NTE Electronics NTE196 NPN Silicon Complementary Transistor, Audio Power Output and Medium Power Switching, 90V, 7 Amp: Electronic Components: Amazon.com: Industrial & Scientific
Amazon.com: Npn Transistor, NPN Transistors Transistor Assortment for Industry for Plug Transistor for 2n3904 Npn Transistor for PNP Transistor : Industrial y Científico
2N3904 NPN Small Signal Transistor: Electronics: Amazon.com: Industrial & Scientific