Integrated IGBT modules package one or more Insulated Gate Bipolar Transistors — with freewheeling diodes almost always included — into a single isolated power package. The device combines the voltage-controlled gate drive of a MOSFET with the high-current, high-voltage capability of a bipolar transistor, which is why IGBTs became the dominant switching device for motor drives and inverters from a few kilowatts up to several megawatts. Unlike a MOSFET, an IGBT has a bipolar output stage and exhibits tail current at turn-off, so switching frequency is bounded — typically 1 to 20 kHz in practice — which shapes the gate drive design and heatsink selection from the start.

Module topology follows the application. Half-bridge modules suit chopper stages and single inverter legs. A six-pack — three half-bridges in one housing — is the standard for three-phase AC motor drives, putting a complete inverter bridge into a single footprint. Intelligent power modules go further, integrating gate drivers, short-circuit protection, under-voltage lockout, and over-temperature sensing in one package; the tradeoff is less flexibility, but the gate drive board gets much simpler. EconoPACK and HiPak packages handle higher bus voltages and currents; press-pack construction takes over at the top end where clamped mounting and double-sided cooling are needed.

Voltage selection follows the DC bus. A 600V device is correct for a 400VAC drive after rectification; 1200V for 690VAC systems; 1700V and 3300V modules are for traction converters and grid-tied applications. Current rating, thermal resistance junction-to-case, and switching frequency ceiling all have to land together — a module that handles the RMS current but can't dissipate heat fast enough will still fail.

TRX sources IGBT modules from Infineon (EasyPACK, HiPak), ON Semiconductor, Mitsubishi Electric, and STMicroelectronics through authorised distribution. No minimum order, so you can qualify a topology before committing to production volumes. In-stock lines ship to Johannesburg, Cape Town, Durban, and Pretoria. For parts that need to be sourced, we'll give you an actual lead time.

Send us your part number or describe the drive — bus voltage, output power, topology — and we'll come back with availability and pricing.