FUJI ELECTRIC – 1MBI400S-120 – IGBT Power Module – 1200V 400A – Reclaimed Part

Fuji Electric — 1MBI400S-120 IGBT Module 1200 V • 400 A • Single IGBT (1-in-1) with Freewheel Diode • Isolated Baseplate

What it is

The Fuji Electric 1MBI400S-120 is a high-power 1200 V, 400 A-class single IGBT module from Fuji Electric’s S-Series. Its 1-in-1 configuration combines a high-current IGBT with an integrated reverse-connected freewheel diode in a low-inductance, electrically isolated power module.

Designed for high-speed industrial power switching, the 1MBI400S-120 is used in motor-drive inverters, AC and DC servo amplifiers, uninterruptible power supplies and industrial equipment such as welding machines. The isolated baseplate provides a direct thermal interface to the heatsink while maintaining electrical isolation from the power terminals.

At-a-Glance

• Voltage Rating: 1200 V V_CES
• Collector Current: 400 A @ T_C = 80°C; 600 A @ T_C = 25°C
• Pulse Current: 800 A @ T_C = 80°C; 1200 A @ T_C = 25°C, 1 ms
• Configuration: Single IGBT, 1-in-1 package
• Freewheel Diode: Integrated reverse-connected diode
• Isolation: 2500 V AC for 1 minute
• Applications: Motor drives; servo amplifiers; UPS systems; industrial power converters; welding equipment
• Condition: Reclaimed part

Features

• High-speed switching — designed for demanding inverter and industrial switching applications.
• Voltage-controlled gate — standard IGBT gate-drive architecture with ±20 V maximum gate-emitter rating.
• Low-inductance construction — Fuji S-Series module structure minimizes internal parasitic inductance.
• High current capability — rated for 400 A continuous operation at an 80°C case temperature.
• Integrated freewheel diode — provides the reverse-current path required for inductive switching applications.
• Isolated baseplate — simplifies heatsink installation and electrical isolation.

Technical Specifications

Compatibility / Representative Uses