Diodes Incorporated DDTA123EKA-7-F

Overview

DDTA123EKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SC-59 package with integrated bias resistors (R1 = R2 = 2.2 kΩ), −50 V V_CEO, −100 mA I_C(max), and 200 mW power dissipation, used for level-shifting and digital switching in compact logic interface circuits.

For engineers reviewing the DDTA123EKA-7-F datasheet, DDTA123EKA-7-F pinout, DDTA123EKA-7-F application, or DDTA123EKA-7-F equivalent, key selection criteria include input voltage thresholds (V_IN(on) = −1.9 V typ), output saturation voltage (V_CE(sat) = −0.1 V typ at −10 mA), DC current gain (h_FE = 20 min), and thermal resistance (R_θJA = 625 °C/W).

Technical Context

This device integrates two matched 2.2 kΩ bias resistors (R1 = R2) to configure a single-transistor inverter with fixed base drive, eliminating external bias components. It operates as a saturated switch with guaranteed turn-on at V_IN ≤ −1.9 V and turn-off at V_IN ≥ −0.5 V under −5 V supply.

The SC-59 package supports surface-mount assembly on FR4 PCBs with recommended pad layout per AP02001, and its 625 °C/W junction-to-ambient thermal resistance defines maximum continuous power derating above 25 °C ambient.

Key Specifications

Pinout & Package

Package: SC-59 - Surface-mount plastic package with three terminals (Emitter, Base, Collector), UL 94V-0 rated, moisture sensitivity level 1, and lead-free matte tin plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA123JKA-7-F, this part offers lower guaranteed h_FE but identical biasing and switching thresholds; compared with NSV123EWT1G, it uses SC-59 instead of SOT-323, trading board area for broader thermal design flexibility and legacy layout compatibility.

Availability

DDTA123EKA-7-F is available at Aetrix Electronics and suitable for logic level translation, digital switching interfaces, LED driver control, and microcontroller peripheral interfacing requiring stable component supply across industrial, medical, and consumer electronics programs.

Supply support for DDTA123EKA-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, specializing in high-reliability, cost-optimized components for power management, signal integrity, and protection applications.

This part belongs to the DDTA R1 = R2 series of pre-biased transistors, designed specifically to simplify digital interface design by integrating matched bias resistors and ensuring robust switching behavior in compact SMT packages.

FAQ

What is the maximum allowable collector-emitter voltage for DDTA123EKA-7-F?

The absolute maximum V_CEO rating is −50 V at T_A = 25 °C. Operation beyond this voltage risks avalanche breakdown and permanent damage. Derating is required above 25 °C ambient per the 625 °C/W R_θJA value and the derating curve in Figure 1 of DS30341 Rev. 8-2.

Can DDTA123EKA-7-F be used as a linear amplifier?

No - it is optimized for saturated switching, not linear operation. Its guaranteed h_FE spec applies only at V_CE = −5 V and I_C = −20 mA in switching conditions. The device lacks linearity specs (e.g., distortion, frequency response in active region), and its internal resistor network limits bias point adjustability.

What does the "KA" suffix indicate in DDTA123EKA-7-F?

The "KA" suffix denotes the SC-59 package variant with green molding compound and lead-free matte tin plating, compliant with RoHS Directive 2011/65/EU and Diodes Inc.'s environmental policy. It replaces earlier "K" versions that used halogenated flame retardants prior to date code 0627.

Is tape-and-reel packaging available for this part?

Yes - DDTA123EKA-7-F ships in 3000-unit tape-and-reel format per ordering information on page 3 of DS30341 Rev. 8-2. The "-7-F" suffix explicitly indicates this packaging option, compatible with standard SMT pick-and-place equipment using EIA-481-D compliant carrier tape.