Diodes Incorporated DDTA114TCA-7-F

Overview

DDTA114TCA-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT23 package with integrated 10 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 enables compact, reliable switching in low-power digital interface and level-shifting circuits.

For engineers reviewing the DDTA114TCA-7-F datasheet, DDTA114TCA-7-F pinout, DDTA114TCA-7-F application, or DDTA114TCA-7-F equivalent, key selection criteria include verified R1-only biasing topology, guaranteed −50 V breakdown ratings, SOT23 thermal derating behavior, and automotive-grade qualification path via AEC-Q101.

Technical Context

This device implements a monolithic PNP bipolar junction transistor with a single external-base resistor (R1) embedded in the die structure-no internal R2-making it suitable for fixed-gain, current-limited switching where base drive simplicity and board space reduction are prioritized over adjustable bias networks.

Its −50 V V_CEO and −50 V V_CBO support operation in 24 V industrial control rails and 12 V automotive domains; the 250 MHz f_T confirms usable bandwidth for signal switching up to ~10 MHz, while the −0.3 V V_CE(sat) at I_C/I_B = −5 mA/−0.5 mA ensures low conduction loss in active saturation.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic package with 3 terminals, 0.008 g mass, UL 94V-0 rated molding compound, and matte tin-plated leads compliant with MIL-STD-202.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA124TCA-7-F, this part delivers higher base drive for faster turn-on at same V_IN; versus DDTC114TCA-7-F, it provides inverted logic control and direct compatibility with high-side sourcing architectures.

Availability

DDTA114TCA-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, and industrial sensor output stages requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for DDTA114TCA-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.

The DDTA (R1-only series) CA product line delivers pre-biased PNP transistors optimized for space-constrained, cost-sensitive switching applications in automotive, industrial, and consumer electronics-emphasizing simplified design, AEC-Q101 readiness, and green material compliance.

FAQ

What is the function of the internal 10 kΩ resistor in DDTA114TCA-7-F?

The internal 10 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 PCB layout, reduces BOM count, and ensures consistent turn-on behavior across temperature and process variation, with I_B ≈ (V_IN − V_BE) / 10 kΩ under typical drive conditions.

Can DDTA114TCA-7-F replace a standard PNP transistor like BC807 in existing designs?

Yes, but only if the circuit relies on fixed base biasing and does not require adjustable gain or dual-resistor (R1+R2) bias networks. DDTA114TCA-7-F has identical SOT23 pinout (E-B-C) and comparable V_CEO/I_C ratings, but its integrated R1 means external base resistors must be removed to avoid double-biasing and unintended saturation behavior.

Is DDTA114TCA-7-F qualified for automotive applications?

DDTA114TCA-7-F is manufactured in IATF 16949-certified facilities and supports AEC-Q101 qualification upon request with full PPAP documentation. While the standard part is not pre-qualified, Diodes Incorporated confirms it meets all stress test requirements for automotive use, including temperature cycling, HTRB, and ESD robustness per AEC-Q101 Rev D.

How does the SOT23 package affect thermal performance in continuous operation?

With Rθ_JA = 625 °C/W on a standard FR4 board, DDTA114TCA-7-F dissipates up to 200 mW at +25°C ambient. At 100 mW dissipation, junction temperature rises ~62.5°C above ambient-well within the −55°C to +150°C operating range. Derating begins linearly above +25°C, reaching zero power at +150°C ambient per the published derating curve.