Diodes Incorporated DDA143TUQ-7-F

Overview

DDA143TUQ-7-F from Diodes Incorporated is a PNP pre-biased dual transistor in SOT363 package, featuring integrated 4.7kΩ input bias resistor (R1), −50V V_CEO, −100mA I_C(max), and AEC-Q101 qualification for automotive use. It functions as a compact, RoHS-compliant switching element in low-power logic interface and signal-level translation circuits.

For engineers reviewing the DDA143TUQ-7-F datasheet, DDA143TUQ-7-F pinout, DDA143TUQ-7-F application, or DDA143TUQ-7-F equivalent, this part supports high-reliability automotive signal conditioning where built-in biasing simplifies PCB layout, reduces component count, and ensures stable turn-on at −1.1V V_IN(on) with −100μA I_O(off).

Technical Context

This dual PNP transistor integrates two identical pre-biased elements sharing common emitter connections per channel, enabling independent switching control with matched h_FE (100–250) and V_CE(sat) ≤ −0.3V at I_C/I_B = −1mA/−0.1mA. Its SOT363 package supports thermal resistance of 625°C/W and operates across −55°C to +150°C.

The device uses epitaxial planar die construction and features halogen- and antimony-free "Green" molding compound (UL 94V-0). It meets AEC-Q101 stress testing requirements and is manufactured in IATF 16949 certified facilities, supporting PPAP documentation for automotive OEM programs.

Key Specifications

Pinout & Package

SOT363 is a 6-pin, surface-mount, lead-free plastic package with matte tin-plated leads, moisture sensitivity level 1, and approximate weight of 0.006 g. Dimensions conform to JEDEC MO-178AA standard (D = 2.15 mm, E = 2.10 mm, e = 0.65 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDA143TU-7-F, the Q-suffix version adds AEC-Q101 validation and IATF 16949 traceability-critical for Tier 1 automotive sourcing-while DDA114TUQ-7-F trades lower R1 for higher input impedance, shifting optimal use from medium-drive to high-impedance logic interfaces.

Availability

DDA143TUQ-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and USB-C power management systems requiring stable component supply, long-term lifecycle assurance, and full AEC-Q101 compliance.

Supply support for DDA143TUQ-7-F 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.

This part belongs to Diodes' DDA-series pre-biased transistor family, engineered specifically for automotive and industrial signal switching applications where integrated biasing, AEC-Q101 reliability, and SOT363 space efficiency are essential.

FAQ

What is the function of the Q suffix in DDA143TUQ-7-F?

The Q suffix indicates AEC-Q101 qualification, PPAP capability, and manufacture in IATF 16949 certified facilities. It confirms compliance with automotive stress testing standards-including temperature cycling, HTRB, and ESD-and enables formal change control documentation required by Tier 1 suppliers.

Can DDA143TUQ-7-F replace a discrete PNP transistor plus two resistors?

Yes-it integrates two matched PNP transistors each with a 4.7kΩ base resistor, directly replacing two discrete transistors and four external resistors. This reduces footprint by ~40%, eliminates resistor matching tolerances, and improves thermal coupling between channels in shared-load applications.

What is the maximum safe operating current per channel?

The absolute maximum continuous collector current is −100 mA per transistor. However, at ambient temperatures above +25°C, derating applies: power dissipation must stay ≤200 mW total, and junction temperature must remain ≤+150°C. At +85°C ambient, max usable I_C drops to ~−60 mA per channel with proper PCB copper area.

Is the SOT363 package compatible with standard reflow profiles?

Yes-SOT363 is moisture sensitivity level 1 (MSL-1), meaning it can be stored indefinitely at ≤30°C/60% RH and processed using standard Pb-free reflow profiles (peak 260°C, 20–40 sec above 217°C). Diodes recommends following IPC-J-STD-020 guidelines and verifying solder joint integrity via cross-section analysis for automotive production.