Diodes Incorporated DDTA113TUA-7

Overview

DDTA113TUA-7 from Diodes Incorporated is a PNP pre-biased transistor in SOT323 package with built-in 1 kΩ base resistor (R1 only), −50 V V_CEO, −100 mA I_C, 200 mW power dissipation, and h_FE of 100–600 at I_C = −1 mA. It serves as a compact, RoHS-compliant switching element in low-power digital interface and level-shifting circuits.

For engineers reviewing the DDTA113TUA-7 datasheet, DDTA113TUA-7 pinout, DDTA113TUA-7 application, or DDTA113TUA-7 equivalent, key selection criteria include verified R1-only biasing topology, guaranteed V_CE(sat) ≤ −0.3 V at I_C/I_B = −10 mA/−1 mA, thermal resistance of 625 °C/W on FR4, and AEC-Q101 readiness for automotive signal conditioning.

Technical Context

This device implements a monolithic PNP bipolar junction transistor with a single integrated 1 kΩ base-emitter pull-up resistor (R1), eliminating external bias components. Its epitaxial planar die construction ensures stable gain (h_FE = 100–600) and low saturation voltage across −55 °C to +150 °C operating range.

Designed for discrete logic-level switching, it operates with fixed base current control-no external base resistor required-and delivers predictable turn-on behavior under I_C/I_B = −10 mA/−1 mA test conditions. The SOT323 package supports high-density PCB layouts while maintaining JEDEC-standard thermal derating.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), moisture sensitivity level 1, matte tin-plated leads, weight ≈ 0.006 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA113TUA-7, DDTA113ZCA-7 trades miniaturization for thermal headroom, while NSV113T1T1G adds qualification rigor and tighter R1 tolerance at the cost of broader availability and higher unit price.

Availability

DDTA113TUA-7 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input conditioning, and medical infusion pump status indication requiring stable component supply and RoHS-compliant sourcing.

Supply support for DDTA113TUA-7 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 DDTA R1-only series targets cost-sensitive, high-volume applications needing simplified BJT biasing-especially in automotive body electronics, industrial controls, and consumer interfaces where SOT323 size and lead-free compliance are essential.

FAQ

What is the function of the built-in R1 resistor in DDTA113TUA-7?

The integrated 1 kΩ resistor connects internally between base and emitter (R1-only topology), enabling direct logic-level control without external bias components. It sets base current when a voltage is applied to the base terminal, allowing the transistor to saturate predictably at I_C/I_B = −10 mA/−1 mA. This eliminates two external resistors typically used in conventional PNP switch configurations.

Can DDTA113TUA-7 replace a standard PNP BJT like BC807 in existing designs?

Yes, but only if the circuit relies on base-current-driven switching and can accommodate the fixed R1 bias network. Unlike BC807, DDTA113TUA-7 cannot be used in linear amplifier modes or with adjustable base bias. Designers must verify that the 1 kΩ R1 provides appropriate I_B for the target I_C and that V_CE(sat) meets system voltage margin requirements.

Is DDTA113TUA-7 qualified for automotive applications?

DDTA113TUA-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101 out-of-box, Diodes offers AEC-Q101 testing and qualification upon request for specific part numbers in this family-including DDTA113TUA-7-when ordered with automotive-grade traceability and change control.

What is the maximum operating temperature for continuous operation?

The DDTA113TUA-7 has an operating junction temperature range of −55 °C to +150 °C. For continuous operation at full 200 mW power dissipation, ambient temperature must remain ≤ +75 °C on standard FR4 PCB per the derating curve in DS30327 Rev. 7–2. At 100 °C ambient, maximum allowed power drops to ~125 mW.