IRG4PH50UDPbF V g G AT E SIG NAL D E V IC E U N D E R T E S T C U R R E N T D .U .T . V O LT A G E IN D .U .T . C U R R E N T IN D 1 t0 t1 t2 Figure 18e. Macro Waveforms for Figure 18a's Test Circuit L D.U.T.800VRL= 4 X I 1000V V * C @25°C c 0 - 800V 50V 600 0µF 100V Figure 19. Clamped Inductive Load Test Circuit Figure 20. Pulsed Collector Current Test Circuit www.irf.com 9