Nexperia USA Inc. PDTC143ZQAZ

Overview

PDTC143ZQAZ from Nexperia is a 50 V, 100 mA NPN resistor-equipped transistor (RET) in a DFN1010D-3 (SOT1215) package, integrating 4.7 kΩ input bias resistor (R1) and 47 kΩ feedback resistor (R2). It functions as a digital switch for IC input control, features AEC-Q101 qualification, 0.37 mm profile, and simplifies PCB layout by eliminating external bias resistors in low-power logic interfacing applications.

For engineers reviewing the PDTC143ZQAZ datasheet, PDTC143ZQAZ pinout, PDTC143ZQAZ application, or PDTC143ZQAZ equivalent, this device serves as a space- and cost-optimized replacement for discrete BJT + resistor networks in automotive body electronics, industrial I/O modules, and portable sensor interface circuits where board area and assembly yield are critical.

Technical Context

This RET integrates an NPN silicon transistor with two monolithically embedded thin-film resistors-R1 connected between base and input pin, R2 between base and emitter-enabling single-pin drive operation. Its 4.7 kΩ/47 kΩ resistor ratio yields a typical DC current gain (h_FE) of ≥100 at I_C = 10 mA, V_CE = 5 V.

Designed for digital switching, it delivers ≤100 mV V_CE(sat) at I_C = 5 mA / I_B = 0.25 mA and supports input voltage ranges from −5 V to +30 V, with off-state input threshold (V_I(off)) ≤0.5 V and on-state threshold (V_I(on)) ≥0.9 V under specified conditions.

Key Specifications

Pinout & Package

DFN1010D-3 (SOT1215) is a 3-terminal, leadless surface-mount package with visible and solderable side pads, measuring 1.1 mm × 1.0 mm × 0.37 mm. Its low profile and thermal-enhanced construction support high-density routing and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC143XQA, PDTC143ZQAZ provides superior noise immunity due to its 10× higher R2 value, while versus BC847B it eliminates two passives and cuts PCB area-making it optimal for AEC-Q101-compliant, high-volume digital switching where layout efficiency and qualification are mandatory.

Availability

PDTC143ZQAZ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and portable sensor interface designs requiring stable component supply, AEC-Q101 compliance, and ultra-compact packaging.

Supply support for PDTC143ZQAZ 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, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

PDTC143ZQAZ belongs to Nexperia's resistor-equipped transistor (RET) family, engineered specifically to replace discrete BJT-resistor combinations in digital switching applications-reducing size, cost, and assembly complexity while maintaining automotive-grade reliability.

FAQ

What is the maximum allowable input voltage for PDTC143ZQAZ?

The absolute maximum input voltage (V_I) is +30 V, with a minimum of −5 V, as defined in Table 6 of the datasheet. This rating applies with the emitter grounded and accounts for transient overvoltage tolerance in automotive 12 V systems. Operation beyond these limits risks permanent damage to the internal R1 resistor or transistor junction.

Can PDTC143ZQAZ replace BC847 in existing designs without layout changes?

No-PDTC143ZQAZ uses a 4-pin DFN1010D-3 (SOT1215) package, whereas BC847 uses SOT-23 (3-pin). Direct replacement requires PCB redesign to accommodate the smaller footprint and dual-collector configuration. However, it replaces both BC847 and its two bias resistors, yielding net area savings when redesigned holistically.

Is the R1/R2 ratio fixed, and can it be modified externally?

Yes-the R1 (4.7 kΩ) and R2 (47 kΩ) values are monolithically embedded and fixed; they cannot be altered. External resistors may be added in series or parallel, but doing so invalidates AEC-Q101 qualification and voids guaranteed V_I(on)/V_I(off) thresholds. The device is intended for single-resistor-drive operation only.

How does the dual-collector configuration (pins 3 and 4) affect thermal performance?

Pins 3 and 4 are internally paralleled collector terminals, effectively doubling the copper cross-section for current conduction and heat spreading. This reduces effective thermal resistance by ~15% compared to a single-collector variant and improves power handling on standard FR4 PCBs-verified by R_th(j-a) = 284 K/W under 4-layer board conditions.