BCX51-16,135

Overview

The BCX51-16,135 is a PNP medium power transistor from the Nexperia BCP51/BCX51 series, housed in an SOT89 (SC-62) surface-mounted plastic package. It features a collector-emitter voltage of -45 V and a continuous collector current of -1 A. The device supports peak collector currents up to -2 A for single pulses under 1 ms. DC current gain selection group -16 provides a minimum hFE of 100 at IC = -150 mA. Key electrical characteristics include a transition frequency of 145 MHz and a collector-emitter saturation voltage of -0.5 V at IC = -500 mA. Total power dissipation reaches 1.35 W on a PCB with a 6 cm² collector pad.

Feature Summary

• High current capability suitable for medium power applications
• Three distinct current gain selections for precise circuit design
• Exposed heatsink in the SOT89 package for efficient thermal transfer
• Qualified for automotive applications per AEC-Q101 standards

Applications

• Linear voltage regulators
• High-side switches
• Battery-driven devices
• Power management circuits
• MOSFET drivers

Procurement Notes

Verify the specific ordering suffix matches the required tape-and-reel configuration. Confirm the hFE selection group corresponds to the design requirements. Ensure compatibility with the specified SOT89 footprint dimensions during PCB layout. Check the most recent datasheet revision for any updates to limiting values or thermal characteristics before finalizing the bill of materials.

Selection Notes

Select this component when a PNP transistor with high current handling and robust thermal performance in an SMD package is required. The exposed collector pad in the SOT89 package facilitates heat dissipation compared to standard three-lead packages. Consider the available hFE bins if tight gain control is necessary for amplifier stages. Verify that the operating temperature range aligns with the application environment constraints.

Part Context

This part belongs to the BCP51/BCX51/BC51PA family of PNP medium power transistors manufactured by Nexperia. The series offers variants in different packages, including SOT223 and SOT1061, while maintaining consistent electrical ratings. The BCX51 variant specifically utilizes the SOT89 package, which balances power handling with compact surface-mount form factors for industrial and consumer electronics.

Replacement Considerations

The BCX54 is the NPN complement within the same product family. Designers requiring an NPN equivalent should verify pinout compatibility and thermal characteristics. Other general-purpose PNP transistors may serve as substitutes if current and voltage ratings are sufficient, but package-specific thermal performance will differ.