Diodes Incorporated DDTA123TCA-7-F

Overview

DDTA123TCA-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT23 package with integrated 2.2 kΩ base bias 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, lead-free switching element in low-power digital interface and level-shifting circuits.

For engineers reviewing the DDTA123TCA-7-F datasheet, DDTA123TCA-7-F pinout, DDTA123TCA-7-F application, or DDTA123TCA-7-F equivalent, key selection criteria include verified R1-only bias topology, guaranteed −0.3 V V_CE(sat) at −10 mA/−1 mA drive, SOT23 thermal performance (R_θJA = 625 °C/W), and AEC-Q101 readiness for automotive signal conditioning.

Technical Context

This device implements a monolithic PNP bipolar junction transistor with a single external-base resistor (R1 = 2.2 kΩ ±30%), eliminating need for discrete bias components. Its epitaxial planar die construction ensures stable h_FE across −55 °C to +150 °C operating range and supports fast switching via 250 MHz f_T at V_CE = −10 V, I_E = −5 mA.

The SOT23 package enables high-density PCB layout with JEDEC-compliant pad geometry and moisture sensitivity level 1 handling. Designed for direct replacement of discrete BJT + resistor combinations, it reduces BOM count while maintaining full compatibility with standard reflow profiles and MIL-STD-202 solderability requirements.

Key Specifications

Pinout & Package

Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, 0.008 g weight, UL 94V-0 rating, and J-STD-020 Level 1 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA123JCA-7-F, this part trades guaranteed high-gain assurance for broader h_FE distribution (100–600), reducing cost in non-critical switching roles; versus NSVDDTA123TWT1G, it provides identical electrical behavior at lower price and higher stock availability for commercial/industrial use cases.

Availability

DDTA123TCA-7-F is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input conditioning, and consumer appliance backlight control requiring stable component supply, RoHS 3 compliance, and AEC-Q101-aligned manufacturing traceability.

Supply support for DDTA123TCA-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 device belongs to the DDTA (R1-ONLY SERIES) CA product line, engineered specifically to replace discrete BJT + resistor combinations in space-constrained, high-reliability signal-switching applications across automotive, industrial, and consumer electronics.

FAQ

What is the function of the internal resistor in DDTA123TCA-7-F?

The internal 2.2 kΩ resistor (R1) connects the base to the emitter, forming a fixed-current bias network that eliminates the need for an external base resistor. This simplifies circuit design, improves assembly yield, and ensures consistent turn-on characteristics across temperature and process variation without requiring manual resistor selection or placement.

Is DDTA123TCA-7-F qualified for automotive applications?

Yes - DDTA123TCA-7-F is manufactured in IATF 16949-certified facilities and meets AEC-Q101 stress testing requirements. While not pre-qualified for PPAP submission out-of-box, Diodes Incorporated confirms its suitability for automotive signal-path applications including body electronics, lighting controls, and sensor interfaces when used within its specified absolute maximum ratings.

How does the SOT23 package affect thermal performance?

Mounted on FR4 with minimum recommended pad layout, the SOT23 package delivers R_θJA = 625 °C/W. This allows continuous operation at −50 mA collector current up to +70 °C ambient without thermal derating. The 0.008 g mass and 94V-0 mold compound also support automated optical inspection and high-reliability reflow profiles.

Can DDTA123TCA-7-F replace a standard PNP BJT like BC807?

No - DDTA123TCA-7-F is not a drop-in replacement for BC807 because it integrates a base-emitter resistor and lacks a standalone base terminal. It replaces a BC807 + 2.2 kΩ resistor combination. Direct substitution requires verifying that the existing circuit relies on external biasing and adjusting layout to accommodate the three-terminal SOT23 footprint with base tied internally to emitter via R1.