PNP pre-biased transistor with integrated 2.2 kΩ / 10 kΩ resistors
The Toshiba RN2415,LXHF is a PNP pre-biased transistor — a digital transistor that integrates a 2.2 kΩ base resistor (R1) and a 10 kΩ emitter-base resistor (R2) into a single SOT-23-3 package. This eliminates two external resistors from the BOM, saving placement cost and board area in automotive signal-switching and interface circuits. Rated for 50 V collector-emitter breakdown and 100 mA continuous collector current, with a 200 MHz transition frequency, it handles low-side switching, level translation, and relay/load driver pre-drive in 12 V and 24 V automotive environments.
AEC-Q101 — built for automotive reliability programs
For a procurement buyer, that qualification is the gate for PPAP submission — a non-qualified part won't get signed off for an ECU BOM.
200 mW power dissipation in a SOT-23-3 — thermal reality
The 200 mW power limit in the SOT-23-3 (SC-59) package sets the practical current ceiling. At 100 mA continuous with a 300 mV Vce(sat), the die dissipates 30 mW — well within the budget. But if the transistor is driving a relay coil or an LED string at higher duty cycles, the junction temperature rise from the 200 mW ceiling needs a quick thermal check against the ambient. For most automotive signal loads (gate pre-drive, sensor pull-down, logic-level translation), the margin is comfortable.