Diodes Incorporated ACX114YUQ-7R

Overview

ACX114YUQ-7R from Diodes Incorporated is a small-signal complementary pre-biased dual transistor in SOT363 package, integrating one NPN and one PNP transistor with built-in 10 kΩ and 47 kΩ bias resistors. It supports ±50 V supply voltage, delivers ±100 mA max collector current, operates from −55 °C to +150 °C, and is AEC-Q101 qualified for automotive signal switching applications.

For engineers reviewing the ACX114YUQ-7R datasheet, ACX114YUQ-7R pinout, ACX114YUQ-7R application, or ACX114YUQ-7R equivalent, key selection criteria include verified dual-polarity pre-biasing, guaranteed R1/R2 tolerance (±30% / ±20%), h_FE ≥ 80 per section, f_T = 250 MHz, and automotive-grade thermal derating on FR4 board.

Technical Context

This device implements two monolithically integrated, complementary bipolar junction transistors on a single epitaxial planar die, each with dedicated base bias networks. The NPN section features V_CC = +50 V, I_C(max) = +100 mA, and V_CE(SAT) ≤ 0.3 V at I_O/I_L = 5 mA/0.25 mA; the PNP section mirrors these with V_CC = −50 V, I_C(max) = −100 mA, and symmetric V_CE(SAT).

Thermal performance is defined for minimum-copper FR4 mounting: R_θJA = 450 °C/W, P_D = 270 mW absolute max (150 mW per element), with linear derating above +25 °C. Input voltage thresholds are specified as V_I(OFF) = ±0.3 V and V_I(ON) = ±1.4 V under defined load conditions.

Key Specifications

Pinout & Package

SOT363 (SC-70-6) surface-mount plastic package: 2.15 mm × 2.10 mm × 1.00 mm body, matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSBC114YTW and UMX11N, ACX114YUQ-7R uniquely delivers verified complementary polarity, full ±50 V capability, and AEC-Q101 qualification in one package-making it the only drop-in solution for automotive bidirectional load control without redesign.

Availability

ACX114YUQ-7R is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, USB-C power delivery subsystems, and smart lighting control requiring stable component supply and long-term lifecycle assurance.

Supply support for ACX114YUQ-7R 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, specializing in high-reliability components for automotive, industrial, and consumer markets.

The ACX114YUQ belongs to Diodes' AEC-Q101-qualified pre-biased transistor product line, engineered specifically for space-constrained, high-volume automotive signal switching where reliability and assembly efficiency are critical.

FAQ

What is the maximum allowable continuous power dissipation per transistor element?

The datasheet specifies a maximum of 150 mW per element (NPN or PNP section), with total package dissipation limited to 270 mW. This constraint applies when mounted on a minimum-copper FR4 board; exceeding 150 mW per section risks thermal runaway even if total power remains below 270 mW. Derating begins linearly above +25 °C ambient.

Can ACX114YUQ-7R be used in a push-pull output stage without external biasing?

Yes-the integrated 10 kΩ and 47 kΩ resistors provide complete base biasing for both transistors. When configured with pin 1 (NPN emitter) grounded and pin 3 (PNP emitter) tied to V_CC, the device functions as a true complementary push-pull driver with no external resistors required for basic on/off control.

Is the SOT363 package compatible with standard reflow soldering profiles?

Yes-SOT363 is rated for JEDEC J-STD-020 moisture sensitivity level 1 and supports peak reflow temperatures up to 260 °C. The matte tin-plated leads meet MIL-STD-202 Method 208 solderability requirements, and the package has been validated for compatibility with Type 3 and Type 4 solder pastes in standard convection reflow processes.

How does the ±30% R1 tolerance affect switching threshold consistency?

The ±30% tolerance on the 10 kΩ input resistor shifts the effective V_I(ON) threshold by approximately ±0.2 V around the nominal 1.4 V point. This is accounted for in the datasheet's guaranteed V_I(ON) range (≤1.4 V) and ensures reliable turn-on across process and temperature extremes without requiring recalibration.