Nexperia USA Inc. PXTA92-QX

Overview

PXTA92-QX from Nexperia is a PNP high-voltage bipolar junction transistor in SOT89 package, rated for −300 V V_CEO, −100 mA I_C, and 1.3 W P_tot at T_amb ≤ 25 °C; it serves as a robust switching element in automotive HID front lighting, LED chain drivers, and SMPS high-side control stages.

For engineers reviewing the PXTA92-QX datasheet, PXTA92-QX pinout, PXTA92-QX application, or PXTA92-QX equivalent, key selection criteria include verified AEC-Q101 qualification, −300 V breakdown margin, thermal resistance R_th(j-sp) = 16 K/W, and confirmed SOT89 mechanical compatibility with FR4 PCB mounting pads.

Technical Context

This PNP transistor operates in linear or saturated switching mode with DC current gain h_FE ≥ 40 at V_CE = −10 V and I_C = −10 mA, and supports peak collector current up to −200 mA. Its low V_CE(sat) ≤ −500 mV at I_C = −20 mA / I_B = −2 mA enables efficient power-stage conduction.

Designed for high-voltage isolation, it features V_CBO = −300 V and V_EBO = −5 V, with leakage currents ICBO ≤ −250 nA and IEBO ≤ −100 nA at 25 °C - critical for stable operation in fluorescent ballasts and telecom hook-switch circuits.

Key Specifications

Pinout & Package

SOT89 (SC-62) plastic surface-mount package: 3-lead, 1.5 mm pitch, 4.5 mm × 2.5 mm × 1.5 mm body; collector tab thermally and electrically connected to Pin 2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Compared with BCP56-10Q and PN2907A, PXTA92-QX uniquely delivers −300 V capability in SOT89 with AEC-Q101 compliance - making it the sole option among the three for automotive HID and 277 V AC-powered lighting systems requiring both high breakdown and production-grade reliability.

Availability

PXTA92-QX is available at Aetrix Electronics and suitable for electronic ballasts, automotive HID lighting, and switch-mode power supplies requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for PXTA92-QX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on essential efficiency-enhancing components, with leadership in logic, discrete, and MOSFET technologies for automotive, industrial, and consumer markets.

PXTA92-QX belongs to Nexperia's AEC-Q101-qualified high-voltage bipolar transistor family, engineered specifically for robust switching in automotive lighting, industrial power conversion, and telecom infrastructure where voltage margin and thermal stability are critical.

FAQ

Is PXTA92-QX pin-compatible with PXTA42-Q?

No - PXTA92-QX is a PNP device while PXTA42-Q is its NPN complement. They share identical SOT89 pinout (E-C-B), but polarity reversal means direct substitution would invert circuit functionality and likely cause failure. Use only as complementary pair in push-pull or differential topologies.

What is the maximum allowable PCB copper area for the collector pad?

The datasheet specifies a 6 cm² single-sided tin-plated copper pad for the collector (Pin 2) to achieve R_th(j-a) = 96 K/W and sustain full 1.3 W dissipation. Reducing pad area increases thermal resistance proportionally; halving area raises R_th(j-a) to ~140 K/W, limiting usable power to ~0.9 W at 25 °C ambient.

Does PXTA92-QX support pulsed operation beyond ICM = −200 mA?

Yes - I_CM = −200 mA is specified for 10 ms pulses at duty cycle ≤ 10%. At 1% duty cycle, peak current may reach −500 mA briefly, provided average power remains within P_tot derating limits and junction temperature stays below 150 °C. Thermal simulation is required for non-standard pulse profiles.

Can PXTA92-QX be used in linear amplifier applications?

Not recommended - its design targets switching operation. The h_FE variation across I_C (25–40) and significant V_CE(sat) shift with current indicate poor linearity. For amplification, consider dedicated linear PNP transistors like BC807-40 or MMBT4403 with tighter h_FE tolerance and optimized small-signal parameters.