MPSA05 MPSA55 MPSA06 MPSA56 MPSA42 MPSA92 SMD Equivalent is MMBTA05 MMBTA55 MMBTA06 MMBTA56 MMBTA42 MMBTA92 The transistor part number nomenclature are: JIS, Pro Electron, and JEDEC. IS is an acronym for Japanese Industrial Standard, and it is used in Japan, Pro Electron is a European standard. JEDEC is a North...