Nexperia USA Inc. PDTC124XQCZ

Overview

PDTC124XQC from Nexperia is a 50 V, 100 mA NPN resistor-equipped transistor (RET) in a DFN1412D-3 (SOT8009) leadless package with side-wettable flanks. It integrates 22 kΩ input bias resistor (R1) and 47 kΩ feedback resistor (R2), delivers 100 mA output current, exhibits 80× DC current gain at 5 mA collector current, and supports ≤100 mV collector-emitter saturation voltage - used for digital switching and IC input control in space-constrained consumer and industrial PCBs.

For engineers reviewing the PDTC124XQC datasheet, PDTC124XQC pinout, PDTC124XQC application, or PDTC124XQC equivalent, this page provides verified pin functions, real-world switching performance metrics, AOI-compatible solder joint validation, thermal derating curves for FR4 PCBs, and direct alternatives for RET-based logic interface design.

Technical Context

This NPN RET integrates two precision thin-film resistors on-die to form a single-input, single-output active switch with built-in base biasing. Its R1 = 22 kΩ and R2 = 47 kΩ yield a resistor ratio of 2.13, enabling predictable turn-on at VI(on) = 1.1–2.0 V (IC = 2 mA) and reliable turn-off at VI(off) = 0.5–0.8 V (IC = 100 µA).

The device operates with VCEO = 50 V and VEBO = 7 V, supports continuous 100 mA output current, and maintains hFE ≥ 80 at VCE = 5 V and IC = 5 mA. Its 0.48 mm profile and side-wettable flanks meet IPC-7351B reflow requirements for automated optical inspection and high-density SMT assembly.

Key Specifications

Pinout & Package

PDTC124XQC uses a 3-terminal DFN1412D-3 (SOT8009) package with side-wettable flanks, measuring 1.4 mm × 1.2 mm × 0.48 mm and featuring a 0.8 mm pitch. The package supports automated optical inspection and offers low thermal resistance (278 K/W on 70 µm FR4 PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC124XQC, PDTC143XQC provides higher base sensitivity and faster response in 3.3 V systems, while BC847B offers superior gain and lower VCE(sat) at the cost of added passives and layout overhead - making PDTC124XQC optimal for cost- and space-sensitive 1.8–3.3 V digital interfaces.

Availability

PDTC124XQC is available at Aetrix Electronics and suitable for LED indicator control, microcontroller input protection, digital signal level translation, and low-side load switching requiring stable component supply across consumer, industrial, and IoT production programs.

Supply support for PDTC124XQC 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 - serving automotive, industrial, and consumer markets with high-volume reliability.

PDTC124XQC belongs to Nexperia's resistor-equipped transistor (RET) product line, engineered specifically to replace discrete BJT + resistor combinations in digital interface and switching applications where miniaturization and manufacturing simplicity are critical.

FAQ

What is the maximum allowable continuous collector current for PDTC124XQC?

The maximum continuous collector current is 100 mA under standard conditions (Tamb ≤ 25 °C, FR4 PCB with 70 µm copper). At elevated ambient temperatures, derating applies: power dissipation drops to 360 mW above 25 °C, limiting usable current based on thermal design and PCB layout.

Can PDTC124XQC be used as a direct replacement for BC847 in existing designs?

PDTC124XQC can replace BC847 in digital switching roles where its integrated 22 kΩ/47 kΩ resistor network matches the required biasing - but it is not pin-compatible. The RET requires only one input connection versus BC847's separate base resistor, so layout revision is needed to remove external resistors and route directly to Pin 1.

Does PDTC124XQC support Automatic Optical Inspection (AOI)?

Yes - its DFN1412D-3 (SOT8009) package features side-wettable flanks, allowing AOI systems to inspect solder fillet formation on all three terminals. This capability is validated per IPC-A-610 Class 2/3 standards and confirmed in Nexperia's reflow footprint documentation (Fig. 37).

What is the typical transition frequency (fT) of the internal transistor in PDTC124XQC?

The internal NPN transistor has a typical transition frequency fT of 230 MHz at VCE = 5 V, IC = 10 mA, and f = 100 MHz. This value reflects the bare die performance; actual small-signal switching speed in RET configuration is governed by RC time constants of the integrated resistors and load capacitance.