INVERSE-BLOCKING TRANSISTOR MODULE

摘要

PURPOSE:To prevent overcurrent breakdown due to ununiform current by arranging pairs of positive and negative main terminals and auxiliary collector terminals of transistors and diodes symmetrically to each other on the plane of a module container. CONSTITUTION:A pair of positive main terminals A1 and A2 and a pair of negative main terminals E1 and E2 are arranged symmetrically so that main current are extracted under the same conditions from two internal transistor- diode units within an insulating container. Terminals C1 and C2 are auxiliary collector terminals led out of the points where reverse-blocking diodes FRD1 and FRD2 are connected in series to transistors Tr1 and Tr2. Accordingly, a snubber circuit and a free-wheeling diode can be arranged externally at minimum and uniform distances with respect to the internal chips and transistor and diode units. Therefore, overcurrent breakdown due to ununiform current can be prevented effectively.