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Diodes Incorporated ADTA143ECAQ-13
- Part No.:
- ADTA143ECAQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADTA143ECAQ-13.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,996
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Product details
Overview
ADTA143ECAQ from Diodes Incorporated is a PNP pre-biased transistor in SOT23 package, featuring integrated 4.7kΩ bias resistors (R1 = R2), AEC-Q101 qualification for automotive use, -100mA maximum output current, -0.3V typical VO(on) at -10mA/-0.5mA, and 250MHz gain-bandwidth product. It serves as an automotive-grade logic-level switch in low-power signal control circuits.
For engineers reviewing the ADTA143ECAQ datasheet, ADTA143ECAQ pinout, ADTA143ECAQ application, or ADTA143ECAQ equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, confirmed AEC-Q101 compliance status, and real-world switching use cases in body electronics and power management subsystems.
Technical Context
This device integrates matched 4.7kΩ base-emitter and base-collector resistors to enable single-resistor logic-level drive, eliminating external bias components. Its PNP topology supports high-side switching with negative input voltage thresholds (VI(off) ≤ -0.5V, VI(on) ≥ -3V) and guaranteed turn-on/turn-off behavior under automotive supply conditions.
Designed for IATF 16949-certified production, it delivers stable DC current gain (GI ≥ 20 at -10mA) and thermal performance (RθJA = 403°C/W on FR-4) across -55°C to +150°C operating range, supporting engine bay and cabin control modules requiring PPAP-capable discrete solutions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Transistor Type | PNP pre-biased with monolithic R1=R2=4.7kΩ resistors - enables direct microcontroller GPIO drive without external bias network |
| Max Output Current | -100mA - supports driving small relays, LEDs, or MOSFET gates in automotive body control units |
| VO(on) Max | -0.3V at IO/Il = -10mA/-0.5mA - ensures low saturation voltage for efficient power switching in 5V/3.3V logic interfaces |
| VI(on) Threshold | -3V minimum - guarantees reliable turn-on with standard CMOS/TTL-compatible negative logic signals |
| fT | 250MHz - provides sufficient bandwidth for PWM-driven loads up to ~100kHz with minimal phase lag |
| Power Dissipation | 310mW on FR-4 board - defines thermal derating limit for continuous operation in compact PCB layouts |
| AEC-Q101 Qualified | Yes - certified for automotive applications including door modules, seat controls, and lighting drivers |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, UL 94V-0 rating, 0.008g weight, and J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter connection | Connected to system ground or low-side return path; forms current sink node in high-side switch configuration |
| 2 (Base) | Input control node | Internally tied to both bias resistors; accepts logic-level input voltage to activate/deactivate transistor |
| 3 (Collector) | Output load connection | Connects to load supply rail (e.g., battery or regulated 5V); sinks current when enabled |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistors | R1 = R2 = 4.7kΩ ±30%, ratio tolerance ±20% - eliminates two external components and reduces layout area by >3mm² |
| AEC-Q101 qualification | Qualified per stress test requirements for automotive electronics - supports PPAP submission and long-term reliability in harsh environments |
| Green compound packaging | Halogen- and antimony-free molding compound (<900ppm Br, <900ppm Cl, <1000ppm Sb) - meets global environmental compliance mandates |
| Thermal performance | RθJA = 403°C/W on minimum-copper FR-4 - enables operation up to +125°C ambient without heatsinking in space-constrained modules |
Applications
| Automotive Door Module | LED Interior Lighting Control |
|---|---|
|
Use Scenario: Driving window lift motor enable lines and mirror fold/unfold relays in centralized body control unit. IC Role / Device Role / Timing Role: High-side PNP switch activated by 3.3V MCU GPIO with negative logic polarity. Use Value: Eliminates need for level-shifting circuitry while maintaining AEC-Q101 compliance and thermal stability at 85°C ambient. |
Use Scenario: Controlling 12V LED strips for dome, map, and footwell lighting with PWM dimming. IC Role / Device Role / Timing Role: Low-saturation current sink enabling precise 1–100Hz PWM duty cycle control. Use Value: VO(on) ≤ -0.3V ensures <5% power loss at 50mA load, extending LED lifetime in cabin applications. |
| Engine Bay Sensor Interface | Smart Fuse Monitoring Circuit |
|
Use Scenario: Isolating diagnostic signals from temperature/pressure sensors exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Signal-level translator between 5V sensor outputs and 3.3V microcontroller inputs. Use Value: Guaranteed VI(off) ≤ -0.5V prevents false triggering during EMI transients common in engine compartments. |
Use Scenario: Detecting open-circuit faults in 12V power distribution networks using current-sense resistor feedback. IC Role / Device Role / Timing Role: Fast-response switch enabling periodic self-test pulses to verify fuse integrity. Use Value: 250MHz fT supports sub-microsecond pulse generation for accurate fault detection timing. |
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 |
|---|---|---|---|
| NSV143EWT1G | Same SOT23-3 package, identical R1=R2=4.7kΩ, but rated only to +125°C TJ (vs. +150°C) and not AEC-Q101 qualified | Limited to industrial or consumer-grade modules lacking automotive certification requirements | Select when AEC-Q101 is not required and cost optimization is prioritized over extended temperature margin |
| DXTA143ECA-7 | Same die and bias network, but in SOT323 package (smaller footprint, higher RθJA = 450°C/W) and non-automotive grade | Suitable for space-constrained portable electronics where thermal derating allows lower continuous current | Choose for handheld devices needing identical electrical behavior in reduced board area, accepting tighter thermal limits |
Compared with NSV143EWT1G and DXTA143ECA-7, ADTA143ECAQ uniquely combines AEC-Q101 qualification, +150°C operation, and SOT23 manufacturability-making it the only option for PPAP-compliant automotive designs requiring full temperature coverage and industry-standard assembly compatibility.
Availability
ADTA143ECAQ is available at Aetrix Electronics and suitable for automotive body control units, interior lighting systems, and engine bay sensor interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADTA143ECAQ 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.
ADTA143ECAQ belongs to Diodes' AEC-Q101-qualified pre-biased transistor family, engineered specifically for automotive signal switching applications where space, thermal robustness, and qualification compliance are critical.
FAQ
What is the maximum continuous collector current for ADTA143ECAQ?
The absolute maximum rated output current is -100mA at TA = +25°C. Derating applies above 25°C ambient: power dissipation drops linearly to zero at +150°C junction temperature, governed by the 403°C/W thermal resistance on FR-4 board. Continuous operation at full current requires board-level thermal management below +85°C ambient.
Does ADTA143ECAQ require external bias resistors?
No. It integrates matched 4.7kΩ base-emitter and base-collector resistors (R1 = R2) on-die, enabling direct interface with 3.3V or 5V logic outputs. This eliminates two external components and associated layout area, simplifying design for space-constrained automotive modules.
Is ADTA143ECAQ compatible with lead-free reflow processes?
Yes. It is fully RoHS-compliant with matte tin-plated leads, rated for standard lead-free reflow profiles (peak temperature up to 260°C), and classified as J-STD-020 Level 1 moisture sensitivity-requiring no baking prior to assembly.
How does the AEC-Q101 qualification impact design validation?
AEC-Q101 qualification confirms successful completion of stress tests including HTOL, temperature cycling, and ESD (HBM ≥ 2kV), enabling direct use in automotive production without additional component-level qualification. PPAP documentation and IATF 16949 manufacturing evidence are available upon request.
ADTA143ECAQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 4.7 kOhms
- Resistor - Emitter Base (R2):
- 4.7 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 310 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADTA143ECAQ-13 FAQ
1.How can I place an order for ADTA143ECAQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADTA143ECAQ-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 ADTA143ECAQ-13 reliable?
The price and inventory of ADTA143ECAQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADTA143ECAQ-13 is usually 5 days.
3.What payment methods are accepted for ADTA143ECAQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADTA143ECAQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADTA143ECAQ-13?
ADTA143ECAQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADTA143ECAQ-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 ADTA143ECAQ-13?
For technical support, including ADTA143ECAQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADTA143ECAQ-13 requirements.
6.How does Aetrix verify that ADTA143ECAQ-13 is sourced from the original manufacturer or authorized distributors?
All ADTA143ECAQ-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 ADTA143ECAQ-13 meets industry standards.
7.What is the process for return or replacement of ADTA143ECAQ-13?
All ADTA143ECAQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with ADTA143ECAQ-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 ADTA143ECAQ-13 part is unused and in its original packaging.
Return procedure for ADTA143ECAQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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