RN1901FE to RN1906FE Bipolar Transistors Silicon N.
Toshiba
RN1905FE - Silicon NPN Epitaxial Type Transistors
RN1901FE to RN1906FE Bipolar Transistors Silicon NPN Epitaxial Type (PCT Process)(Bias Resistor built-in Transistor) RN1901FE/02FE/03FE/04FE/05FE/06FE.