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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single, Pre-Biased Bipolar Transistors

Diodes Incorporated ADTA144EUAQ-13

Name: ADTA144EUAQ-13
Brand: Diodes Incorporated
SKU: ADTA144EUAQ-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADTA144EUAQ-13

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: ADTA144EUAQ-13.pdf

Description:: TRANS PREBIAS PNP 50V SOT323

Quantity:: RFQ Add To RFQ list

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Inventory:6,204

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Product details

Overview

ADTA144EUAQ from Diodes Incorporated is a PNP pre-biased transistor in SOT323 package, designed for automotive signal switching with built-in 47kΩ base-emitter and base-collector bias resistors. It delivers -100mA max collector current, -50V V_CC, and operates across -55°C to +150°C, supporting AEC-Q101-compliant engine control modules.

For engineers reviewing the ADTA144EUAQ datasheet, ADTA144EUAQ pinout, ADTA144EUAQ application, or ADTA144EUAQ equivalent, key selection criteria include guaranteed turn-on at V_IN ≤ -3.0V, VO(on) ≤ -0.3V at -10mA load, R_θJA = 375°C/W on FR4, and automotive-grade traceability under IATF 16949.

Technical Context

This device integrates two precision-matched 47kΩ biasing resistors (±30% tolerance) to eliminate external components in digital logic interface circuits. Its PNP configuration enables active-low switching with defined V_I(OFF) (-0.5V) and V_I(ON) (-3.0V) thresholds, ensuring robust noise immunity in 5V/3.3V automotive microcontroller GPIO drive applications.

The transistor supports DC current gain (h_FE) ≥ 68 at -5mA collector current and exhibits f_T = 250MHz, enabling stable operation in moderate-speed signal routing-such as wake-up detection, LED dimming control, and sensor pull-up management-without oscillation risk.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Max	-50V: Supports rail-to-rail negative supply operation in automotive battery-sensed circuits
I_C Max	-100mA: Drives medium-current loads like relays, LEDs, or small solenoids directly
V_O(ON)	-0.1 to -0.3V @ -10mA: Ensures low saturation voltage for minimal power loss in switching mode
R₁/R₂	47kΩ each ±30%: Enables single-resistor-free design for consistent biasing without layout dependency
Operating Temp	-55°C to +150°C: Qualified for under-hood engine control unit (ECU) mounting locations
P_D	330mW on FR4: Defines maximum continuous dissipation with standard PCB thermal relief
f_T	250MHz: Validates suitability for <10MHz digital switching with margin against parasitic resonance

Pinout & Package

Package: SOT323 - ultra-compact surface-mount plastic case (2.15mm × 2.10mm × 0.95mm), matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current Sink Terminal	Connected to system ground or low-side return path; carries full load current
2 (Base)	Bias Input Node	Internally tied to both 47kΩ resistors; accepts TTL/CMOS-compatible logic-level input
3 (Collector)	Switched Output Terminal	Connects to load high-side (e.g., +5V rail); provides active-low output inversion

Key Features

Feature	Design Value
AEC-Q101 Qualified	Validated for automotive use with PPAP capability and IATF 16949 manufacturing
Integrated Bias Resistors	Eliminates two external 47kΩ resistors, reducing BOM count and PCB area by ~1.2mm²
Green Construction	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb), fully RoHS 3 compliant
Thermal Robustness	R_θJA = 375°C/W enables operation up to +125°C ambient without derating on standard FR4

Applications

Engine Control Unit (ECU) Wake-Up Detection

Automotive LED Dimming Interface

Use Scenario: Detecting ignition key insertion or CAN bus activity to wake ECU from sleep mode.

IC Role / Device Role / Timing Role: PNP pre-biased switch converting microcontroller GPIO low-state into grounded wake signal.

Use Value: Guaranteed V_I(ON) ≤ -3.0V ensures reliable activation despite battery voltage sag to 9V.

Use Scenario: Controlling brightness of interior dome lights via PWM-driven current sink.

IC Role / Device Role / Timing Role: Constant-current sink stage modulated by MCU PWM output.

Use Value: VO(on) ≤ -0.3V at -10mA minimizes heat generation during 100% duty cycle operation.

Body Control Module (BCM) Sensor Pull-Up

Transmission Control Unit (TCU) Fault Indicator Driver

Use Scenario: Providing configurable pull-up for analog sensor inputs (e.g., temperature, pressure).

IC Role / Device Role / Timing Role: Digitally enabled pull-up resistor replacement with fast enable/disable response.

Use Value: R₁/R₂ matching ±20% ensures predictable voltage divider behavior across temperature.

Use Scenario: Driving red warning LED on instrument cluster during transmission fault condition.

IC Role / Device Role / Timing Role: High-reliability current sink for safety-critical visual alert signaling.

Use Value: -55°C to +150°C operating range guarantees function during cold cranking and hot soak conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
NSV144EUAZT1G	Same SOT323 package, identical R1/R2 = 47kΩ, but rated only to +125°C TJ	Lacks AEC-Q101 qualification and IATF 16949 traceability	Select only for non-automotive industrial use where extended temperature is not required
DXTA144ECA-7	SOT23 package, same electrical specs, higher R_θJA = 400°C/W due to smaller thermal pad area	Lower power handling margin on FR4; requires tighter thermal layout	Choose when legacy SOT23 footprint compatibility is mandatory over thermal performance

Compared with NSV144EUAZT1G and DXTA144ECA-7, ADTA144EUAQ uniquely combines AEC-Q101 qualification, +150°C operation, and optimized SOT323 thermal resistance-making it the sole choice for under-hood automotive switching where reliability and temperature margin are non-negotiable.

Availability

ADTA144EUAQ is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply with full automotive traceability and long-term lifecycle support.

Supply support for ADTA144EUAQ 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 components for automotive, industrial, and computing markets.

The ADTA144EUAQ belongs to Diodes' Automotive-Grade Pre-Biased Transistor product line, engineered specifically to replace discrete resistor-transistor combinations in AEC-Q101-compliant vehicle subsystems.

FAQ

What is the guaranteed turn-on voltage threshold for ADTA144EUAQ?

The ADTA144EUAQ guarantees turn-on when input voltage (V_IN) is ≤ -3.0V at V_O = -0.3V and I_O = -2mA, per datasheet Note 7. This ensures reliable activation even with degraded 12V battery voltage down to 9V, making it suitable for automotive wake-up circuits where supply stability cannot be assumed.

Can ADTA144EUAQ replace a discrete PNP transistor plus two 47kΩ resistors?

Yes-ADTA144EUAQ integrates matched 47kΩ base-emitter and base-collector resistors with ±30% tolerance and ±20% ratio matching. It eliminates two external components while maintaining identical biasing behavior, reducing PCB area and assembly cost without compromising switching performance or thermal stability.

Is ADTA144EUAQ compatible with lead-free reflow profiles?

Yes-ADTA144EUAQ uses matte tin-plated leads and is rated for moisture sensitivity level 1 per J-STD-020. It withstands standard IPC/JEDEC J-STD-020D-compliant lead-free reflow profiles (peak 260°C), with no preconditioning required prior to assembly.

Does ADTA144EUAQ support bidirectional signal translation?

No-ADTA144EUAQ is a unidirectional PNP switch configured for active-low output only. Its internal resistor network and emitter-grounded topology prevent reverse current flow or level-shifting functionality. It must be used strictly as a controlled current sink from collector to emitter.

ADTA144EUAQ-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP - Pre-Biased

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 50 V

Resistor - Base (R1):: 47 kOhms

Resistor - Emitter Base (R2):: 47 kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

Frequency - Transition:: 250 MHz

Power - Max:: 330 mW

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

ADTA144EUAQ-13 FAQ

1.How can I place an order for ADTA144EUAQ-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADTA144EUAQ-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADTA144EUAQ-13 reliable?

The price and inventory of ADTA144EUAQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADTA144EUAQ-13 is usually 5 days.

3.What payment methods are accepted for ADTA144EUAQ-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADTA144EUAQ-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADTA144EUAQ-13?

ADTA144EUAQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADTA144EUAQ-13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADTA144EUAQ-13?

For technical support, including ADTA144EUAQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADTA144EUAQ-13 requirements.

6.How does Aetrix verify that ADTA144EUAQ-13 is sourced from the original manufacturer or authorized distributors?

All ADTA144EUAQ-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADTA144EUAQ-13 meets industry standards.

7.What is the process for return or replacement of ADTA144EUAQ-13?

All ADTA144EUAQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with ADTA144EUAQ-13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADTA144EUAQ-13 part is unused and in its original packaging.

Return procedure for ADTA144EUAQ-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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