Diodes Incorporated DDTA115GCA-7

Overview

DDTA115GCA-7 from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT-23 package, featuring a built-in 100 kΩ bias resistor (R2 only), −50 V V_CEO, −100 mA I_C(max), and h_FE = 82 at I_C = −5 mA, V_CE = −5 V. It is AEC-Q101 qualified and used in automotive body control modules for discrete load switching.

For engineers reviewing the DDTA115GCA-7 datasheet, DDTA115GCA-7 pinout, DDTA115GCA-7 application, or DDTA115GCA-7 equivalent, this page provides verified electrical parameters, terminal roles, RoHS-compliant packaging details, and validated automotive-grade alternatives with documented R2 tolerance and saturation voltage behavior.

Technical Context

This device implements a single PNP bipolar junction transistor with an integrated base-emitter pull-up resistor (R2 = 100 kΩ ±30%), eliminating external bias components. It operates with V_EB(max) = −5 V and delivers V_CE(sat) ≤ −0.3 V at I_C = −10 mA / I_B = −0.5 mA.

The epitaxial planar die construction ensures stable h_FE across −55°C to +150°C, and its 200 mW power dissipation rating is defined under JEDEC-standard FR4 board conditions with specified pad layout.

Key Specifications

Pinout & Package

Package: SOT-23 - Surface-mount plastic package (2.30–2.50 mm length, 1.20–1.40 mm width, 0.37–0.51 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 PNP pre-biased transistor applications.

Compared with DDTA115GCA-7, DDTA144GCA-7 offers lower R2 for improved switching speed but increased base current, while NSVDDTA115MUT5G delivers tighter bias tolerance and extended cold-temperature stability-both retain pinout compatibility and automotive qualification.

Availability

DDTA115GCA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial HMI indicator circuits, and smart appliance fan control requiring stable component supply across production lifecycles.

Supply support for DDTA115GCA-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 centers across Asia and manufacturing in China, Taiwan, and the US.

The DDTA (R2-only) series targets cost-sensitive, space-constrained automotive and industrial switching applications where simplified biasing and AEC-Q101 reliability are mandatory.

FAQ

What is the function of the internal R2 resistor in DDTA115GCA-7?

The internal R2 resistor (100 kΩ ±30%) connects between base and emitter, providing fixed bias for PNP transistor operation. It enables direct logic-level control without external components, reduces PCB footprint, and ensures consistent turn-on behavior across temperature and process variation.

Can DDTA115GCA-7 replace a standard PNP transistor like BC807?

No-it cannot directly replace a bare PNP transistor because it lacks a base connection independent of R2. The integrated R2 fixes the base-emitter bias path, making it unsuitable for amplifier configurations or circuits requiring adjustable base current. It is designed exclusively for digital switching applications.

Is DDTA115GCA-7 suitable for 24 V industrial control inputs?

Yes-its −50 V V_CEO and −50 V V_CBO ratings safely accommodate 24 V systems with typical transients (e.g., ISO 7637-2 Pulse 1/2a). Derating is not required below 100 mA load current, and its 150°C T_J(max) supports operation in enclosed enclosures.

Does DDTA115GCA-7 require a heatsink in typical applications?

No-heatsinking is unnecessary. At 100 mA and V_CE(sat) = −0.3 V, power dissipation is 30 mW. With R_θJA = 625°C/W on FR4, temperature rise is ~19°C above ambient-well within safe operating limits without additional thermal management.