PNP switching transistor for general-purpose and driver circuits
The Infineon BC807-25B5000 is a PNP epitaxial planar transistor in a SOT-23-3 surface-mount package, rated for 45 V collector-emitter breakdown and 500 mA continuous collector current. It delivers a minimum DC current gain of 160 at 100 mA collector current and 1 V VCE, with a transition frequency of 200 MHz. The 330 mW power dissipation limit sets the thermal budget for this small-signal device. Typical applications include general-purpose switching, driver stages for relays and solenoids, and load switching in low-power DC rails.
The 45 V VCEO rating covers most 12 V and 24 V industrial and automotive auxiliary rails with margin for transients. The 500 mA continuous collector current suits driving small relays, indicator LEDs, or base drive for larger power transistors. Saturation voltage is specified at 700 mV maximum with 50 mA base current and 500 mA collector current, so confirm base drive headroom if switching near the current limit. The 200 MHz transition frequency indicates adequate speed for low-frequency PWM up to a few hundred kilohertz. For higher-speed switching, compare the fT against your required rise and fall times.
SOT-23-3 footprint and bulk packaging
The SOT-23-3 package is a standard small-signal footprint shared across the BC807 family.