Diodes Incorporated ADTA124ECAQ-7

Overview

ADTA124ECAQ from Diodes Incorporated is a PNP pre-biased transistor in SOT23 package, featuring integrated bias resistors (R1 = R2 = 22 kΩ), AEC-Q101 qualification for automotive use, and −100 mA maximum collector current. It operates with V_CC up to −50 V, V_IN range of +10 V to −40 V, and delivers DC current gain (G_I) ≥56 at −5 V V_CE and −5 mA I_O. It is used in automotive body control modules for discrete load switching.

For engineers reviewing the ADTA124ECAQ datasheet, ADTA124ECAQ pinout, ADTA124ECAQ application, or ADTA124ECAQ equivalent, this page provides verified electrical parameters, SOT23 terminal mapping, automotive-grade reliability context, thermal derating curves, and functionally comparable alternatives with documented differences in bias resistor tolerance and gain-bandwidth performance.

Technical Context

This device integrates two matched 22 kΩ bias resistors (R1 = R2) to enable direct logic-level drive without external components. Its PNP configuration supports high-side switching in 12 V automotive systems, with guaranteed turn-on at V_IN ≤ −3 V and turn-off at V_IN ≥ −0.5 V under specified conditions.

The transistor exhibits f_T = 250 MHz (V_CE = −10 V, I_E = −5 mA), supporting fast digital switching in CAN/LIN node interface circuits. Its −55 °C to +150 °C operating range and IATF 16949 manufacturing ensure robustness in engine bay and under-hood environments.

Key Specifications

Pinout & Package

Package: SOT23 - Molded plastic, green compound (UL 94V-0), matte tin-plated leads, 0.008 g weight, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSV12201T1G and DXT3904P-7, ADTA124ECAQ uniquely combines matched 22 kΩ bias resistors, AEC-Q101 qualification, and 250 MHz f_T, making it the only option qualified for production automotive high-side switching where input noise immunity, thermal stability, and supply chain traceability are mandatory.

Availability

ADTA124ECAQ is available at Aetrix Electronics and suitable for automotive body control modules, LED lighting drivers, industrial sensor interfaces, and LIN bus subsystems requiring stable component supply and long-term lifecycle support.

Supply support for ADTA124ECAQ 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and test facilities certified to IATF 16949 and ISO 9001 standards.

ADTA124ECAQ belongs to Diodes' AEC-Q101-qualified pre-biased transistor product line, engineered specifically for automotive signal switching, load control, and interface consolidation in harsh-environment electronic control units.

FAQ

What is the guaranteed input voltage range for reliable turn-on and turn-off?

The ADTA124ECAQ guarantees turn-on when input voltage is ≤ −3 V (V_I(on)) and turn-off when input voltage is ≥ −0.5 V (V_I(off)), tested at V_CC = −5 V and specified output currents. This 2.5 V hysteresis margin prevents chatter in noisy automotive environments and eliminates need for external Schmitt-trigger circuitry.

Does ADTA124ECAQ require external bias resistors?

No. The device integrates two 22 kΩ bias resistors (R1 = R2) internally, forming a voltage divider that sets base current automatically. This eliminates two external components per channel, reduces PCB footprint, and improves manufacturing yield in high-volume automotive assembly.

How does its thermal performance compare to standard SOT23 transistors?

With R_θJA = 403 °C/W on minimum copper FR-4, ADTA124ECAQ matches typical SOT23 discrete PNP thermal performance. Its 310 mW power dissipation rating is validated using Diodes' recommended pad layout, and derating begins linearly above +25 °C ambient-no special thermal vias or copper pours are required for ≤100 mA DC loads.

Is ADTA124ECAQ compatible with lead-free reflow profiles?

Yes. The device uses matte tin-plated leads and green molding compound rated for JEDEC J-STD-020 moisture sensitivity level 1, supporting standard lead-free reflow profiles up to 260 °C peak temperature. Its UL 94V-0 flammability rating and halogen-free composition meet IPC-J-STD-020D and automotive OEM material requirements.