Nexperia USA Inc. PDTB143XUF

Overview

PDTB143XUF from Nexperia is a PNP resistor-equipped transistor (RET) in SOT323 (SC-70) package, designed for digital switching applications with built-in bias resistors R1 = 4.7 kΩ and R2 = 10 kΩ, −50 V V_CEO, −500 mA I_O, and AEC-Q101 qualification for automotive use.

For engineers reviewing the PDTB143XUF datasheet, PDTB143XUF pinout, PDTB143XUF application, or PDTB143XUF equivalent, key selection criteria include input voltage range (−30 V to +7 V), off-state input voltage (−0.5 to −1.1 V), DC current gain (h_FE = 70 typ.), collector-emitter saturation voltage (−100 mV max), and thermal capability up to 175 °C junction temperature.

Technical Context

This device integrates a PNP bipolar transistor with two precision on-chip resistors (R1 = 4.7 kΩ, R2 = 10 kΩ) forming a fixed bias network, enabling direct logic-level drive without external components. Its R2/R1 ratio of 2.13 ±0.23 ensures stable turn-on/turn-off thresholds under varying temperature and supply conditions.

Rated for −50 V collector-base and collector-emitter voltages, it supports robust operation in 12 V and 24 V automotive subsystems. With f_T = 140 MHz and C_c = 11 pF, it maintains fast switching performance while minimizing layout parasitics in space-constrained SOT323 footprints.

Key Specifications

Pinout & Package

Package: SOT323 (SC-70), surface-mount plastic package with 3 leads, footprint dimensions 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), optimized for high-density PCB layouts and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.

Compared with PDTB143EU, PDTB143XUF offers improved noise immunity due to its higher R2 value and wider VI(off) range, while PDTC143XU provides functional symmetry in NPN configurations-both retain identical thermal and package characteristics for drop-in layout reuse.

Availability

PDTB143XUF is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, LED lighting control, and smart HVAC actuator interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PDTB143XUF 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 essential semiconductors for automotive, industrial, and consumer markets.

PDTB143XUF belongs to the PDTB1xxxU series of AEC-Q101-qualified PNP RETs, engineered specifically for space-constrained, high-temperature digital switching in automotive electronics and industrial control systems.

FAQ

What is the maximum allowable input voltage for PDTB143XUF?

The absolute maximum input voltage (V_I) is −30 V to +7 V, as specified in Table 6 of the datasheet. Exceeding +7 V risks damaging the internal R1 resistor network; operation above −30 V may cause irreversible breakdown of the integrated bias structure.

Can PDTB143XUF replace BC807-40 in existing designs?

No direct replacement: BC807-40 is a bare PNP transistor requiring external base resistors, while PDTB143XUF integrates R1 = 4.7 kΩ and R2 = 10 kΩ. Circuit redesign is needed to remove external bias components and verify VI(on)/VI(off) compatibility with the driving logic.

Is thermal derating required for continuous 500 mA operation?

Yes. At T_amb = 25 °C on a 4-layer FR4 PCB, P_tot = 425 mW allows ~500 mA only if V_CE(sat) ≤ 0.85 V. At 500 mA and −100 mV V_CE(sat), power dissipation is 50 mW - well within limits. However, ambient temperatures above 100 °C require derating per Figure 1's power curve.

Does PDTB143XUF support PWM switching at frequencies above 10 kHz?

Yes. With f_T = 140 MHz and typical switching times (t_on/t_off) < 100 ns, it supports clean PWM operation up to at least 100 kHz. Layout must minimize trace inductance on pins 1 and 3, and ensure adequate grounding at pin 2 to maintain signal integrity.