The Fuji 1MBI300NN-120 is a single-switch IGBT module from Fuji Electric's NN-series platform, delivering a 300A continuous collector current rating and 1200V collector-emitter voltage. Built for high-frequency switching in three-phase inverter topologies, this module integrates a fast-recovery freewheeling diode and offers low saturation voltage characteristics that reduce conduction losses in continuous-duty cycles. Its robust isolated base plate construction supports reliable thermal transfer to external heatsinks, making it a dependable building block in industrial power conversion equipment where thermal management and switching performance are equally critical.

The 1MBI300NN-120 is deployed across a broad range of industrial power electronics applications, including AC motor drives, servo amplifiers, UPS systems, induction heating equipment, and traction converters. At 300A and 1200V, this module occupies a performance tier suited for medium-to-large horsepower variable frequency drives and regenerative drive systems. Its switching characteristics are well-matched to carrier frequencies common in industrial servo and spindle drive platforms, and it has seen widespread use in OEM equipment from machine tool builders, elevator drive manufacturers, and industrial automation integrators worldwide.

Quick Reference: 1MBI300NN-120

Key Features of the 1MBI300NN-120:

• 300A continuous collector current (IC) with 1200V collector-emitter voltage (VCES) for high-power inverter stages
• Low VCE(sat) reduces on-state conduction losses in high duty-cycle and continuous-load applications
• Integrated fast-recovery freewheeling diode eliminates the need for external anti-parallel diodes
• Isolated copper base plate design enables direct mounting to standard heatsink assemblies with controlled interface thermal resistance
• Gate drive compatibility with standard IGBT driver ICs and gate resistor tuning for switching loss optimization
• Fuji NN-series construction provides consistent switching behavior across operating temperature range, supporting predictable thermal derating curves

The 1MBI300NN-120 is a factory-obsolete component with new production lead times reaching 99 weeks — effectively making open-market inventory the only viable sourcing channel for most applications. Engineers maintaining legacy drive systems or procuring replacement modules for installed equipment cannot afford to wait on factory production schedules. ATI Accurate Technology actively stocks hard-to-find and obsolete IGBT modules specifically to support these maintenance and production continuity requirements. If you are evaluating cross-reference options or need to confirm functional compatibility with your platform, our technical team can assist.

ATI Accurate Technology is a power semiconductor distributor located in Palmetto, Florida, specializing in IGBTs, thyristors, diodes, and rectifier modules including obsolete and long-lead-time parts. We ship same day on orders received before 5PM EST. Contact us for volume pricing, availability confirmation, or technical support: call 239-734-7566 or email sales@igbts.us.