Diodes Incorporated DDTC115TE-7-F

Overview

DDTC115TE-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with a single built-in 100 kΩ bias resistor (R1), rated for 50 V V_CEO, 100 mA I_C(MAX), and 150 mW power dissipation, commonly used in low-power digital switching and level-shifting circuits in automotive and industrial control modules.

For engineers reviewing the DDTC115TE-7-F datasheet, DDTC115TE-7-F pinout, DDTC115TE-7-F application, or DDTC115TE-7-F equivalent, key selection criteria include verified R1 tolerance (±30%), h_FE range (100–600), V_CE(sat) ≤ 0.3 V at I_C/I_B = 0.5 mA/0.05 mA, AEC-Q101 qualification, and SOT523 thermal resistance (833 °C/W).

Technical Context

This device integrates a monolithic NPN transistor with a precision laser-trimmed 100 kΩ base bias resistor (R1 only), eliminating external bias components and reducing PCB footprint. It operates as a digital switch with guaranteed saturation under defined I_C/I_B = 10 condition and supports stable DC current transfer across −55°C to +150°C.

The epitaxial planar die construction ensures consistent gain-bandwidth performance (f_T = 250 MHz) and low leakage (I_CBO, I_EBO ≤ 0.5 µA), while its "Green" halogen- and antimony-free molding compound meets automotive-grade environmental compliance requirements.

Key Specifications

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.55 mm), moisture sensitivity level 1, matte tin-plated terminals, UL 94V-0 rated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTC115TE-7-F, DDTC114TE-7-F offers lower R1 for stronger base drive at modest currents, while NSVD115FCT1G provides higher current capability and power rating in a different package-both require circuit validation for bias point and thermal performance.

Availability

DDTC115TE-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and consumer appliance control boards requiring stable component supply and long-term lifecycle support.

Supply support for DDTC115TE-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 distribution operations across Asia, Europe, and the Americas.

The DDTC (R1-ONLY SERIES) E product line delivers pre-biased transistors optimized for cost-sensitive, space-constrained digital switching in automotive, industrial, and consumer systems requiring AEC-Q101 qualification and green material compliance.

FAQ

What is the function of the internal 100 kΩ resistor in DDTC115TE-7-F?

The internal 100 kΩ resistor (R1) connects between the base and emitter terminals, forming a fixed bias network that eliminates the need for an external base resistor. It ensures predictable turn-on behavior with TTL- or CMOS-level input voltages, reduces component count, and improves manufacturing consistency in high-volume SMT assembly.

Is DDTC115TE-7-F suitable for automotive applications?

Yes-DDTC115TE-7-F is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. Its −55°C to +150°C operating range, halogen-free construction, and validated reliability data make it appropriate for non-safety-critical automotive functions such as lighting control, HVAC actuators, and infotainment peripheral switching.

How does the SOT523 package affect thermal performance?

The SOT523 package has a high thermal resistance of 833 °C/W (junction-to-ambient on FR-4), limiting continuous power dissipation to 150 mW at +25°C ambient. Designers must ensure adequate copper pour, avoid thermal islands, and verify junction temperature remains below +150°C under worst-case load and ambient conditions.

Can DDTC115TE-7-F replace a standard NPN transistor with external biasing?

Yes, but only if the external circuit uses a single base resistor matching the 100 kΩ value and tolerances. The integrated R1 fixes the bias topology-no emitter or collector resistors are included-so it replaces only R1-based configurations, not voltage-divider or active-bias designs. Layout and drive strength must be revalidated.