Diodes Incorporated DDA124EH-7

Overview

DDA124EH-7 from Diodes Incorporated is a PNP pre-biased dual small-signal transistor in SOT563 package, featuring integrated 22 kΩ and 22 kΩ bias resistors (R1 = R2 = 22 kΩ), −50 V V_CBO/V_CEO, −30 mA output current rating, and AEC-Q101 qualification for automotive reliability. It operates as a logic-level interface switch in low-power digital control circuits.

For engineers reviewing the DDA124EH-7 datasheet, DDA124EH-7 pinout, DDA124EH-7 application, or DDA124EH-7 equivalent, this part serves as a compact, RoHS-compliant dual-PNP switch with defined input threshold (V_L(OFF) = −0.5 V, V_L(ON) = −1.9 V at I_O = −5 mA) and guaranteed DC current gain (h_FE = 100–600) for deterministic saturation in 3.3 V/5 V logic-driven loads.

Technical Context

This device integrates two identical PNP transistors with monolithic bias networks-each channel includes two 22 kΩ resistors connected between base and emitter (R1) and base and collector (R2)-enabling direct connection to CMOS/TTL outputs without external biasing. Its −50 V breakdown rating and −30 mA continuous output support robust operation in 12 V automotive signal conditioning paths.

The SOT563 package provides six terminals with dual-channel symmetry: pins 1–3 form one transistor (C/B/E), pins 4–6 the second (C/B/E), sharing no internal connections. Thermal resistance of 833 °C/W (R_θJA) reflects its suitability for low-power surface-mount applications with minimal copper area.

Key Specifications

Pinout & Package

SOT563 is a 6-pin, dual-transistor surface-mount package with 0.65 mm pitch, 1.60 mm × 1.20 mm footprint, and 0.20 mm nominal height. Molded plastic case meets UL 94V-0 flammability rating; matte tin-plated terminals ensure solderability per MIL-STD-202.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDA144EH-7 and DDA114EH-7, DDA124EH-7 strikes a balance: its 22 kΩ bias network delivers moderate input current (0.36 mA), predictable −1.9 V logic threshold, and −30 mA output capability-ideal for general-purpose automotive and industrial digital interfacing where component count and thermal performance are prioritized.

Availability

DDA124EH-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, USB-C power delivery interfaces, and smart lighting control systems requiring stable component supply and AEC-Q101 reliability assurance.

Supply support for DDA124EH-7 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 and manufacturing operations across Asia and the Americas.

The DDA series targets automotive-qualified, pre-biased transistor solutions for space- and cost-sensitive digital interface applications-designed specifically to replace discrete BJT + resistor combinations in body control, sensor signal conditioning, and power sequencing circuits.

FAQ

What is the maximum allowable continuous collector current per channel?

The DDA124EH-7 is rated for −30 mA continuous output current per channel under standard conditions (T_A = +25 °C, P_D ≤ 150 mW). Derating applies above +25 °C ambient: power dissipation decreases linearly at 0.18 mW/°C beyond that point, limiting usable current in high-temperature environments.

Can both emitter terminals be connected to different supply rails?

Yes-pins 3 and 6 are physically separate emitter terminals with no internal connection. This allows independent referencing: e.g., Channel A emitter to 12 V, Channel B emitter to 5 V, enabling mixed-voltage signal translation without level-shifter ICs.

Is the SOT563 package compatible with standard reflow profiles?

Yes-the SOT563 package is qualified for lead-free reflow per JEDEC J-STD-020, with moisture sensitivity level (MSL) 1. No floor life limitation applies, and peak reflow temperature up to 260 °C is supported using standard Pb-free profiles without delamination or solder joint defects.

Does the device support reverse-voltage protection on the input?

No-DDA124EH-7 has no intrinsic reverse-input protection. The base-emitter junction is forward-biased during normal operation; applying positive voltage to the input (relative to emitter) risks damaging the internal bias resistors or transistor junction. External clamping diodes are required for bidirectional signal lines.