I am repairing a UPS system which inverter IGBT using 2MBI150N-120 (150A 1200V) was found faulty,and I just have 2MBI150N-060(150A 600V) in stock,do you think that I can use 2MBI150N-060 instead of 2MBI150N-120?The DC rectifier Voltage produced to the IGBT pins C1 & E2 is just 435Vdc.Thanks!!!!