The directory contains all the main categories of transistors: bipolar silicon and germanium transistors, pre-biased bipolar transistors, junction and metal-oxide-semiconductor field effect transistors (MOSFET), insulated-gate bipolar transistors (IGBT). There are also transistor assemblies: dual bipolar transistor, dual pre-biased bipolar transistors, dual-channel mos-field effect transistors (MOSFET) and dual-channel insulated-gate bipolar transistors (IGBT). The directory provides two ways to