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The Diotec Semiconductor BC858A is a general-purpose PNP small-signal transistor housed in an SOT-23 surface-mount package. It features a collector-emitter voltage (VCEO) of 65 V, a collector-base voltage (VCBO) of 80 V, and an emitter-base voltage (VEBO) of 5 V. The device supports a continuous DC collector current of -100 mA with a peak current rating of 200 mA. Total power dissipation is rated at 300 mW when mounted on a PCB with the minimum recommended pad layout. The junction temperature range spans from -55°C to +150°C.
Verify the specific ordering suffix to confirm the intended grade. The absence of a suffix indicates industrial grade availability. A suffix of -C denotes commercial grade, while -Q signifies AEC-Q101 compliance and -AQ indicates AEC-Q101 qualification. Confirm that the required reliability level matches the selected grade before procurement.
Select this component for standard commercial or industrial applications requiring a PNP transistor with a 65 V collector-emitter breakdown. Ensure the design accommodates the specified thermal resistance values based on the chosen package mounting style. Verify that the required current gain falls within the available Group A, B, or C specifications provided in the datasheet.
This part belongs to the BC856...BC860 series of SMD universal PNP transistors manufactured by Diotec Semiconductor. The series includes complementary NPN counterparts such as the BC846 through BC850. These devices are designed for general-purpose use in surface-mount technology environments, offering standardized electrical characteristics across multiple gain groupings.
Compatible parts include the BC857A and BC859A from the same manufacturer family.