bc303Part #: BC303 ; Part Category: Transistors ; Manufacturer: STMicroelectronics, Inc. ; Description: Small Snal Bipolar Transistor, 0.5A I(C), 60V V(BR)CEO, 1The 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 .