A 2.5kV-1.8kA advanced type Power Pack IGBT has been developed by use of our original multi-collector structure. From this multi-collector structure, we can drastically reduce the thermal stress occurring during the power cycling test. In addition to the mechanical ruggedness, the high turn-off capability of Ic=6600A, Vc(peak)=2400V,Tj=125 degrees C and the wide SCSOA of Vcc=1800V, Ic=10000A, Tj=125 degrees C,tw=15 mu s are realized. These high electrical ruggedness come from decreasing the imbalance operation among chips.