bc303The complementary NPN transistor to the BC303 is the BC301. Replacement and Equivalent for BC303 transistor You can replace the BC303 with the 2N5323 , BC161 or BC461 .THE BC303, BC304 ARE PNP SILICON PLANAR EPITAXIAL. TRANSISTORS RECOMMENDED BC303 only. 85. V. Collector Cutoff Current. Emitter Cutoff Current.