Nexperia USA Inc. PDTA143ZQCZ

Overview

PDTA143ZQC from Nexperia is a 50 V, 100 mA PNP resistor-equipped transistor (RET) in a DFN1412D-3 (SOT8009) leadless package with side-wettable flanks. It integrates R1 = 4.7 kΩ and R2 = 47 kΩ bias resistors, delivers h_FE = 100 at V_CE = −5 V / I_C = −10 mA, and achieves V_CE(sat) ≤ −100 mV - used for digital switching, IC input control, and low-power load management in space-constrained consumer and industrial PCBs.

For engineers reviewing the PDTA143ZQC datasheet, PDTA143ZQC pinout, PDTA143ZQC application, or PDTA143ZQC equivalent, this page provides verified electrical parameters, validated SOT8009 package dimensions, confirmed thermal derating curves, real-world switching performance data, and cross-referenced alternatives for discrete logic-level PNP switching in high-density SMT designs.

Technical Context

This RET implements a monolithic PNP bipolar transistor with two integrated silicon-based thin-film resistors: R1 connected between base and input terminal, R2 between base and emitter. The internal topology eliminates external bias components while maintaining predictable turn-on/off thresholds across temperature (−55 °C to +150 °C).

Its DFN1412D-3 package features side-wettable flanks for automated optical inspection (AOI) of solder joints, 0.8 mm pitch, and 0.48 mm body height - enabling reliable reflow on fine-pitch PCBs without tombstoning. Thermal resistance R_th(j-a) is 278 K/W on 70 µm FR4 copper.

Key Specifications

Pinout & Package

DFN1412D-3 (SOT8009) is a 3-terminal, leadless, ultra-small surface-mount plastic package measuring 1.4 × 1.2 × 0.48 mm with side-wettable flanks for AOI-compatible reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC143ZQC, PDTA143ZQC offers PNP polarity for sinking loads and direct compatibility with standard microcontroller outputs; versus PDTA123JQC, it provides higher input impedance and more robust noise rejection in 3.3 V systems due to its 4.7 kΩ R1.

Availability

PDTA143ZQC is available at Aetrix Electronics and suitable for LED indicator control, microcontroller input protection, digital load switching, and BC857 drop-in replacements requiring stable component supply, full traceability, and long-term production support.

Supply support for PDTA143ZQC 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, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.

PDTA143ZQC belongs to the RET family designed specifically for digital switching applications where board space, assembly cost, and testability are critical - emphasizing integration, AOI compatibility, and predictable logic-level interfacing.

FAQ

What is the maximum continuous collector current for PDTA143ZQC?

The maximum continuous collector current is −100 mA at T_amb ≤ 25 °C on a standard FR4 PCB with 70 µm copper. Derating applies above 25 °C per Fig. 1: power dissipation drops linearly to 0 mW at 125 °C ambient, supporting sustained operation up to 100 mA only within that thermal envelope.

Can PDTA143ZQC replace BC857B in existing designs?

Yes - PDTA143ZQC is a functional drop-in replacement for BC857B in digital switching roles. It matches the same SOT323 footprint (with adapter), provides identical V_CEO (−50 V) and I_C rating (−100 mA), and integrates bias resistors to eliminate two external components while maintaining compatible VI(on)/VI(off) thresholds.

Does PDTA143ZQC support automatic optical inspection (AOI)?

Yes - its DFN1412D-3 (SOT8009) package includes side-wettable flanks, enabling full-spectrum AOI of solder joints on all three terminals. This meets IPC-A-610 Class 3 requirements and eliminates manual visual inspection in high-reliability manufacturing lines.

What is the typical transition frequency (f_T) of the internal transistor?

The built-in PNP transistor has f_T = 180 MHz (typ.) at V_CE = −5 V, I_C = −10 mA, and f = 100 MHz. While optimized for DC/low-frequency switching, this bandwidth supports clean edge response up to ~10 MHz square waves without significant rise/fall time degradation.