power electronics design.
Application Suitability and Value Proposition
The Fuji Electric 7MBR50SB120-60 is an ideal component for a range of medium-power applications:
- General-Purpose Inverters and Small Motor Drives: For drives in the 7.5 kW to 15 kW range, this module provides a complete power stage solution. Its thermal efficiency and compact P600 package allow for smaller heatsinks and enclosures. For lower power requirements, the 7MBR25SA120-50 offers a similar feature set in a 25A rating.
- HVAC Systems: In air conditioning compressors and ventilation fans, the integrated brake unit effectively manages regenerative energy during deceleration, improving system control and safety without the need for an external braking circuit.
- Servo Drives and Robotics: The fast and soft-recovery FWD is critical for the dynamic performance required in servo applications. It ensures rapid current decay and minimizes losses during the frequent acceleration and deceleration cycles typical in robotics, enhancing positioning accuracy. For systems demanding higher torque, the 7MBR75VB120-50 provides a step-up to 75A within a compatible ecosystem.
Key Technical Parameters
The following table outlines the critical specifications for the 7MBR50SB120-60. For a comprehensive overview, engineers can review the official product datasheet.
| Parameter | Value |
|---|---|
| Collector-Emitter Voltage (VCES) | 1200 V |
| Inverter Collector Current (IC) at Tc=80°C | 50 A |
| Brake Collector Current (IC) at Tc=80°C | 50 A |
| Collector-Emitter Saturation Voltage (VCE(sat)) at IC=50A, Tj=125°C | 1.70 V (Typ.) / 2.15 V (Max.) |
| Maximum Operating Junction Temperature (Tj op) | 150 °C |
| Package Type | P600 (M-Series) |
A datasheet with detailed charts and application notes is available for download here: Fuji Electric 7MBR50SB120-60 Datasheet.
Frequently Asked Questions (FAQ)
What are the primary thermal management considerations for this PIM?
Effective thermal management is crucial for maximizing the reliability of the 7MBR50SB120-60. A properly sized heatsink coupled with a high-quality Thermal Interface Material (TIM) is essential. The integrated NTC thermistor should be connected to the control logic to enable over-temperature protection or thermal rollback, ensuring the module operates within its Safe Operating Area. Understanding the system's thermal resistance is key, a topic explored further in our guide on unlocking IGBT thermal performance.
What gate driver specifications are recommended for the 7MBR50SB120-60?
This module is designed for a standard gate drive voltage of +15V for turn-on and -10V to -15V for turn-off. A negative gate voltage is strongly recommended to ensure immunity against parasitic turn-on induced by the Miller effect, especially at higher switching frequencies. The gate driver should have sufficient peak current capability (typically 1-2A) to charge and discharge the IGBT's gate capacitance efficiently, minimizing switching losses.
For inquiries about specific application designs or to request a quote, please contact our technical team for expert guidance.
