Nexperia USA Inc. PDTA143EQBZ

Overview

PDTA143EQB from Nexperia is a 50 V, 100 mA PNP resistor-equipped transistor (RET) in a DFN1110D-3 (SOT8015) leadless package with side-wettable flanks. It integrates 4.7 kΩ input and output bias resistors, delivers ≤100 mV V_CE(sat) at I_C = −10 mA / I_B = −0.5 mA, and supports digital switching in space-constrained PCBs such as portable power management and logic-level interface circuits.

For engineers reviewing the PDTA143EQB datasheet, PDTA143EQB pinout, PDTA143EQB application, or PDTA143EQB equivalent, this part serves as a drop-in replacement for BC857-series transistors in low-power digital switching, offering reduced component count, AOI-compatible solder joints, and verified thermal performance on FR4 PCBs.

Technical Context

This PNP RET integrates two monolithic silicon resistors (R1 = R2 = 4.7 kΩ) directly into the emitter-base-collector path, eliminating external base bias components. Its internal structure enables guaranteed turn-on at V_I(on) = −2.5 V to −1.9 V (V_CE = −0.3 V, I_C = −20 mA) and reliable turn-off at V_I(off) = −1.1 V to −0.5 V (V_CE = −5 V, I_C = −100 µA).

The device operates within −55 °C to +150 °C ambient range, with junction-to-ambient thermal resistance of 368 K/W (35 µm copper) or 298 K/W (70 µm copper), and exhibits f_T = 180 MHz - confirming suitability for high-speed digital switching up to ~10 MHz edge rates.

Key Specifications

Pinout & Package

DFN1110D-3 (SOT8015) is a 3-terminal, leadless, ultra-thin surface-mount package with side-wettable flanks for AOI-compatible reflow soldering. Dimensions: 1.1 mm × 1.0 mm × 0.48 mm body height; 0.65 mm pitch; 0.5 mm max overall height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC143EQB, PDTA143EQB enables high-side switching without logic inversion, while versus BC857B it reduces bill-of-materials by two resistors and saves 0.6 mm² PCB area - critical in miniaturized portable designs.

Availability

PDTA143EQB is available at Aetrix Electronics and suitable for LED indicator control, microcontroller input protection, logic-level translation, and small-load switching requiring stable component supply and AOI-compatible manufacturing.

Supply support for PDTA143EQB 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 semiconductors for efficient power management, logic, analog, and MOSFET solutions.

PDTA143EQB belongs to the RET (Resistor-Equipped Transistor) product line, engineered to simplify digital interface design by integrating bias networks into miniature leadless packages for space- and cost-sensitive consumer and industrial applications.

FAQ

What is the maximum continuous collector current for PDTA143EQB?

The maximum continuous collector current is −100 mA at T_amb ≤ 25 °C on a standard FR4 PCB with 35 µm copper. Derating applies above 25 °C per Figure 1: at 75 °C ambient, maximum allowable I_C drops to approximately −65 mA to maintain P_tot ≤ 340 mW.

Can PDTA143EQB replace BC857B in existing designs without layout changes?

No - PDTA143EQB uses DFN1110D-3 (SOT8015) with 0.65 mm pitch and side-wettable flanks, whereas BC857B uses SOT23-3 with 0.95 mm pitch and gull-wing leads. A new footprint and stencil are required; however, schematic changes are minimal due to identical pin function mapping (input/base, GND/emitter, output/collector).

What is the typical V_I(on) threshold for reliable turn-on?

V_I(on) is specified as −2.5 V to −1.9 V (typical −2.2 V) at V_CE = −0.3 V and I_C = −20 mA. This guarantees full saturation with standard 3.3 V or 5 V logic outputs, even under worst-case temperature and process variation.

Does PDTA143EQB support reflow soldering with standard lead-free profiles?

Yes - Nexperia specifies compatibility with JEDEC J-STD-020D.2 peak reflow temperature of 260 °C for ≤ 30 seconds. The DFN1110D-3 package's side-wettable flanks are optimized for IPC-A-610 Class 2/3 visual and AOI inspection after standard lead-free reflow.