This part is a kind of semiconductor called MIG20J503H.

Function of this product has Intelligent Power Module.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

TOSHIBA Intelligent Power Module MIG20J503H MIG20J503H MIG20J503H is an intelligent power module for three-phase inverter system. The 4th generation low saturation voltage trench gate IGBT and FRD are connected to a three-phase full bridge type, and IC by the original high-voltage SOI (silicon-on-insulator) process drives these directly in response to a PWM signal. Moreover, since high-voltage level-shifter is built in high-voltage IC, while being able to perform a direct drive without the interface with which the upper arm IGBT is insulated, the drive power supply of an upper arm can be driven with a bootstrap system, and the simplification of a system is possible. Furthermore, each lower arm emitter terminal has been independent so that detection can perform current detectio [ ... ]

MIG20J503H PDF Datasheet Download