Pre-biased NPN in a SOT-23 — what the integrated resistors mean
It integrates two 10 kOhm resistors — one in series with the base (R1) and one between base and emitter (R2) — eliminating the need for external bias components in low-side switching and driver applications.
NRND status — plan your BOM transition
For new designs, Infineon's current pre-biased transistor portfolio — parts sharing the same SOT-23 footprint and 10 kOhm resistor values — should be evaluated as a form-fit-function replacement.
200 mW power limit and thermal derating
The 200 mW maximum power dissipation is the thermal ceiling for the SOT-23 package. In practice, ambient temperature derating applies — at 85 °C the allowable dissipation drops significantly, so the load current and duty cycle must be checked against the thermal resistance of the board. For continuous 100 mA collector current, the VCE(sat) of 300 mV at 10 mA gives a rough dissipation of 30 mW under saturation, leaving headroom; linear-mode operation at higher VCE will consume the budget quickly.