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Diodes Incorporated ADTA143ECAQ-7
- Part No.:
- ADTA143ECAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADTA143ECAQ-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,804
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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, and -50V VCC rating. It functions as a logic-controlled high-side switch in low-power automotive signal conditioning circuits.
For engineers reviewing the ADTA143ECAQ datasheet, ADTA143ECAQ pinout, ADTA143ECAQ application, or ADTA143ECAQ equivalent, key selection criteria include guaranteed turn-on/off thresholds (-3V/-0.5V), DC current gain ≥20 at -10mA, thermal resistance of 403°C/W on FR-4, and AEC-Q101 compliance for under-hood control modules.
Technical Context
This device integrates matched base-emitter bias resistors to eliminate external components in digital switching applications. Its PNP topology enables high-side load control with TTL/CMOS-compatible input voltage thresholds and guaranteed saturation at -20mA output current.
The transistor operates across -55°C to +150°C, supports transient pulse power up to 0.35W on minimum-copper FR-4, and delivers 250MHz gain-bandwidth product-sufficient for low-speed digital interface buffering and LED driver enable control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | -50V - Supports reverse-battery protection and 48V automotive system compatibility |
| IC Max | -100mA - Drives small solenoids, LEDs, or logic-level shifters without external amplification |
| VIN(on) | -3V max - Ensures reliable turn-on with standard 3.3V/5V microcontroller GPIO |
| VIN(off) | -0.5V min - Prevents false triggering from noise or floating inputs |
| PD | 310mW - Enables continuous operation at ambient ≤85°C on standard PCB layout |
| RθJA | 403°C/W - Requires no heatsink for typical automotive cabin or ECU module mounting |
| GI Min | 20 - Provides stable switching with <5% variation over temperature and process |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 0.915mm nominal body height, 2.40mm length, and matte tin-plated leads compliant with MIL-STD-202 Method 208 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference node | Connected to positive supply rail in high-side switch configuration |
| 2 (Base) | Bias resistor junction | Internal connection point between R1 and R2; accepts logic-level control signal |
| 3 (Collector) | Switched output node | Drives load to ground when active; supports -100mA continuous sink current |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias network | Matched 4.7kΩ R1/R2 resistors reduce BOM count and improve thermal tracking vs discrete solutions |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Green compound packaging | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets global environmental mandates |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; no intentionally added lead or hazardous substances |
Applications
| Automotive Door Module | Industrial PLC Input Stage |
|---|---|
Use Scenario: Controlling window lift motor enable signals in door control units. IC Role / Device Role / Timing Role: High-side logic-level switch isolating MCU GPIO from 12V load circuitry. Use Value: Eliminates need for external base resistors and improves ESD robustness with integrated bias network. | Use Scenario: Interfacing 24V industrial sensors to 3.3V microcontroller inputs. IC Role / Device Role / Timing Role: Level-shifting and current-limiting buffer for dry-contact or NAMUR sensor outputs. Use Value: Guaranteed -0.5V turn-off threshold prevents false triggers from common-mode noise on factory floor wiring. |
| LED Status Indicator | USB-C Port Power Switch |
Use Scenario: Driving status LEDs in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-power saturated switch enabling LED anode connection to battery rail. Use Value: -0.3V VO(on) ensures minimal voltage drop and consistent brightness across temperature range. | Use Scenario: Enabling VBUS power path in USB-C receptacle designs. IC Role / Device Role / Timing Role: High-side enable switch controlled by USB PD controller GPIO. Use Value: AEC-Q101 qualification supports automotive USB-C charging ports requiring IATF 16949 traceability. |
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 package and R1=R2=4.7kΩ, but rated only to +125°C (vs +150°C) and not AEC-Q101 qualified | Limited to commercial/industrial temperature range; unsuitable for under-hood automotive use | Select when cost sensitivity outweighs extended temperature or automotive qualification requirements |
| DXTA143ECA-7 | Identical electrical specs and AEC-Q101 qualification, but uses SOT323 package (smaller footprint, higher thermal resistance) | Higher RθJA (470°C/W) limits power handling on same PCB area | Select only if board space constraints justify reduced thermal performance and higher assembly cost |
Compared with NSV143EWT1G and DXTA143ECA-7, ADTA143ECAQ uniquely combines full automotive qualification, extended temperature range, and optimized thermal performance in the industry-standard SOT23 footprint-making it the preferred choice for production-grade automotive electronics where reliability and manufacturability are critical.
Availability
ADTA143ECAQ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, LED driver circuits, and USB-C power path management requiring stable component supply and long-term lifecycle support.
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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to Diodes' Automotive-Grade Pre-Biased Transistor (PBT) product line, engineered specifically for simplified, reliable, and AEC-Q101-compliant switching in harsh-environment automotive subsystems.
FAQ
What is the guaranteed input voltage range for reliable switching?
The ADTA143ECAQ guarantees turn-on when input voltage is ≤ -3V and turn-off when input voltage is ≥ -0.5V, measured at VCC = -5V and specified load conditions. This provides 2.5V noise margin for robust operation in electrically noisy automotive environments, eliminating need for external Schmitt-trigger circuitry.
Can this transistor replace a discrete BJT + two resistors in existing designs?
Yes-ADTA143ECAQ directly replaces a PNP BJT with two external 4.7kΩ base resistors. Pinout matches standard SOT23 PNP transistors (Emitter-Base-Collector), and internal resistor matching ensures consistent biasing across temperature and process variations, reducing design validation effort.
Is thermal derating required for operation above 25°C ambient?
Yes-power dissipation must be linearly derated above 25°C at 0.77mW/°C (based on RθJA = 403°C/W). At 85°C ambient, maximum allowable power drops to ~265mW. The datasheet provides derating curves for minimum-copper FR-4 boards to guide safe operating area calculations.
Does the AEC-Q101 qualification cover PPAP submission support?
Yes-Diodes certifies ADTA143ECAQ as PPAP-capable, with full documentation including test reports, process flow diagrams, and control plans available upon request. Manufacturing occurs in IATF 16949-certified facilities, ensuring traceability and statistical process control for automotive production releases.
ADTA143ECAQ-7 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-7 FAQ
1.How can I place an order for ADTA143ECAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADTA143ECAQ-7 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-7 reliable?
The price and inventory of ADTA143ECAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADTA143ECAQ-7 is usually 5 days.
3.What payment methods are accepted for ADTA143ECAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADTA143ECAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADTA143ECAQ-7?
ADTA143ECAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADTA143ECAQ-7 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-7?
For technical support, including ADTA143ECAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADTA143ECAQ-7 requirements.
6.How does Aetrix verify that ADTA143ECAQ-7 is sourced from the original manufacturer or authorized distributors?
All ADTA143ECAQ-7 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-7 meets industry standards.
7.What is the process for return or replacement of ADTA143ECAQ-7?
All ADTA143ECAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with ADTA143ECAQ-7, 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-7 part is unused and in its original packaging.
Return procedure for ADTA143ECAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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