Dual pre-biased transistor in a 6-pin SC-74
The Toshiba RN4606(TE85L,F) packs one NPN and one PNP pre-biased transistor into a single SC-74 (SOT-457) surface-mount package, saving board space and eliminating two external resistor pairs per channel. Each transistor integrates a 4.7kΩ base resistor (R1) and a 47kΩ emitter-base resistor (R2), setting a fixed bias network that simplifies drive design — the input can be driven directly from a 3.3V or 5V logic output without additional base current limiting. With a 50V collector-emitter breakdown and 100mA maximum continuous collector current, this part handles small-signal switching tasks in 24V industrial controls, 12V automotive body modules, and general-purpose relay or LED drive.
The 300mW total power limit (both transistors combined) sets the thermal budget.
Active lifecycle, RoHS compliant
It is also RoHS compliant, so it clears the EU regulatory gate without an exemption declaration.