Diodes Incorporated DDTA113TKA-7-F

Overview

DDTA113TKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor with integrated 1 kΩ base bias resistor (R1 only), SC-59 package, -50 V V_CEO, -100 mA I_C, and h_FE of 100–600 at I_C = -1 mA. It enables simplified high-side switching in compact DC-DC feedback loops and LED current control circuits.

For engineers reviewing the DDTA113TKA-7-F datasheet, DDTA113TKA-7-F pinout, DDTA113TKA-7-F application, or DDTA113TKA-7-F equivalent, key selection criteria include verified R1 tolerance (±30%), guaranteed V_CE(sat) ≤ -0.3 V at I_C/I_B = -10 mA/-1 mA, SC-59 thermal resistance (625 °C/W), and RoHS-compliant matte tin plating over copper leadframe.

Technical Context

This device integrates a single 1 kΩ pull-up resistor (R1) between base and emitter, eliminating external bias components for PNP switch operation. Its epitaxial planar die construction ensures stable h_FE across -55 °C to +150 °C and supports fast switching with f_T = 250 MHz under V_CE = -10 V, I_E = 5 mA conditions.

The SC-59 package provides 0.008 g mass, UL 94V-0 flammability rating, and moisture sensitivity level 1 compliance. Terminal connections follow standardized 3-pin configuration (Emitter=Pin 1, Base=Pin 2, Collector=Pin 3), with solderability validated per MIL-STD-202, Method 208.

Key Specifications

Pinout & Package

Package: SC-59 surface-mount plastic case (0.008 g), UL 94V-0 rated, moisture sensitivity level 1, with matte tin-plated copper leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA113ZCA-7 and NSV11300T1G, DDTA113TKA-7-F offers superior thermal performance (625 vs. 700 °C/W), tighter V_CE(sat) guarantee (-0.3 V), and higher minimum h_FE (100), making it optimal for thermally constrained, precision-switching designs.

Availability

DDTA113TKA-7-F is available at Aetrix Electronics and suitable for LED current control, DC-DC feedback switching, and microcontroller GPIO expansion requiring stable component supply and full traceability.

Supply support for DDTA113TKA-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.

This part belongs to the DDTA R1-only pre-biased transistor series, designed specifically to reduce component count and layout complexity in high-side switching and signal conditioning circuits for consumer, computing, and industrial power systems.

FAQ

What is the function of the built-in R1 resistor in DDTA113TKA-7-F?

The built-in 1 kΩ resistor connects internally between base and emitter terminals, providing fixed bias for PNP transistor operation. This eliminates the need for an external base resistor, simplifying circuit design, reducing PCB area, and improving manufacturing yield in high-volume assembly. It is optimized for direct drive from standard logic-level outputs.

Can DDTA113TKA-7-F be used in place of a standard PNP transistor like BC807?

Yes, but only when the application benefits from integrated biasing and tolerates fixed R1 value. Unlike BC807, DDTA113TKA-7-F cannot be reconfigured for different bias points or linear amplification modes. Its use is optimized for saturated switching, not analog amplification, due to the fixed internal resistor and specified V_CE(sat) test conditions.

What does the "-7-F" suffix indicate in the part number?

The "-7-F" suffix denotes tape-and-reel packaging: "7" specifies 3000 units per reel, and "F" indicates lead-free, RoHS-compliant finish with matte tin plating over copper. This matches Diodes Incorporated's standard ordering code for SC-59 packaged devices shipped in industry-standard EIA-481 compliant carrier tape.

Is thermal derating required for continuous operation at ambient temperatures above 25°C?

Yes. With R_θJA = 625 °C/W and P_D = 200 mW at T_A = 25°C, power must be linearly derated above 25°C. For example, at 75°C ambient, maximum allowable power drops to 100 mW. Derating follows the curve in Figure 1 of DS30343 Rev. 7-2, based on FR4 board with Diodes' recommended pad layout.