Diodes Incorporated ACX114EUQ-7R

Overview

ACX114EUQ from Diodes Incorporated is a complementary pre-biased dual transistor in SOT363 package, integrating one NPN and one PNP small-signal transistor with built-in 10 kΩ bias resistors (R1 = R2 = 10 kΩ) per channel. It supports ±50 V supply voltage, ±100 mA max collector current, and operates across –55 °C to +150 °C for automotive AEC-Q101-compliant control logic interfacing.

For engineers reviewing the ACX114EUQ datasheet, ACX114EUQ pinout, ACX114EUQ application, or ACX114EUQ equivalent, key selection criteria include verified input threshold voltages (V_I(OFF) = ±0.5 V, V_I(ON) = ±3.0 V), guaranteed V_CE(SAT) ≤ ±0.3 V at I_O = ±10 mA, and dual-channel thermal derating on FR4 board up to 270 mW total.

Technical Context

The ACX114EUQ implements two independent pre-biased transistors - one NPN (pins 1–3–6) and one PNP (pins 3–4–5) - sharing emitter terminals (pins 1 and 5) and base resistors (R1/R2 = 10 kΩ each). Each channel functions as a digital switch with defined turn-on/turn-off thresholds and fixed current gain (h_FE ≥ 30).

It uses epitaxial planar die construction and is qualified to AEC-Q101 for high-reliability automotive applications. The device operates with no external bias components required, reducing PCB footprint and simplifying level-shifting or signal inversion in low-power logic interfaces.

Key Specifications

Pinout & Package

SOT363 (SC-88) surface-mount package: 6-pin, 2.15 mm × 2.10 mm × 0.95 mm body, matte tin-plated leads, moisture sensitivity level 1, weight ≈ 0.006 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pre-biased dual transistor applications.

Compared with NSVD2101PT1G and EMH11T2R, the ACX114EUQ uniquely combines AEC-Q101 qualification, matched 10 kΩ biasing, and sub-0.3 V saturation in a single SOT363 device - making it optimal for space-constrained, thermally demanding automotive signal switching where reliability validation is mandatory.

Availability

ACX114EUQ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input conditioning, HVAC fan speed control, and consumer appliance motor driver interfaces requiring stable component supply and full traceability.

Supply support for ACX114EUQ 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The ACX114EUQ belongs to Diodes' Automotive-Grade Pre-Biased Transistor (PBT) product line, engineered specifically for simplified, reliable, and space-efficient digital switching in harsh-environment automotive and industrial control systems.

FAQ

What is the maximum allowable continuous power dissipation for ACX114EUQ on a standard FR4 PCB?

The ACX114EUQ has a total power dissipation limit of 270 mW at +25 °C ambient, derating linearly at 0.6 mW/°C above that temperature. This rating assumes minimum recommended copper pad layout per Diodes' SOT363 footprint guidelines and accounts for both transistors operating simultaneously under worst-case bias conditions.

Can ACX114EUQ be used in a push-pull configuration driving a capacitive load?

Yes - the matched NPN/PNP structure and symmetric V_I(ON)/V_I(OFF) thresholds allow clean push-pull operation. However, ensure gate capacitance does not exceed 100 pF and limit slew rate with series resistance, as f_T = 250 MHz applies only to small-signal AC performance, not switching transient robustness.

Does ACX114EUQ require external pull-up or pull-down resistors on its input pins?

No - the integrated 10 kΩ base resistors eliminate need for external biasing. Inputs (pins 2 and 6) accept direct connection to CMOS/TTL logic outputs. External pull-ups are only needed if open-drain or floating-source drive is used, which is not typical for this device's intended use case.

Is the SOT363 package of ACX114EUQ compatible with standard reflow profiles for lead-free soldering?

Yes - the device is fully RoHS-compliant and rated for JEDEC J-STD-020 moisture sensitivity level 1. It supports standard lead-free reflow profiles with peak temperatures up to 260 °C, provided the board assembly follows Diodes' recommended thermal profile and avoids exceeding 270 mW total power during post-reflow functional test.