Nexperia USA Inc. NHDTA144EUX

Overview

NHDTA144EUX from Nexperia is a PNP resistor-equipped transistor (RET) in SOT323 (SC-70) package, designed for digital switching and IC input control. It features 47 kΩ integrated base resistors (R1 = R2), −80 V collector-emitter breakdown voltage, −100 mA output current capability, and AEC-Q101 qualification for automotive-grade reliability. Used in load switching and logic-level interface circuits where space-constrained PCBs require simplified biasing.

For engineers reviewing the NHDTA144EUX datasheet, NHDTA144EUX pinout, NHDTA144EUX application, or NHDTA144EUX equivalent, key selection criteria include built-in resistor values, PNP polarity with emitter-grounded configuration, thermal derating on FR4 PCBs, and compatibility with BC856-series replacement in cost-sensitive digital control nodes.

Technical Context

This device integrates a PNP bipolar transistor with two monolithic 47 kΩ bias resistors (R1 = R2) to enable single-resistor external drive-eliminating discrete base resistors. Its emitter is internally tied to ground (Pin 2), input applied to Pin 1 (base), and collector output on Pin 3, forming a grounded-emitter switch topology.

It operates within −55 °C to +150 °C ambient range, supports 100 mA DC output with ≤100 mV VCE(sat) at IC = −10 mA / IB = −0.5 mA, and delivers hFE ≥100 at VCE = −5 V / IC = −10 mA. Thermal resistance is 397 K/W (junction-to-solder-point, 4-layer PCB) and 532 K/W (junction-to-ambient, single-sided PCB).

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 1.8 mm footprint, 0.95 mm height, 3-terminal leadframe with gull-wing leads. Compatible with standard reflow and wave soldering profiles per JEDEC J-STD-020/003.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NHDTC144EU, NHDTA144EUX enables active-low switching with ground-referenced loads; compared with BC856B,215, it trades marginal hFE improvement for guaranteed resistor matching, reduced assembly steps, and AEC-Q101 compliance out-of-box.

Availability

NHDTA144EUX is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input conditioning, and smart lighting driver interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for NHDTA144EUX 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

NHDTA144EUX belongs to the NHDTAxxxEU series of resistor-equipped transistors engineered for cost-sensitive, space-constrained digital switching in automotive and industrial control systems.

FAQ

What is the maximum continuous collector current for NHDTA144EUX?

The absolute maximum continuous collector current is −100 mA at Tamb ≤ 25 °C with 4-layer FR4 PCB mounting. Derating applies above 25 °C per Fig. 1: at 75 °C ambient, max current drops to ~235 mW / (−100 mV) ≈ −2.35 A theoretical limit, but practical design limits remain at −100 mA due to junction temperature constraints and SOA boundaries.

Can NHDTA144EUX replace BC856B in existing designs?

Yes, with minor layout adaptation: NHDTA144EUX uses the same SOT323 footprint as BC856B but integrates both base resistors. Replace BC856B + external 47 kΩ resistor with NHDTA144EUX directly-pin 1 (base) becomes input, pin 2 (emitter) remains GND, pin 3 (collector) retains output function. No change to signal logic required.

Is NHDTA144EUX suitable for 24 V industrial control inputs?

Yes. With V_CEO = −80 V and VI(off) ≤ −1.15 V, it reliably blocks 24 V transients while maintaining off-state integrity. Its −100 mA rating supports driving optocoupler LEDs (typically 10–20 mA) or small relays directly. AEC-Q101 qualification further validates robustness against ESD and temperature cycling in factory-floor environments.

What is the thermal resistance from junction to solder point for NHDTA144EUX?

R_th(j-sp) is 150 K/W when mounted on a standard FR4 PCB with tin-plated pads and 4-layer copper. This value assumes full thermal pad connection and is measured per JEDEC standards. It enables accurate junction temperature estimation using T_j = T_solder + (P_diss × 150), critical for lifetime prediction in sealed enclosures.