Diodes Incorporated DDTA123EUA-7

Overview

DDTA123EUA-7 from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT-323 package, featuring integrated bias resistors R1 = R2 = 2.2 kΩ, −50 V V_CEO, −100 mA I_C(max), and DC current gain (h_FE) of −20 at −20 mA/−5 V. It functions as a digital switch or level translator in low-power logic interface circuits.

For engineers reviewing the DDTA123EUA-7 datasheet, DDTA123EUA-7 pinout, DDTA123EUA-7 application, or DDTA123EUA-7 equivalent, key selection criteria include input voltage thresholds (V_IN(on) = −1.9 V typ, V_IN(off) = −1.1 V typ), output saturation voltage (V_CE(sat) = −0.1 V typ at −10 mA), resistor tolerance (±30%), and thermal resistance (625 °C/W).

Technical Context

This device integrates two matched 2.2 kΩ bias resistors (R1 = R2) to enable single-resistor-base drive configuration, eliminating external bias components. Its PNP topology supports active-low switching with grounded emitter and collector-connected load.

Designed for surface-mount logic interfacing, it operates across −55 °C to +150 °C, delivers 250 MHz f_T (transistor only), and maintains stable DC current gain (G_L = −20) under −20 mA I_C and −5 V V_CE conditions.

Key Specifications

Pinout & Package

Package: SOT-323 - ultra-small surface-mount plastic package (2.20 mm × 1.35 mm × 0.40 mm), RoHS-compliant, moisture sensitivity level 1, UL 94V-0 rated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA123JU-7, the DDTA123EUA-7 offers identical functionality with verified Green Molding Compound compliance; versus NSV123EUT1G, it trades 10 V voltage margin and 125 °C/W thermal resistance for tighter cost control and established qualification history in consumer-grade applications.

Availability

DDTA123EUA-7 is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control module, and consumer appliance control board applications requiring stable component supply and long-term production continuity.

Supply support for DDTA123EUA-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, specializing in high-reliability, energy-efficient components for industrial, automotive, and consumer markets.

The DDTA series belongs to Diodes' pre-biased transistor product line, engineered specifically for space-constrained logic interface and digital switching applications where board area and assembly cost reduction are critical.

FAQ

What is the maximum operating temperature for DDTA123EUA-7?

The DDTA123EUA-7 is rated for junction and storage temperatures from −55 °C to +150 °C. Its thermal resistance (R_θJA) is 625 °C/W on FR4 with Diodes' recommended pad layout (AP02001), allowing full 200 mW power dissipation only below +85 °C ambient in standard mounting.

Can DDTA123EUA-7 replace a standard PNP BJT like BC807?

Yes, but only in digital switching applications where its built-in 2.2 kΩ base resistors match the required biasing. Unlike BC807, it cannot be used in linear amplifier configurations due to fixed R1/R2 network and lack of independent base terminal access.

Is DDTA123EUA-7 compatible with lead-free reflow profiles?

Yes - it is RoHS-compliant with matte tin plating over Alloy 42 leadframe and qualified for standard JEDEC J-STD-020C lead-free reflow. Its moisture sensitivity level is 1, meaning it can be stored indefinitely at ≤30 °C/60% RH without baking prior to assembly.

What does the "EUA" suffix indicate in DDTA123EUA-7?

The "EUA" suffix denotes the SOT-323 package variant with Green Molding Compound (halogen-free, antimony-free), compliant with Diodes' environmental policy effective from date code 0627 onward. It distinguishes this version from earlier non-Green variants using brominated flame retardants.