Nexperia USA Inc. NHDTC144ETR

Overview

NHDTC144ETR from Nexperia is an 80 V, 100 mA NPN resistor-equipped transistor (RET) in SOT23 (TO-236AB) package, integrating 47 kΩ input and 47 kΩ base-emitter bias resistors. It functions as a single-chip digital switch for logic-level signal translation and load control, with 100 mV V_CE(sat) at I_C = 10 mA / I_B = 0.5 mA and AEC-Q101 qualification for automotive body electronics.

For engineers reviewing the NHDTC144ETR datasheet, NHDTC144ETR pinout, NHDTC144ETR application, or NHDTC144ETR equivalent, this device serves as a drop-in replacement for discrete BJT + resistor networks in low-power switching, IC input conditioning, and cost-sensitive digital interface circuits where guaranteed turn-on/off thresholds and reduced PCB footprint are critical.

Technical Context

This RET integrates a monolithic NPN transistor with two precision laser-trimmed on-die resistors: R1 (47 kΩ) between base and input, and R2 (47 kΩ) between base and emitter. Its internal resistor ratio (R2/R1 = 1.0) ensures predictable VI(on) = 3.3–5.0 V and VI(off) = 0.8–1.15 V across temperature, eliminating external bias component selection.

The device operates with open-base V_CEO = 80 V and supports continuous I_O = 100 mA at T_amb ≤ 25 °C, with thermal resistance R_th(j-a) = 500 K/W on single-sided FR4 PCB. Its f_T = 170 MHz enables stable operation in high-speed digital switching up to ~10 MHz edge rates.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package: 3-pin, 1.3 mm × 2.9 mm × 1.0 mm body, gull-wing leads, JEDEC standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC846B,115, NHDTC144ETR reduces total solution size and improves noise immunity via integrated resistors and guaranteed thresholds; compared with NHDTC124ETR, it trades lower input sensitivity for higher noise margin and compatibility with 5 V logic without level shifters.

Availability

NHDTC144ETR is available at Aetrix Electronics and suitable for automotive interior lighting control, industrial PLC digital input conditioning, consumer appliance power sequencing, and medical diagnostic equipment status indication requiring stable component supply, AEC-Q101 compliance, and SOT23 footprint compatibility.

Supply support for NHDTC144ETR 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 essential semiconductors for automotive, industrial, and consumer markets, with leadership in logic, discretes, and MOSFETs.

The NHDTCxx4ET series belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, designed specifically to replace discrete BJT + resistor combinations in digital switching applications where space, cost, and qualification are critical constraints.

FAQ

What is the maximum continuous collector current for NHDTC144ETR at 85 °C ambient?

The datasheet specifies 100 mA maximum output current at T_amb ≤ 25 °C. At 85 °C, derating applies: P_tot drops to ~200 mW on single-sided FR4 (Fig. 1), limiting I_C to approximately 63 mA assuming V_CE(sat) ≈ 100 mV. For sustained 100 mA operation, board-level thermal management (e.g., 4-layer copper) is required.

Can NHDTC144ETR be used in high-frequency PWM applications above 1 MHz?

Yes - its built-in transistor has f_T = 170 MHz (Fig. 22), and typical V_CE(sat) recovery time is <100 ns. However, switching losses increase above 500 kHz due to stored charge in the integrated resistors; for >1 MHz operation, verify layout parasitics and gate drive strength, as the internal R1 limits di/dt.

Does NHDTC144ETR support reverse-battery protection in automotive systems?

No - it is an NPN RET with unidirectional current flow (collector to emitter). Reverse-battery protection requires external circuitry such as a series P-channel MOSFET or dedicated protection IC; the device itself offers no inherent reverse-polarity blocking capability beyond its rated V_EBO = 10 V.

How does the marking code 'QM%' correspond to NHDTC144ETR?

Per Table 5, 'QM%' is the official top-side marking for NHDTC144ETR, where '%' is a placeholder for the manufacturing site code (e.g., QM1 for Nijmegen, QM2 for Bangkok). This marking is laser-etched on the SOT23 package and matches Nexperia's traceability standards for automotive-grade parts.