Nexperia USA Inc. PMBTA92-QR

Overview

PMBTA92-QR from Nexperia is a PNP high-voltage bipolar junction transistor in SOT23 package, rated for −300 V V_CEO, −100 mA I_C, and 250 mW P_tot, with DC current gain h_FE ≥ 40 at −10 mA. It serves as a high-voltage switching or amplification element in off-hook detection circuits, telephone line interface stages, and automotive signal conditioning modules.

For engineers reviewing the PMBTA92-QR datasheet, PMBTA92-QR pinout, PMBTA92-QR application, or PMBTA92-QR equivalent, key selection criteria include verified −300 V breakdown rating, AEC-Q101 qualification, SOT23 thermal resistance of 500 K/W, and confirmed PNP polarity with base-emitter saturation voltage ≤ −900 mV.

Technical Context

This discrete PNP transistor operates in active or saturation mode for high-voltage DC switching, with guaranteed V_(BR)CEO = −300 V at I_C = −1 mA and V_CEsat ≤ −500 mV at I_C = −20 mA / I_B = −2 mA. Its f_T = 50 MHz supports moderate-frequency signal amplification up to ~10 MHz in linear applications.

Thermal performance is defined for FR4 PCB mounting (single-sided, 35 µm Cu), delivering R_th(j-a) = 500 K/W. Cut-off leakage currents are tightly specified: I_CBO ≤ −250 nA at V_CB = −200 V and I_EBO ≤ −100 nA at V_EB = −3 V.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, three terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC807-40-Q and MMBT92A, PMBTA92-QR uniquely combines −300 V rating, AEC-Q101 qualification, and SOT23 footprint-making it the only option validated for automotive telephony and high-voltage industrial signal isolation where both reliability and voltage headroom are critical.

Availability

PMBTA92-QR is available at Aetrix Electronics and suitable for telephone line interface, automotive door module, and industrial power supply feedback applications requiring stable component supply and long-term lifecycle support.

Supply support for PMBTA92-QR 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and efficient manufacturing.

The PMBTA92-QR belongs to Nexperia's AEC-Q101-qualified high-voltage transistor product line, designed specifically for robust signal switching in automotive infotainment, body electronics, and legacy telecom infrastructure.

FAQ

Is PMBTA92-QR pin-compatible with PMBTA42-Q?

No. PMBTA92-QR is a PNP transistor with pinout Base–Emitter–Collector (1–2–3), while PMBTA42-Q is its NPN complement with identical SOT23 mechanical outline but reversed polarity and complementary pin function mapping. Direct substitution without circuit redesign will cause functional failure.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is −100 mA (single pulse, t_p ≤ 1 ms), but for continuous DC operation, base current must be limited to ensure I_C ≤ −100 mA and junction temperature stays within 150 °C. At I_C = −10 mA and h_FE ≥ 40, recommended I_B is ≤ −250 µA to maintain safe thermal margin on FR4 PCB.

Does PMBTA92-QR support wave soldering?

Yes. Nexperia provides dedicated wave soldering footprint data (Fig. 3) for SOT23, specifying 2.8 mm × 4.5 mm board area with 1.4 mm × 1.2 mm solder lands. Thermal profile must respect T_j ≤ 150 °C and avoid exceeding 260 °C peak temperature for ≤ 10 seconds to prevent package delamination.

Can PMBTA92-QR replace BCW68G in an existing design?

Only after validation. BCW68G is a TO-92 PNP transistor rated for −100 V and −150 mA, with different thermal resistance and pinout. PMBTA92-QR offers higher voltage rating (−300 V) but lower current (−100 mA) and SOT23 packaging. Mechanical, thermal, and electrical re-characterization-including V_CEsat and switching timing-is required before substitution.