Pre-biased NPN – what the integrated resistors save you
The Toshiba RN1417(TE85L,F) is an NPN pre-biased transistor in a three-pin S-Mini (SOT-23-3) surface-mount package. It integrates a 10 kΩ base resistor (R1) and a 4.7 kΩ emitter-base resistor (R2) on-chip, so you can drive the base directly from a logic output without adding external bias components. That cuts the placement count and shrinks the board area for high-density designs.
The 250 MHz transition frequency keeps switching edges clean for PWM up to a few megahertz. Saturation voltage is 300 mV at 5 mA collector current with 250 µA base drive, so the on-state loss stays low in saturated switching.
Toshiba lists the RN1417(TE85L,F) as Active with RoHS compliance.
