BDX54/A/B/C is a PNP silicon transistor produced by Fairchild Semiconductor International. Its maximum collector-emitter reverse voltage (VCEO) and maximum collector-emitter voltage (VCE) are respectively -100V and -80V, maximum collector-base reverse voltage (VCBO) is -100V, and maximum emitter-base voltage (VEBO) is -5V. The maximum DC collector current (IC) of the transistor is -8A, the maximum pulse collector current (ICP) is -12A, the maximum base current (IB) is -0.2A, the maximum collector power dissipation (PC) is 60W, and the junction temperature is 150 °C. The storage temperature is -65 to 150 °C.