Pre-biased NPN for simplified switching
The Toshiba RN1115,LF(CT is an NPN pre-biased transistor in a SC-75 (SOT-416) surface-mount package. The integrated bias resistors — 2.2 kOhms base (R1) and 10 kOhms emitter-base (R2) — eliminate two external resistors from the BOM, saving board space and placement cost in high-volume switching applications.
250 MHz transition frequency — what it buys you
With a transition frequency of 250 MHz, this part switches cleanly at speeds well above what a general-purpose 150 MHz transistor manages. That margin matters when the collector drives a clock line, a serial data buffer, or a low-power RF stage up to low-VHF frequencies. The 300 mV saturation voltage at 250 µA base / 5 mA collector keeps on-state losses low in battery-powered designs.
It is ROHS3 compliant.