The MSC72166 is Designed for High Power Pulsed IFF Avionics Applications. PACKAGE STYLE .400X.500 COMMON BASE MAXIMUM RATINGS IC VCC PDISS TJ TSTG θJC O O 40 A 50 V 1350 W @ TC = 25 C -65 C to +200 C -65 C to +150 C 0.06 C/W O O O O 1 = COLLECTOR 2 & 4 = BASE 3 = EMITTER CHARACTERISTICS SYMBOL.