Bipolar Transistors (BJT)

Bipolar junction transistors (BJT) of NPN and PNP polarity for general and special use: small-signal (BC547, BC557, 2N2222, 2N3904), medium-power (BD139, BD140, TIP31, TIP32), and high-power (2N3055, MJE13007, BU406, MJL21194). Packages TO-92, TO-126, TO-220, TO-247, TO-3, SOT-23, SOT-89. Filter by Vceo, Ic, hFE, Pd, fт, and package. Used in audio amplifiers, switching stages, oscillators, relay drivers, CRT horizontal scan, inverters, and PWM stages.