The Fuji 1MBI300S-120 is a single-switch IGBT module rated for 300A continuous collector current and a 1200V collector-emitter blocking voltage. Part of Fuji Electric's S-series IGBT lineup, this module integrates a high-speed IGBT chip with a co-packaged freewheeling diode in an industry-standard isolated base package. Its low V_CE(sat) and optimized switching characteristics make it a reliable choice for engineers demanding precise control, high efficiency, and thermal stability in demanding power electronic circuits operating at switching frequencies typical of industrial inverter designs.

The 1MBI300S-120 is widely deployed in AC motor drives, servo amplifiers, UPS systems, induction heating equipment, and medium-voltage inverter stages across industries including manufacturing automation, oil and gas, marine propulsion, and renewable energy. Its 1200V voltage class provides the necessary headroom for 690V AC bus applications, while the 300A current rating supports high-torque motor control and heavy industrial loads. Replacement demand is strong in legacy drive platforms where the original Fuji module remains the preferred or required drop-in solution.

Quick Reference: 1MBI300S-120

Key Features of the 1MBI300S-120:

• 1200V V_CE blocking voltage with high avalanche ruggedness suited for 690V AC systems
• 300A rated collector current with low V_CE(sat) for reduced conduction losses at full load
• Integrated co-packaged anti-parallel freewheeling diode for simplified inverter leg design
• Isolated copper base plate construction for direct mounting to heatsinks with standard thermal interface materials
• Optimized IGBT switching speed balancing low turn-off losses against dV/dt and EMI constraints
• Compatible with standard Fuji S-series gate drive requirements, simplifying drop-in replacement in existing drive platforms

With a current factory production lead time of 99 weeks, procuring the 1MBI300S-120 through standard distribution channels can mean critical equipment sits idle for nearly two years. For maintenance teams managing aging drive systems or procurement professionals protecting uptime on active production lines, that wait is not acceptable. ATI Accurate Technology maintains ready inventory of hard-to-find, long-lead-time, and obsolete IGBT modules precisely to close this gap. Our stock is sourced as new OEM product, allowing you to restore equipment quickly without qualification risk or the uncertainty of aftermarket alternatives.

ATI Accurate Technology is based in Palmetto, Florida, and ships same-day on orders placed before 5PM EST. Whether you need a single replacement module or volume quantities for a maintenance spares program, our team is ready to help. Contact us at 239-734-7566 or sales@igbts.us for pricing, lead time confirmation, and volume discount options. We specialize in IGBTs, thyristors, diodes, and rectifier modules — stocked and ready when your schedule demands it.