Nexperia USA Inc. NHDTA124EUF

Overview

NHDTA124EU from Nexperia is a PNP resistor-equipped transistor (RET) in SOT323 (SC-70) package, designed for digital switching and IC input control. It features 80 V collector-emitter breakdown voltage, 100 mA output current capability, built-in 22 kΩ input and 22 kΩ base-emitter bias resistors, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the NHDTA124EU datasheet, NHDTA124EU pinout, NHDTA124EU application, or NHDTA124EU equivalent, this device serves as a drop-in replacement for BC856-series transistors in low-power digital logic interfaces, load switching, and microcontroller I/O conditioning where simplified biasing and reduced BOM count are critical.

Technical Context

This PNP RET integrates two precision-matched on-die resistors (R1 = R2 = 22 kΩ) to eliminate external base bias components, enabling direct connection to CMOS/TTL logic outputs. Its open-base VCEO of −80 V and ICBO < −100 nA support robust operation in noisy industrial environments.

The device delivers hFE = 70 at VCE = −5 V and IC = −10 mA, with VCEsat ≤ −100 mV under IC/IB = 20 drive, ensuring low conduction loss in active switching. Thermal resistance Rth(j-a) is 532 K/W on single-sided FR4 PCB, supporting stable performance up to 150 °C junction temperature.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, 3-terminal leadframe with gull-wing leads; optimized for high-density PCB layouts and reflow soldering per IPC-7095.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NHDTC124EU, NHDTA124EU enables high-side switching with standard logic levels, while versus BC856B it trades higher gain for reduced component count, smaller footprint, and guaranteed automotive reliability-critical for production-grade embedded systems.

Availability

NHDTA124EU is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and consumer IoT sensor hubs requiring stable component supply, AEC-Q101 compliance, and compact SMT packaging.

Supply support for NHDTA124EU 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 mobile markets.

NHDTA124EU belongs to the NHDTAxxxEU series of resistor-equipped transistors, engineered specifically to simplify digital interface design in space- and cost-constrained applications while meeting stringent automotive reliability standards.

FAQ

What is the maximum operating temperature for NHDTA124EU?

The NHDTA124EU has a maximum junction temperature (Tj) of 150 °C and operates across an ambient temperature range of −55 °C to +150 °C. Its thermal resistance Rth(j-a) is 532 K/W on single-layer FR4 PCB, meaning power dissipation must be derated above 25 °C ambient per Figure 1 in the datasheet.

Can NHDTA124EU replace BC856B in existing designs without layout changes?

No-NHDTA124EU integrates bias resistors and uses SOT323 (SC-70), whereas BC856B is in SOT23 and requires two external resistors. Layout revision is needed to accommodate the smaller footprint and eliminate external R1/R2. However, schematic changes are minimal: connect logic signal to Pin 1, load to Pin 3, and ground to Pin 2.

What is the off-state input voltage (VI(off)) specification for NHDTA124EU?

VI(off) is −1.15 V (min) to −0.8 V (max) at VCE = −5 V and IC = −100 µA. This defines the maximum negative input voltage at Pin 1 that guarantees device cutoff-critical for interfacing with open-drain or level-shifted logic outputs where undershoot may occur.

Is NHDTA124EU suitable for linear analog amplification?

No-it is optimized for digital switching, not linear operation. Its hFE variation across collector current (Figure 10) and lack of guaranteed linearity parameters (e.g., fT stability, harmonic distortion) make it unsuitable for amplifier stages. Use dedicated general-purpose PNP transistors like BC807 for analog gain applications.