The BCR 133F B6327: Infineon has marked the BCR 133F as obsolete.
50 V, 100 mA — the switching headroom
With a collector-emitter breakdown of 50 V and a maximum collector current of 100 mA, this part handles low-side switching in 12 V and 24 V industrial logic circuits, relay drivers, and small-signal loads. The 130 MHz transition frequency keeps switching edges clean for sub-1 MHz PWM or data-line buffering. The built-in 10 kΩ base and 10 kΩ base-emitter resistors eliminate two external passives per transistor — a board-space win in dense SOT-723 layouts.
PG-TSFP-3 footprint — SOT-723 land pattern
The supplier device package is PG-TSFP-3, which maps to the standard SOT-723 footprint. That 1.2 mm × 1.2 mm body with 0.4 mm pitch is common among pre-biased transistors from multiple manufacturers, so a replacement search should start with parts in that same land pattern. The surface-mount assembly is straightforward for reflow, though the small pad area means the 250 mW power limit is the real thermal ceiling — no heatsinking is practical at this scale.