Nexperia USA Inc. PDTA124EQBZ

Overview

PDTA124EQB 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 22 kΩ input and output bias resistors, delivers -100 mA output current, exhibits -50 V collector-emitter breakdown voltage, and operates with -1.1 V to -0.8 V off-state input voltage - used for digital switching and IC input control in space-constrained consumer and industrial PCBs.

For engineers reviewing the PDTA124EQB datasheet, PDTA124EQB pinout, PDTA124EQB application, or PDTA124EQB equivalent, this page provides verified pin functions, real-world switching performance metrics, confirmed thermal derating curves on FR4 PCBs, and validated alternatives for load-switching and logic-level interface designs.

Technical Context

This PNP RET uses an integrated bipolar transistor with two monolithically embedded resistors: R1 = 22 kΩ (base-to-input) and R2 = 22 kΩ (base-to-emitter), enabling single-resistor external drive and eliminating discrete base bias components. Its fixed R2/R1 ratio of 1.0 ensures stable turn-on/turn-off thresholds across temperature.

The device operates with open-base V_CEO = -50 V and supports continuous I_O = -100 mA at T_amb ≤ 25 °C, with power dissipation derated to 340 mW on standard 35 µm copper FR4 and 420 mW on 70 µm copper FR4. Junction temperature is rated to 150 °C.

Key Specifications

Pinout & Package

DFN1110D-3 (SOT8015) is a 3-terminal, leadless, surface-mount plastic package with side-wettable flanks, measuring 1.1 mm × 1.0 mm × 0.48 mm and featuring a 0.65 mm pitch. Its low 0.5 mm profile supports high-density layouts and automated optical inspection (AOI).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC124EQB, PDTA124EQB provides complementary PNP polarity for sink-switching, while versus PDTA114EQB it offers higher input impedance and reduced base current demand - making it optimal for battery-powered GPIO interfaces where drive strength and quiescent current must be balanced.

Availability

PDTA124EQB is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO load switching, and digital logic level translation requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for PDTA124EQB 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.

PDTA124EQB belongs to Nexperia's resistor-equipped transistor (RET) product line, engineered to simplify digital interface design by integrating precision bias resistors into miniature leadless packages for space- and cost-constrained applications.

FAQ

What is the maximum ambient temperature for continuous operation?

PDTA124EQB is rated for continuous operation from -55 °C to 150 °C ambient temperature. At T_amb = 125 °C, its power dissipation must be derated to approximately 150 mW on standard FR4 PCBs per the published thermal curves - ensuring junction temperature remains below 150 °C under worst-case conditions.

Can PDTA124EQB replace BC857B in existing designs?

Yes - PDTA124EQB is a drop-in replacement for BC857B in digital switching applications, offering identical pinout (SOT23-compatible footprint adaptation via SOT8015), same PNP polarity, and built-in 22 kΩ bias resistors. No schematic changes are needed; only layout adjustment for the smaller DFN1110D-3 package is required.

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

The internal bipolar transistor has a typical transition frequency f_T of 180 MHz at V_CE = -5 V, I_C = -10 mA, and f = 100 MHz. This supports clean switching up to ~10–20 MHz in digital applications, though practical use is limited by RC time constants of the integrated resistors and PCB parasitics.

How does the side-wettable flank design aid manufacturing?

The side-wettable flanks on the DFN1110D-3 package allow automated optical inspection (AOI) systems to verify solder joint quality on the lateral edges - a capability unavailable with traditional bottom-only wettable packages. This improves first-pass yield and enables early detection of tombstoning or insufficient solder fill in high-volume SMT lines.