For each hero part, list 20–30 originals it replaces. That is your .
Without the equivalent book's methodology (matching, pairing, thermal tracking), the repair would fail.
NPN or PNP for bipolar junction transistors (BJTs); N-channel or P-channel for field-effect transistors (FETs). Maximum Ratings: Breakdown voltages ( VCEOcap V sub cap C cap E cap O end-sub VCBOcap V sub cap C cap B cap O end-sub ), maximum collector current ( ICcap I sub cap C ), and power dissipation ( PDcap P sub cap D Performance Characteristics: Current gain ( hFEh sub cap F cap E end-sub ) and transition frequency ( fTf sub cap T
These books analyze several critical parameters to determine compatibility: Silicon (Si) or Germanium (Ge).