BCX51-16-QX

Overview

The Nexperia BCX51-16-QX is a PNP medium power transistor in the AEC-Q101 qualified BCX51-Q series. It utilizes a SOT89 surface-mount package with an exposed heatsink for thermal management. Key electrical parameters include a collector-emitter voltage (VCEO) of -45 V, a continuous collector current (IC) of -1 A, and a peak collector current (ICM) of -2 A. The DC current gain (hFE) ranges from 100 to 250 at VCE = -2 V and IC = -150 mA. Total power dissipation reaches 1.35 W on a 6 cm² copper pad, with a junction temperature limit of 150 °C.

Feature Summary

• Qualified according to AEC-Q101 standards for automotive applications
• Features an exposed heatsink for excellent thermal and electrical conductivity
• Provides three distinct current gain selections for design flexibility
• Supports high collector current capability up to 1 A

Applications

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

Procurement Notes

Verify the specific ordering suffix matches the required gain bin and packaging format. Confirm that the component meets the AEC-Q101 qualification requirements for your target automotive application. Ensure the PCB footprint aligns with the SOT89 dimensions provided in the datasheet. Check for any RoHS compliance documentation if required by your supply chain standards.

Selection Notes

Select this component when a PNP transistor with 45 V rating and 1 A current capacity is needed in a compact SMD package. The exposed pad design requires careful thermal consideration during PCB layout. Verify that the hFE range of 100 to 250 fits your circuit's biasing requirements. Consider the peak current capability of 2 A for transient load conditions.

Part Context

This device belongs to the BCX51-Q series, which includes complementary NPN types like the BCX54-Q. The series is designed for robust performance in automotive environments. The BCX51-16 variant specifically offers a higher minimum current gain compared to the BCX51-10 version. All variants share the same physical package and general electrical limits.

Replacement Considerations

Direct substitutes within the same family include BCX51-10-Q or BCX51-Q, noting differences in current gain specifications. Cross-reference with other manufacturers' SOT89 PNP transistors rated for 45 V and 1 A, ensuring pinout compatibility and thermal resistance values match your design constraints.