Diodes Incorporated DDA143TUQ-13-F

Overview

DDA143TUQ-13-F from Diodes Incorporated is a PNP pre-biased dual transistor in SOT363 package, featuring integrated 4.7 kΩ input bias resistor (R1), −50 V collector-base breakdown voltage, −100 mA maximum output current per element, and AEC-Q101 qualification for automotive applications including body control modules and LED driver circuits.

For engineers reviewing the DDA143TUQ-13-F datasheet, DDA143TUQ-13-F pinout, DDA143TUQ-13-F application, or DDA143TUQ-13-F equivalent, this device serves as a space-saving, RoHS-compliant, dual-channel switching solution with verified thermal performance (R_θJA = 625 °C/W) and defined input logic thresholds (V_IN(on) = −3.0 V, V_IN(off) = −1.1 V) under automotive ambient conditions.

Technical Context

This dual PNP transistor integrates two identical pre-biased elements in one SOT363 package, each with a dedicated 4.7 kΩ base-input resistor (R1) and no external R2 - confirmed by ordering table and schematic labeling. It operates with guaranteed V_CE(sat) ≤ −0.3 V at I_C/I_B = −1 mA / −0.1 mA and supports −55 °C to +150 °C junction temperature range.

The device implements epitaxial planar die construction and is fully halogen- and antimony-free ("Green"), with matte tin-plated leads solderable per MIL-STD-202. Its absolute maximum ratings include −50 V supply voltage across pins 1–6 and 4–3, and −100 mA per channel output current, validated in DS30346 Rev. 14-2.

Key Specifications

Pinout & Package

Package: SOT363 - 6-pin, surface-mount, molded plastic package with 0.65 mm lead pitch, 2.15 mm × 2.10 mm body size, and 0.95 mm height; UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDA143TUQ-13-F, DDA143TU-7-F offers identical performance in smaller packaging, while DDA114TUQ-13-F trades drive strength for input impedance - making the former ideal for volume production and the latter for low-power logic buffering.

Availability

DDA143TUQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and appliance motor control applications requiring stable component supply and long-term lifecycle assurance.

Supply support for DDA143TUQ-13-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 the DDA-series pre-biased transistor family, engineered specifically for automotive and industrial switching applications where space, reliability, and AEC-Q101 compliance are mandatory.

FAQ

Is DDA143TUQ-13-F pin-compatible with DDC143TUQ-13-F?

No. DDA143TUQ-13-F is a dual PNP device, while DDC143TUQ-13-F is its complementary dual NPN counterpart. Their pinouts are mirror images: DDA uses pins 1–3 for first PNP and 4–6 for second, whereas DDC assigns pins 1–3 to first NPN and 4–6 to second - requiring PCB redesign for substitution.

What is the maximum allowable continuous current per channel at 85 °C ambient?

At T_A = 85 °C, derating from 200 mW total power dissipation applies. With R_θJA = 625 °C/W, junction temperature rise is 625 × 0.2 = 125 °C - exceeding max T_J = 150 °C. Using linear derating, max power at 85 °C is (150 − 85)/625 = 104 mW total, so max I_O ≈ 72 mA per channel assuming V_CE(sat) = −0.3 V.

Does DDA143TUQ-13-F require external pull-down resistors on its base inputs?

No. Each base (pins 2 and 5) connects internally to its respective emitter (pins 1 and 4) through a 4.7 kΩ resistor. This built-in bias network ensures defined logic-low state without external components, eliminating floating input risk and simplifying PCB layout.

Can DDA143TUQ-13-F be used in DC-DC converter feedback paths?

No. This device is a switching transistor, not a precision amplifier or comparator. Its h_FE variation (100–250), lack of guaranteed gain linearity, and absence of frequency compensation make it unsuitable for closed-loop analog feedback - use dedicated error amplifiers or optocouplers instead.