The Fuji 1MBI300N-120 is a single N-channel Insulated Gate Bipolar Transistor (IGBT) module rated at 300A collector current and 1200V collector-emitter breakdown voltage. Combining the high input impedance of a MOSFET gate with the low on-state conduction losses of a bipolar transistor, this module is engineered for demanding high-frequency, high-power switching environments. Its robust single-switch configuration simplifies circuit design while delivering reliable thermal performance and switching efficiency in systems where precise power control is critical.

The 1MBI300N-120 is well suited for industrial AC motor drives, servo amplifiers, UPS systems, induction heating equipment, and medium-voltage inverter stages. Its 1200V voltage rating provides the necessary headroom for 690V AC bus applications, while the 300A current capability supports substantial motor loads and high-throughput power conversion stages. Maintenance engineers replacing failed switching devices in legacy drive platforms will find this module a direct fit, and its standardized single-module topology eases integration into existing power stage designs without requiring layout modifications.

Quick Reference: 1MBI300N-120

Key Features of the 1MBI300N-120:

• 300A continuous collector current (I_C) for high-power switching stages
• 1200V collector-emitter breakdown voltage (V_(BR)CES), suitable for 690V AC bus applications
• Single N-channel IGBT configuration for simplified gate drive design and direct drop-in replacement
• Insulated gate structure provides voltage-controlled switching with minimal drive power requirements
• Low saturation voltage (V_CE(sat)) characteristic of Fuji IGBT technology reduces conduction losses in continuous-duty applications
• Isolated baseplate construction supports standard heatsink mounting and thermal management in enclosed drive cabinets

The 1MBI300N-120 has been discontinued by Fuji Electric, and new production is no longer available through standard distribution channels. For procurement teams supporting aging drive platforms or managing critical spares inventory, this creates real exposure — a single failed module can halt production with no clear factory replenishment path. ATI Accurate Technology specializes in exactly this challenge, maintaining stock of obsolete and long-lead-time power semiconductors so engineers and buyers can source what they need without waiting on allocation queues or redesigning around substitute parts.

ATI Accurate Technology is located in Palmetto, Florida, and stocks a broad range of obsolete and hard-to-find IGBTs, thyristors, diodes, and rectifier modules. Orders placed before 5PM EST ship same day. Contact our team directly for availability confirmation, datasheet support, and volume pricing on the 1MBI300N-120 or related Fuji power modules. Call 239-734-7566 or email sales@igbts.us — we respond fast and keep engineers moving.