The CM400E3Y6‑24NFH is a 400 A / 1200 V high-frequency IGBT half-bridge module from Mitsubishi’s NFH (Chopper) series, also marketed under Powerex. This module integrates two discrete IGBT transistors paired with fast recovery free-wheel diodes, engineered for robust high-frequency performance up to 60–70 kHz in soft-switch applications, and around 30 kHz for hard-switch scenarios. Its compact, low-inductance design and isolated baseplate simplify thermal management and heat-sink mounting.
Tailored for demanding industrial systems, the CM400E3Y6‑24NFH is well-suited for motor drives, welding equipment, induction heaters, and power supply or inverter systems. Although Mitsubishi has discontinued the NFH line, the module remains available through legacy inventories from distributors and resellers. Ideal for repairing or upgrading legacy power electronics equipment, this IGBT module offers reliable high-current switching capabilities and durable performance.
The module’s robust chopper design, combined with fast recovery diodes, supports efficient dynamic operation, reducing switching losses and improving system responsiveness. Its construction and ratings make it a go-to replacement for legacy high-power systems requiring 400 A / 1200 V switch modules. Given its obsolete status, securing remaining stock may be vital for ongoing maintenance or refurbishment projects.
