Diodes Incorporated DDTA124TE-7-F

Overview

DDTA124TE-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT523 package with built-in 22 kΩ base bias resistor (R1 only), V_CEO = −50 V, I_C = −100 mA peak pulse, V_CE(sat) = −0.3 V at I_C/I_B = −2.5 mA/−0.25 mA, and h_FE = 100–600. It enables compact, reliable digital switching in low-power logic interface circuits.

For engineers reviewing the DDTA124TE-7-F datasheet, DDTA124TE-7-F pinout, DDTA124TE-7-F application, or DDTA124TE-7-F equivalent, key selection criteria include its single-R1 bias topology, SOT523 footprint compatibility, guaranteed V_CE(sat) under defined drive conditions, and AEC-Q101 readiness for automotive signal conditioning.

Technical Context

This device integrates a PNP bipolar junction transistor with a monolithic 22 kΩ pull-up base resistor (R1), eliminating external bias components. It operates as a digital switch with fixed current gain control and exhibits stable saturation behavior across −55°C to +150°C.

The SOT523 package supports high-density PCB layouts and delivers 150 mW power dissipation with 833°C/W junction-to-ambient thermal resistance on standard FR4. Its −50 V V_CEO rating and −0.3 V V_CE(sat) support robust interfacing between 3.3 V/5 V logic and moderate-voltage loads.

Key Specifications

Pinout & Package

SOT523 is a 3-terminal surface-mount plastic package measuring 1.60 mm × 1.60 mm × 0.75 mm (L × W × H), with matte tin-plated leads, moisture sensitivity level 1, and UL 94V-0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA124TE-7-F, DDTA124TK-7 offers greater thermal headroom in a less compact form factor, while NSV12400MT1G trades off voltage rating for improved conduction efficiency at higher drive levels-making each suitable for distinct voltage, space, and thermal constraints.

Availability

DDTA124TE-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive door modules, and consumer appliance control requiring stable component supply and long-term manufacturability.

Supply support for DDTA124TE-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 the Americas.

This part belongs to the DDTA R1-only pre-biased transistor product line, engineered specifically for space-constrained digital switching applications where simplified biasing and AEC-Q101 readiness are essential.

FAQ

What is the function of the internal 22 kΩ resistor in DDTA124TE-7-F?

The internal 22 kΩ resistor (R1) connects between the base and emitter terminals, providing fixed base bias current when the collector is pulled low. This eliminates the need for an external resistor and ensures reliable transistor saturation with standard 3.3 V or 5 V logic inputs, simplifying circuit design and improving production consistency.

Can DDTA124TE-7-F be used in automotive applications?

Yes-DDTA124TE-7-F is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, Diodes provides change control and qualification support for automotive programs; customers should engage their local Diodes representative to initiate AEC-Q101 stress testing and certification.

How does the SOT523 package affect thermal performance?

The SOT523 package delivers 150 mW power dissipation with 833°C/W junction-to-ambient thermal resistance on a 15 mm × 15 mm FR4 board with 1 oz copper. Its small size limits absolute power handling but enables high-density routing; derating to 100 mW is recommended above 75°C ambient to maintain reliability.

Is there a complementary NPN version of this device?

Yes-the DDTC124TE-7-F is the complementary NPN pre-biased transistor with identical 22 kΩ R1 value, SOT523 package, and matching electrical specifications (V_CEO = 50 V, V_CE(sat) = 0.3 V, h_FE = 100–600), enabling balanced push-pull or dual-rail logic interface designs.