Nexperia USA Inc. PDTA143EQAZ

Overview

PDTA143EQAZ from Nexperia is a 50 V, −100 mA PNP resistor-equipped transistor (RET) in a DFN1010D-3 (SOT1215) ultra-thin surface-mount package with integrated 4.7 kΩ input and feedback bias resistors. It functions as a digital switch for IC input control and load switching in space-constrained automotive and industrial PCBs, delivering −150 mV V_CE(sat) at −10 mA I_C and −0.5 mA I_B.

For engineers reviewing the PDTA143EQAZ datasheet, PDTA143EQAZ pinout, PDTA143EQAZ application, or PDTA143EQAZ equivalent, this device serves as an AEC-Q101-qualified, leadless alternative to BC857-series transistors-optimized for AOI-compatible assembly, reduced component count, and simplified digital interface design in high-density layouts.

Technical Context

This PNP RET integrates two precision-matched on-die resistors (R1 = R2 = 4.7 kΩ) to provide fixed base biasing, eliminating external resistors and reducing layout complexity. Its internal transistor exhibits h_FE ≥ 30 at V_CE = −5 V and I_C = −10 mA, with f_T = 180 MHz enabling reliable operation in moderate-speed digital switching.

The DFN1010D-3 package features visible and solderable side pads, 0.37 mm profile, and thermal resistance R_th(j-a) = 284 K/W on 4-layer FR4 PCB-supporting high-volume reflow assembly and automated optical inspection of solder joints without requiring underfill or special stencil design.

Key Specifications

Pinout & Package

DFN1010D-3 (SOT1215) is a 3-terminal, leadless, ultra-thin plastic package with visible side pads for automated optical inspection and enhanced thermal performance on 4-layer PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC143EQA, PDTA143EQAZ enables direct high-side switching with grounded emitter, while versus BC857BW it eliminates two passives and reduces footprint by 58%, accelerating time-to-test and improving long-term field reliability in vibration-prone environments.

Availability

PDTA143EQAZ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, consumer appliance UI panels, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and high-reliability manufacturing.

Supply support for PDTA143EQAZ 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 technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The PDTA143EQAZ belongs to Nexperia's AEC-Q101-qualified resistor-equipped transistor (RET) family, engineered specifically for space-constrained, high-volume digital switching applications where BOM reduction, AOI compatibility, and automotive-grade reliability are mandatory.

FAQ

What is the maximum continuous collector current for PDTA143EQAZ?

The maximum continuous collector current is −100 mA, specified under standard FR4 PCB conditions with 4-layer copper. Derating applies above +25 °C ambient: power dissipation drops linearly to zero at +150 °C junction temperature, with P_tot = 440 mW at 25 °C ambient on 4-layer board.

Can PDTA143EQAZ replace BC857 in existing designs without layout changes?

No-PDTA143EQAZ uses DFN1010D-3 (1.1 × 1.0 mm), while BC857 typically uses SOT23 or SOT323 packages (≥1.3 × 1.75 mm). Direct replacement requires PCB redesign. However, its integrated R1/R2 eliminates two external resistors, offsetting layout effort with BOM simplification and improved AOI yield.

Is the dual-collector configuration (pins 3 and 4) mandatory to use?

Yes-pins 3 and 4 are internally shorted collector terminals. Both must be soldered to the load net to achieve rated −100 mA current capacity and optimal thermal performance. Leaving either pin unconnected de-rates maximum current and increases thermal resistance by >35%.

Does PDTA143EQAZ support 1.8 V logic-level drive?

No-its VI(on) is −1.9 V (typical) at I_C = −20 mA, meaning reliable turn-on requires ≥−2.5 V input. For 1.8 V systems, use PDTA144EQAZ (VI(on) = −1.6 V typ) or add a level-shifting stage; direct 1.8 V drive risks incomplete saturation and elevated V_CE(sat).