BCP51

Overview

The BCP51 is a PNP silicon power transistor manufactured by onsemi, housed in a surface-mount SOT-223 package. It features a maximum collector-emitter voltage (Vceo) of 45 V and a continuous collector current (Ic) of 1 A. The device has a power dissipation rating of 650 mW and a minimum DC current gain (hFE) of 25. It operates within a temperature range of -65°C to +150°C.

Feature Summary

• PNP silicon power transistor configuration
• Surface-mount SOT-223 packaging
• High junction temperature capability

Applications

• General-purpose amplifier circuits
• Power switching applications
• Low-voltage regulation systems

Procurement Notes

Verify the manufacturer origin carefully. While the model number is associated with onsemi, official documentation indicates NXP Semiconductors as the original designer. Confirm that the specific batch or datasheet aligns with your supply chain requirements before procurement.

Selection Notes

Select this component for low-power PNP switching tasks requiring a 1 A current capacity and 45 V blocking voltage. Ensure the thermal management design accommodates the 650 mW dissipation limit in the SOT-223 package for reliable operation at elevated temperatures.

Part Context

This component belongs to the general-purpose discrete transistor category. It serves as a fundamental building block for analog and digital switching circuits where moderate current handling and compact surface-mount integration are required.

Replacement Considerations

Consult official cross-reference data for equivalent PNP transistors in the SOT-223 package with matching 1 A and 45 V ratings.