Fuji Electric 7MBI50N-120 IGBT Module 50A 1200V | Replacement, Equivalent & Selection Guide
The Fuji Electric 7MBI50N-120 is a high-performance 6-in-1 IGBT power module rated at 50A / 1200V, designed for demanding industrial inverter and drive applications. This page provides full technical specifications, compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
- Part Number: 7MBI50N-120
- Manufacturer: Fuji Electric
- Series: N-Series (7MBI)
- Configuration: 6-in-1 (Three-Phase Bridge)
- Collector-Emitter Voltage (VCES): 1200 V
- Collector Current (IC): 50 A (DC)
- Gate-Emitter Voltage (VGES): ±20 V
- Saturation Voltage (VCE(sat)): ≤ 2.5 V (typ.)
- Switching Frequency: Up to 20 kHz
- Operating Temperature (Tj): -40°C to +150°C
- Isolation Voltage: 2500 V AC (1 min)
- Package: Fuji N-Series module (screw terminal)
- Weight: Approx. 1580 g (module assembly)
- RoHS Compliant: Yes
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as drop-in or functional replacements for the 7MBI50N-120. Always verify pinout, gate drive requirements, and thermal interface before substitution.
- Fuji Electric 7MBI50N-120-01 — Updated revision of the same series; direct replacement in most designs
- Mitsubishi CM50E3Y-12E — 50A / 1200V 6-in-1 IGBT; compatible footprint in many inverter platforms
- Infineon FS50R12KE3 — 50A / 1200V EconoPACK; functional equivalent, verify gate resistor values
- Semikron SKM50GB12T4 — 50A / 1200V SEMITRANS; cross-reference for European OEM equipment
- IXYS MWI50-12A7 — 50A / 1200V 3-phase bridge; alternative for retrofit applications
Note: Konmask.com recommends engineering validation before any substitution in safety-critical systems.
Why Choose the Original 7MBI50N-120
- OEM-Matched Performance: Guaranteed to meet original equipment specifications without re-tuning gate drive circuits
- Proven Reliability: Fuji Electric N-Series modules are field-proven in millions of VFD and servo drive installations worldwide
- Thermal Consistency: Matched thermal resistance (Rth(j-c)) ensures predictable heatsink design and derating curves
- Warranty & Traceability: Genuine parts supplied with full manufacturer traceability and date codes
- Reduced Commissioning Risk: No firmware or parameter changes required when replacing like-for-like
Typical Applications
- Variable Frequency Drives (VFD) / AC Motor Drives — 15–22 kW range
- Servo Drive Inverter Stages
- Industrial UPS and Power Conditioning Systems
- Elevator and Crane Drive Controllers
- CNC Machine Tool Spindle Drives
- Solar Inverters and Energy Storage Systems (ESS)
- Welding Power Supplies
System Compatibility
The 7MBI50N-120 is widely used in equipment from the following OEM platforms:
- Fuji Electric: FRENIC-Multi, FRENIC-Ace, FRENIC-MEGA series drives
- Yaskawa: G7, F7, E7 series (verify current rating and gate drive voltage)
- Mitsubishi: FR-A700, FR-E700 series (cross-reference required)
- Siemens: MICROMASTER 440 / SINAMICS G120 (functional cross, verify pinout)
- ABB: ACS550, ACS800 series (engineering review required)
Selection Guide
Use the following criteria to confirm the 7MBI50N-120 is the correct module for your application:
- Step 1 — Voltage Class: Confirm DC bus voltage. For 3-phase 380–480 V AC input, a 1200 V IGBT class is standard.
- Step 2 — Current Rating: Match to motor rated current × 1.5–2× derating factor. 50 A suits approximately 15–22 kW drives.
- Step 3 — Configuration: Confirm 6-in-1 (three-phase bridge) topology matches your PCB layout.
- Step 4 — Package & Pinout: Verify screw terminal positions and mounting hole pattern against your heatsink/PCB.
- Step 5 — Gate Drive: Confirm gate voltage ±15 V and gate resistor values are compatible.
- Step 6 — Thermal Budget: Calculate junction temperature under worst-case load using Rth(j-c) from the datasheet.
Quality Assurance & Sourcing
- Source: Authorized distribution channels and verified surplus stock with full traceability
- Inspection: Each unit undergoes visual inspection and basic electrical verification before shipment
- Packaging: Anti-static ESD packaging with foam cushioning for safe international transit
- Documentation: Certificate of conformance and date code records available on request
- Lead Time: In-stock items ship within 1–3 business days; contact us for bulk order scheduling
How to Order
- Add the 7MBI50N-120 to your cart and proceed to checkout
- For bulk orders (>5 units), contact support@konmask.com for volume pricing
- Provide your application details for a free compatibility review before purchase
- International orders: DHL / FedEx express available — typical delivery 5–10 business days
Replacement & Compatibility FAQ
Q: Can I replace 7MBI50N-120 with 7MBI50N-120-01?
A: Yes. The -01 suffix denotes a minor revision with improved switching characteristics. It is a direct drop-in replacement in virtually all applications.
Q: Is the Mitsubishi CM50E3Y-12E a direct replacement?
A: Electrically compatible in most cases, but the physical footprint and terminal layout differ. PCB or busbar modification may be required.
Q: What gate drive voltage does the 7MBI50N-120 require?
A: Standard ±15 V gate drive. Maximum VGES is ±20 V — do not exceed this rating.
Q: Do you provide datasheets?
A: Yes. Contact support@konmask.com with your order number or inquiry and we will provide the official Fuji Electric datasheet.
Q: Can this module be used in a solar inverter?
A: Yes, provided the DC bus voltage and switching frequency requirements are within the module’s rated parameters. Consult our technical team for application-specific guidance.
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