Dual NPN/PNP in a single SOT-363 — what the 65 V, 100 mA, 250 MHz ratings mean
The Infineon BC 846PN H6727 is a dual complementary transistor pair — one NPN and one PNP — housed in a single 6-VSSOP / SOT-363 package (PG-SOT363-PO). The 65 V collector-emitter breakdown voltage and 100 mA maximum collector current cover low-to-medium power loads such as relay drivers, signal-level inverters, and VHF oscillators up to 250 MHz transition frequency. DC current gain is specified at a minimum of 200 at 2 mA collector current and 5 V Vce, giving consistent drive capability across the linear region. Saturation voltage is 650 mV maximum at 5 mA base current and 100 mA collector current, which keeps conduction losses low in saturated switching. Maximum power dissipation is 250 mW, and the junction temperature rating of 150°C allows operation in elevated ambient environments typical of automotive under-hood or industrial enclosures, provided the board layout handles the thermal budget.
For new designs, a pin-compatible dual NPN/PNP transistor in SOT-363 from another manufacturer should be evaluated; the BC 847 series is a common cross-shop candidate but differs in Vceo rating (45 V vs 65 V) and should be verified against the application's voltage headroom. No last-time-buy window applies — the part is already in the surplus channel.