Fuji Electric 7MBR15SC120-50 | Compact PIM for High-Reliability Motor Drives
The Fuji Electric 7MBR15SC120-50 is not just another IGBT module; it is a highly integrated Power Integrated Module (PIM) engineered to streamline the design of low-power motor drives and power conversion systems. By combining a three-phase converter bridge, a three-phase inverter, and a brake chopper into a single compact package, this module provides a robust foundation for building efficient and space-constrained applications. It is an ideal solution for engineers looking to reduce component count, simplify assembly, and accelerate time-to-market without compromising on performance or reliability.
Key Design Advantages
- System Simplification: Integrates the rectifier, inverter, and brake circuits, significantly reducing the bill of materials (BOM) and required PCB real estate compared to a discrete component solution.
- Enhanced Thermal Performance: Built on a high-conductivity substrate, the module ensures efficient heat dissipation, allowing for more compact heatsink designs and improved operational reliability under demanding load cycles.
- Optimized Electrical Characteristics: The internal layout is engineered for low parasitic inductance, which minimizes voltage overshoots during switching and simplifies EMC/EMI filtering design.
- Proven Reliability: Leveraging Fuji Electric's established IGBT technology, the 7MBR15SC120-50 offers a long operational life and robust performance, critical for industrial environments.
Application Scenarios & Engineering Value
The integrated nature of the 7MBR15SC120-50 delivers tangible benefits across a range of applications, directly addressing common engineering pain points.
- Variable Frequency Drives (VFDs): For small VFDs (typically under 2.2 kW), this module provides the complete power stage. Its compactness is essential for developing smaller, more economical drives for pumps, fans, and conveyor systems. The integrated brake chopper simplifies the management of regenerative energy, a common requirement in dynamic load applications.
- Servo Drives: In precision motion control, rapid and accurate response is paramount. The low-loss IGBTs and soft-recovery freewheeling diodes within this module enable precise current control. This translates to smoother motor operation and higher positioning accuracy, making it a strong choice for robotic servo drives and CNC machinery.
- Industrial Automation & General-Purpose Inverters: The module’s robust construction and all-in-one design make it a versatile workhorse for various automation tasks. From packaging machines to textile equipment, it offers a reliable and easy-to-implement power conversion solution that shortens design cycles.
Technical Deep Dive: The CIB Advantage
At the core of the 7MBR15SC120-50's value is its Converter-Inverter-Brake (CIB) topology. This design philosophy goes beyond simple component integration.
First, by co-packaging the rectifier diodes and the inverter-stage IGBTs, the DC bus path is dramatically shortened. This physical proximity inherently lowers stray inductance, a primary cause of voltage spikes during high-speed switching. The result is a cleaner switching waveform, reduced stress on the semiconductor die, and a lower need for bulky external snubber circuits. Second, the module’s low collector-emitter saturation voltage, or VCE(sat), directly translates to lower conduction losses. In applications that operate at lower switching frequencies but with continuous current, this efficiency gain means less waste heat and improved overall system performance.
Key Parameter Overview
The following table outlines the critical performance specifications for the 7MBR15SC120-50. For complete electrical and thermal characteristics, it is essential to review the official product datasheet. For detailed specifications and characteristic curves, refer to the Download the 7MBR15SC120-50 Datasheet.
| Parameter | Value |
|---|---|
| Collector-Emitter Voltage (V_CES) | 1200 V |
| Collector Current (I_C) | 15 A |
| Collector-Emitter Saturation Voltage (V_CE(sat)) typ. | 2.3 V |
| Diode Forward Voltage (V_F) typ. | 2.1 V |
| Package Type | P609 (M629) |
Frequently Asked Questions (FAQ)
What are the main benefits of using a PIM like the 7MBR15SC120-50 over discrete components?
The primary benefits are reduced design complexity, faster assembly, and improved reliability. A single PIM replaces over a dozen discrete components (IGBTs, diodes, etc.), minimizing sourcing challenges and soldering points—a common source of failure. The optimized internal layout also provides superior thermal and electrical performance compared to what is typically achievable with a discrete PCB layout in the same power class.
What are the critical considerations for the gate drive design for this module?
A robust gate drive design is crucial for maximizing performance and ensuring reliability. Key considerations include providing the recommended gate-emitter voltage (typically +15V for turn-on, -8V to -15V for turn-off) to ensure full enhancement and prevent parasitic turn-on. Additionally, using short, low-inductance traces between the gate driver IC and the module pins is vital for clean switching. For a deeper understanding, review these 5 practical tips for robust IGBT gate drive design.
If your project requires a compact, efficient, and reliable power stage for a low-power motor drive or inverter, the Fuji Electric 7MBR15SC120-50 presents a compelling, integrated solution. For pricing, availability, or to discuss your specific application needs, please contact our technical team.
