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Diodes Incorporated ADTC143ECAQ-13
- Part No.:
- ADTC143ECAQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADTC143ECAQ-13.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,375
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Product details
Overview
ADTC143ECAQ from Diodes Incorporated is an NPN pre-biased transistor in SOT23 package, featuring integrated bias resistors (R1 = R2 = 4.7 kΩ), AEC-Q101 qualification for automotive use, 50 V VCC, 100 mA IC(max), and 0.1–0.3 V VO(on) at 10 mA/0.5 mA. It serves as a compact, reliable digital switch in automotive body control modules.
For engineers reviewing the ADTC143ECAQ datasheet, ADTC143ECAQ pinout, ADTC143ECAQ application, or ADTC143ECAQ equivalent, key selection criteria include guaranteed turn-on/off thresholds (VI(on) ≤ 3.0 V, VI(off) ≥ 0.5 V), ±30% input resistor tolerance, DC current gain ≥20, and thermal resistance of 403 °C/W on FR-4 board.
Technical Context
This device integrates two matched 4.7 kΩ bias resistors to configure a single-NPN transistor as a ready-to-use digital switch, eliminating external base resistors. Its design supports direct interfacing with 3.3 V and 5 V logic families while maintaining guaranteed switching behavior across temperature (−55 °C to +150 °C).
The AEC-Q101 qualification, IATF 16949 manufacturing, and PPAP capability confirm suitability for safety-critical automotive subsystems such as door lock actuators and LED status indicators where reliability under thermal stress and long-term operation is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50 V - Supports supply rails up to automotive battery transient levels (e.g., load dump) |
| IC(max) | 100 mA - Sufficient for driving small solenoids, LEDs, or logic-level MOSFET gates |
| VO(on) | 0.1–0.3 V @ IO/IL = 10 mA/0.5 mA - Ensures low saturation loss and minimal power dissipation |
| VI(on)/VI(off) | ≤3.0 V / ≥0.5 V - Guarantees robust logic-level compatibility with 3.3 V and 5 V microcontrollers |
| R1 = R2 | 4.7 kΩ ±30% - Enables predictable biasing without external components; ratio tolerance ±20% |
| PD | 310 mW @ TA = 25 °C on FR-4 - Defines maximum continuous power handling under standard PCB layout |
| fT | 250 MHz - Indicates usable bandwidth for moderate-speed switching (e.g., PWM up to ~10 MHz) |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated, moisture sensitivity level 1, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Input via internal R1/R2 divider | Accepts logic-level voltage; internally connected to R1 (to VIN) and R2 (to emitter) |
| 2 (Emitter) | Common reference node | Connected to ground or low-side return path; forms bias network reference |
| 3 (Collector) | Switched output terminal | Drives load between VCC and collector; sinks current when active |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity, and mechanical shock per JESD22 |
| Integrated R1 = R2 = 4.7 kΩ | Reduces BOM count and PCB area; eliminates manual resistor selection and placement error |
| Guaranteed VI(on)/VI(off) | Ensures deterministic switching across voltage and temperature without external hysteresis |
| Lead-free & Halogen-free | Complies with RoHS 3 (2015/863/EU) and automotive green standards (<900 ppm Br/Cl, <1000 ppm Sb) |
| Thermal resistance 403 °C/W | Enables stable operation up to +150 °C junction temperature with minimal copper pad area |
Applications
| Automotive Door Module | LED Status Indicator |
|---|---|
Use Scenario: Controlling window lift motor enable signal and mirror fold/unfold relay in body control unit. IC Role / Device Role / Timing Role: NPN pre-biased switch driving 12 V relay coil with 5 V MCU GPIO. Use Value: Eliminates need for discrete base resistor network; ensures clean turn-on at 5 V logic while surviving load dump transients up to 50 V. | Use Scenario: Driving multi-color status LEDs on instrument cluster PCB with tight space constraints. IC Role / Device Role / Timing Role: Low-VCE(sat) switch enabling precise current control via MCU PWM. Use Value: 0.1–0.3 V VO(on) minimizes forward voltage drop, preserving LED brightness and reducing thermal load on 0402/0603 footprints. |
| Engine Control Unit I/O Buffer | Industrial Sensor Interface |
Use Scenario: Level-shifting and isolation of diagnostic CAN transceiver enable signals in ECU sub-assemblies. IC Role / Device Role / Timing Role: Digital buffer isolating 3.3 V microcontroller outputs from 12 V sensor supply domains. Use Value: Guaranteed VI(off) ≤ 0.5 V prevents false triggering during MCU reset; AEC-Q101 ensures longevity in under-hood environments. | Use Scenario: Interfacing 24 V industrial proximity sensors to 3.3 V PLC input modules. IC Role / Device Role / Timing Role: High-side or low-side switch translating sensor open-collector output to logic-compatible signal. Use Value: 100 mA IC(max) and 50 V VCC support direct connection to 24 V lines; SOT23 footprint simplifies routing on dense I/O carrier boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSV143EWT1G | R1 = R2 = 4.7 kΩ; same SOT-23 package; fT = 250 MHz; VO(on) max = 0.3 V | No AEC-Q101 qualification; rated for commercial temp range only (−55 °C to +125 °C) | Select for cost-sensitive non-automotive designs where extended temperature and PPAP are not required. |
| DTC143ZCA-7-F | R1 = 4.7 kΩ, R2 = 10 kΩ (asymmetric); same VCC/IC; VO(on) max = 0.3 V | AEC-Q101 qualified but uses different bias ratio - alters input current and noise immunity | Choose only if circuit requires higher input impedance or specific R1/R2 mismatch for hysteresis or current limiting. |
Compared with NSV143EWT1G and DTC143ZCA-7-F, ADTC143ECAQ uniquely combines matched 4.7 kΩ bias resistors, full AEC-Q101 compliance, and −55 °C to +150 °C operation - making it the only option qualified for under-hood automotive switching where thermal stability and process traceability are mandatory.
Availability
ADTC143ECAQ is available at Aetrix Electronics and suitable for automotive body control modules, LED driver circuits, industrial sensor interfaces, and engine control unit I/O buffering requiring stable component supply and long-term lifecycle assurance.
Supply support for ADTC143ECAQ 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 the Americas.
The ADTC143ECAQ belongs to Diodes' Automotive-Grade Pre-Biased Transistor (PBT) product line, engineered specifically for simplified, high-reliability digital switching in harsh-environment automotive electronics.
FAQ
What is the pin configuration for ADTC143ECAQ?
ADTC143ECAQ uses standard SOT23 pinout: Pin 1 is Base (input via internal R1/R2), Pin 2 is Emitter (common reference), and Pin 3 is Collector (switched output). This matches JEDEC TO-236AB and is verified in Diodes' DS39185 Rev. 3-2, page 2 schematic and top view diagram.
Is ADTC143ECAQ suitable for 3.3 V logic interface?
Yes - its guaranteed VI(on) ≤ 3.0 V and VI(off) ≥ 0.5 V ensure reliable turn-on with 3.3 V CMOS outputs and turn-off during MCU reset or low-power states. Test data in DS39185 shows stable operation down to 2.5 V input at −40 °C.
Does ADTC143ECAQ require external bias resistors?
No - it integrates matched 4.7 kΩ R1 and R2 resistors internally. The device is designed as a drop-in replacement for discrete NPN + two-resistor configurations, reducing PCB area by >2 mm² and eliminating resistor matching tolerances in layout.
What is the maximum operating temperature for ADTC143ECAQ?
The ADTC143ECAQ is rated for junction temperature from −55 °C to +150 °C, validated per AEC-Q101 stress tests. At ambient 125 °C, derated power dissipation is ~120 mW (per DS39185 Fig. 1), supporting under-hood deployment without forced cooling.
ADTC143ECAQ-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
ADTC143ECAQ-13 FAQ
1.How can I place an order for ADTC143ECAQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADTC143ECAQ-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 ADTC143ECAQ-13 reliable?
The price and inventory of ADTC143ECAQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADTC143ECAQ-13 is usually 5 days.
3.What payment methods are accepted for ADTC143ECAQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADTC143ECAQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADTC143ECAQ-13?
ADTC143ECAQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADTC143ECAQ-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 ADTC143ECAQ-13?
For technical support, including ADTC143ECAQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADTC143ECAQ-13 requirements.
6.How does Aetrix verify that ADTC143ECAQ-13 is sourced from the original manufacturer or authorized distributors?
All ADTC143ECAQ-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 ADTC143ECAQ-13 meets industry standards.
7.What is the process for return or replacement of ADTC143ECAQ-13?
All ADTC143ECAQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with ADTC143ECAQ-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 ADTC143ECAQ-13 part is unused and in its original packaging.
Return procedure for ADTC143ECAQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADTC143ECAQ-13 Tags
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