Dual complementary pre-biased pair for automotive switching
The Toshiba RN4908FE,LXHF(CT is an automotive-grade dual transistor combining one NPN and one PNP pre-biased device in a single SOT-563 / SOT-666 package. Each transistor integrates a 22 kΩ base resistor (R1) and a 47 kΩ emitter-base resistor (R2), eliminating the need for external bias components in switching and inverter stages.
Integrated resistor network saves board space
The built-in 22 kΩ base and 47 kΩ emitter-base resistors set a fixed bias point that simplifies BOM consolidation — no separate resistor pair is needed per transistor. The complementary NPN/PNP pair suits half-bridge or push-pull output stages where the two devices share a common bias network. With a minimum DC current gain (hFE) of 80 at 10 mA collector current and 5 V VCE, the part delivers consistent drive capability across the automotive temperature range.
AEC-Q101 qualification and active lifecycle
For buyers managing automotive BOM lines, the active lifecycle removes the risk of forced last-time-buy purchases.
SOT-563 footprint for dense PCB layouts
The SOT-563 / SOT-666 package (supplier device code ES6) occupies roughly half the board area of two separate SOT-23 pre-biased transistors. The surface-mount footprint suits automated pick-and-place assembly and reflow soldering. Maximum power dissipation is 100 mW total for the dual device — thermal management in the layout should account for the shared package when both transistors conduct simultaneously.