Nexperia USA Inc. NHDTC124ETVL

Overview

NHDTC124ETVL from Nexperia is an 80 V, 100 mA NPN resistor-equipped transistor (RET) in SOT23 (TO-236AB) package, featuring integrated 22 kΩ input and 22 kΩ base-emitter bias resistors. It functions as a single-chip digital switch for IC input control and load switching in automotive and industrial logic interfaces, with AEC-Q101 qualification and 100 mV V_CE(sat) at I_C = 10 mA / I_B = 0.5 mA.

For engineers reviewing the NHDTC124ETVL datasheet, NHDTC124ETVL pinout, NHDTC124ETVL application, or NHDTC124ETVL equivalent, this part serves as a drop-in replacement for BC846-series transistors in digital switching circuits where built-in biasing simplifies PCB layout, reduces BOM count, and supports automotive-grade reliability requirements.

Technical Context

This RET integrates two precision-matched 22 kΩ resistors: R1 between base and input terminal, and R2 between base and emitter, enabling direct TTL/CMOS-level drive without external bias components. Its 80 V V_CEO rating supports operation across 12 V, 24 V, and 48 V automotive supply rails.

The device delivers h_FE ≥ 70 at V_CE = 5 V and I_C = 10 mA, with VI(on) = 2.3 V (typ) and VI(off) = 1.15 V (typ), ensuring robust noise margin in noisy environments. Thermal resistance R_th(j-a) is 500 K/W on single-layer FR4, supporting continuous 100 mA output under defined board conditions.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads, 1.3 mm height, and standard 0.95 mm lead pitch. Compatible with reflow and wave soldering per IPC-7351B 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, NHDTC124ETVL reduces bill-of-materials and assembly steps; compared with NHDTC114ETVL, it offers higher input impedance and better noise rejection in 5 V/24 V environments due to its 22 kΩ bias network.

Availability

NHDTC124ETVL is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and consumer appliance control boards requiring stable component supply, AEC-Q101 compliance, and SMT scalability.

Supply support for NHDTC124ETVL 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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components and efficient manufacturing.

NHDTC124ETVL belongs to the NHDTCxx4ET series of resistor-equipped transistors designed specifically for cost-optimized, space-constrained digital switching in automotive and industrial control applications.

FAQ

What is the maximum allowable input voltage (VI) for NHDTC124ETVL?

The absolute maximum input voltage VI is +60 V, as specified in Table 6 of the datasheet. This limit applies with the emitter grounded and accounts for transient overvoltage conditions. Continuous operation above +5 V is not recommended unless verified for specific pulse-width and duty-cycle conditions.

Can NHDTC124ETVL replace BC847 in existing designs?

Yes, with circuit validation: NHDTC124ETVL matches BC847's pinout (SOT23, same pin 1–2–3 assignment) and provides comparable h_FE and V_CEO, but adds integrated 22 kΩ bias resistors. External base resistors must be removed, and VI(on)/VI(off) thresholds should be checked against the driving source.

Is thermal derating required for operation above 25 °C ambient?

Yes - total power dissipation must be linearly derated above 25 °C at 2.5 mW/°C for single-layer FR4 (250 mW @ 25 °C → 0 mW @ 125 °C). Derating follows the curve in Figure 1 and depends on PCB copper layer count and layout; 4-layer boards allow 350 mW at 25 °C.

Does NHDTC124ETVL support PWM switching at frequencies above 10 kHz?

Yes - with f_T = 170 MHz (typ) for the internal transistor, it supports clean switching up to at least 100 kHz. However, switching speed is limited by RC time constants of the 22 kΩ resistors and junction capacitance (C_c = 2.5 pF); rise/fall times are typically < 100 ns under 10 mA load.