Diodes Incorporated DDTC114GKA-7-F

Overview

DDTC114GKA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor with built-in R2 bias resistor (10 kΩ), SC-59 package, V_CEO = 50 V, I_C(max) = 100 mA, and h_FE = 30–100 at I_C = 5 mA, used in digital switching and level-shifting circuits in portable power management.

For engineers reviewing the DDTC114GKA-7-F datasheet, DDTC114GKA-7-F pinout, DDTC114GKA-7-F application, or DDTC114GKA-7-F equivalent, key selection criteria include verified R2-only bias topology, SC-59 thermal performance (R_θJA = 625 °C/W), guaranteed V_CE(sat) ≤ 0.3 V at I_C/I_B = 10, and JEDEC-compliant lead-free plating.

Technical Context

This device implements a single-NPN transistor with monolithic integration of only the base-emitter pull-down resistor R2 (10 kΩ nominal), eliminating external bias components in saturated-switch configurations. It operates with V_EB ≤ 4 V and supports I_EBO = 300–580 μA at V_EB = 4 V.

The SC-59 package enables surface-mount assembly on FR4 PCBs with defined pad layout per AP02001, delivering 200 mW power dissipation and -55 to +150 °C operating range. Its f_T = 250 MHz supports high-speed digital edge transitions without oscillation risk.

Key Specifications

Pinout & Package

Package: SC-59 - 3-lead surface-mount plastic package (JEDEC TO-236AB), 0.006 g weight, UL 94V-0 rated, moisture sensitivity Level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTC114YKA-7-F, this part trades gain and saturation voltage for broader h_FE distribution and proven thermal stability in SC-59; versus NSV11201MR6T1G, it delivers 33% higher power rating and 14% lower thermal resistance in identical bias configuration.

Availability

DDTC114GKA-7-F is available at Aetrix Electronics and suitable for LED driver interfaces, microcontroller GPIO expansion, and power rail enable switching requiring stable component supply, consistent R2 tolerance, and JEDEC-qualified lead-free reliability.

Supply support for DDTC114GKA-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 centers across Asia and manufacturing in China, Taiwan, and Malaysia.

This device belongs to the DDTC R2-Only Series - a family of pre-biased transistors engineered specifically for reducing component count in digital logic interfacing, portable power control, and space-constrained consumer electronics.

FAQ

What is the function of the internal R2 resistor in DDTC114GKA-7-F?

The internal R2 resistor (10 kΩ ±30%) connects between base and emitter, providing automatic turn-off biasing without external components. It ensures the transistor remains fully OFF when the base is left floating or driven low, critical for fail-safe digital switching in MCU interfaces and power enable circuits.

Can DDTC114GKA-7-F replace a standard 2N3904 with external base resistor?

Yes, but only in saturated-switch applications where base drive current is ≥0.5 mA and V_CE(sat) ≤ 0.3 V is acceptable. Unlike 2N3904, it lacks R1 and cannot operate in linear amplifier mode; its h_FE is specified only at I_C = 5 mA, not across full current range.

Is DDTC114GKA-7-F suitable for 5 V logic interfacing with 3.3 V microcontrollers?

Yes - with V_BE(on) ≈ 0.7 V and R2 = 10 kΩ, a 3.3 V GPIO drives ~260 µA into the base, sufficient to saturate the transistor at I_C up to 26 mA (h_FE ≥30). Verified operation confirmed at I_C = 10 mA, V_CE(sat) ≤ 0.3 V per datasheet Fig. 2.

Does the SC-59 package support automated optical inspection (AOI) after reflow?

Yes - the SC-59 package has coplanar leads with defined dimensions (A = 0.35–0.50 mm, K = 1.00–1.30 mm) and matte tin finish, meeting IPC-A-610 Class 2 reflectivity and contrast requirements for AOI systems. Lead geometry and marking code "N26" are machine-readable post-reflow.