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Diodes Incorporated ADTC143ZUAQ-7
- Part No.:
- ADTC143ZUAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADTC143ZUAQ-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
ADTC143ZUAQ-7 from Diodes Incorporated is an AEC-Q101-qualified NPN pre-biased small-signal transistor in SOT323 package, featuring integrated 4.7 kΩ and 47 kΩ bias resistors, 50 V VCC, 100 mA IC(max), and 250 MHz fT, designed for automotive logic-level switching and signal conditioning in space-constrained PCBs.
For engineers reviewing the ADTC143ZUAQ-7 datasheet, ADTC143ZUAQ-7 pinout, ADTC143ZUAQ-7 application, or ADTC143ZUAQ-7 equivalent, key selection criteria include guaranteed ON/OFF thresholds (VIN(ON) ≤ 1.3 V, VIN(OFF) ≥ 0.5 V), low VCE(SAT) (0.1–0.3 V at 5 mA), DC current gain ≥80, and automotive-grade reliability with PPAP capability.
Technical Context
This device integrates two precision bias resistors (R1 = 4.7 kΩ, R2 = 47 kΩ) directly into an NPN epitaxial planar transistor die, eliminating external base-resistor networks. It operates as a single-stage digital switch with defined input voltage thresholds and fixed current gain behavior under 5–30 V drive conditions.
The SOT323 package supports automated assembly and delivers 330 mW power dissipation on FR-4 boards with RθJA = 375 °C/W. Its thermal derating curve ensures stable operation from –55 °C to +150 °C, meeting automotive ambient requirements without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50 V - Supports rail voltages up to automotive 48 V systems with margin |
| IC(max) | 100 mA - Sufficient for driving LEDs, relays, or logic inputs in control modules |
| VIN(ON) | ≤1.3 V - Ensures reliable turn-on with 1.8 V/3.3 V microcontroller GPIO outputs |
| VCE(SAT) | 0.1–0.3 V @ 5 mA - Minimizes conduction loss and self-heating in high-duty-cycle switching |
| fT | 250 MHz - Enables use in low-speed digital signal buffering and pulse shaping |
| R1/R2 Tolerance | ±30 % / ±20 % ratio - Maintains consistent biasing across temperature and process variation |
| PD | 330 mW - Allows continuous operation at 100 mA with <1.5 V drop on standard PCB layout |
Pinout & Package
SOT323 surface-mount package: 3-pin, ultra-small outline (2.2 × 1.35 × 0.95 mm), matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference node for bias network | Connected internally to R2; forms common return path for base current and output load |
| 2 (Base) | Internal connection point between R1 and R2 | Not externally accessible; enables single-input switching without external resistor tie-off |
| 3 (Collector) | Active output terminal | Carries switched load current; rated for 50 V breakdown and 100 mA continuous conduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistors | Eliminates 2 external components and reduces PCB footprint by >40% vs discrete BJT + resistors |
| AEC-Q101 qualification | Validated for automotive powertrain, body control, and ADAS modules requiring zero defect field performance |
| Guaranteed VIN thresholds | Ensures deterministic logic-level compatibility with 1.8 V, 3.3 V, and 5 V controllers without threshold calibration |
| Green, halogen-free construction | Meets automotive OEM environmental mandates (Br+Cl <1500 ppm, Sb <1000 ppm) and RoHS 2 compliance |
Applications
| Automotive Body Control Module | Industrial PLC Input Stage |
|---|---|
Use Scenario: Switching 12 V indicator LEDs and solenoid drivers in door module PCBs. IC Role / Device Role / Timing Role: Pre-biased NPN switch providing level-shifted, current-limited drive from MCU GPIO. Use Value: Reduces component count by two resistors per channel and guarantees turn-on at 3.3 V logic while surviving load dump transients. | Use Scenario: Converting 24 V industrial sensor signals to 3.3 V microcontroller-compatible levels. IC Role / Device Role / Timing Role: Digital interface translator with built-in pull-down and noise immunity via resistor ratio. Use Value: Eliminates external voltage divider and ESD protection diodes due to guaranteed VIN(OFF) ≤ 0.5 V and 50 V VCC rating. |
| Consumer Appliance Motor Driver | Medical Diagnostic Equipment Fan Control |
Use Scenario: Driving small brushed DC motors in smart HVAC actuators. IC Role / Device Role / Timing Role: Low-side switch enabling PWM-controlled motor speed with minimal gate drive overhead. Use Value: Delivers 100 mA continuous current with <0.3 V saturation drop, reducing heat generation and enabling compact thermal design. | Use Scenario: Controlling cooling fans in portable ultrasound units requiring silent, reliable operation. IC Role / Device Role / Timing Role: Fail-safe enable switch that remains OFF during power-up until MCU asserts valid logic. Use Value: Guaranteed VIN(OFF) ≥ 0.5 V prevents fan spin-up during brown-out or reset conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar pre-biased NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSV143ZMXV6T1G | Same SOT-323 package, identical R1/R2 values, but rated only to 30 V VCC and not AEC-Q101 qualified | Limited to consumer/industrial use; unsuitable for 48 V automotive systems or PPAP-managed production | Select when cost is prioritized over automotive qualification and voltage headroom is sufficient |
| DTC143ZCA-7-F | Same electrical specs and AEC-Q101 rating, but uses SOT-23 package (larger footprint, higher RθJA = 400 °C/W) | Requires more PCB area and offers lower thermal performance; less suitable for dense automotive modules | Select when legacy SOT-23 tooling exists and thermal margin exceeds 330 mW requirement |
Compared with NSV143ZMXV6T1G and DTC143ZCA-7-F, ADTC143ZUAQ-7 uniquely combines AEC-Q101 qualification, 50 V rating, and SOT323 miniaturization-making it optimal for next-generation automotive ECUs where board space, reliability, and system voltage scalability are jointly constrained.
Availability
ADTC143ZUAQ-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, and medical diagnostic equipment requiring stable component supply and full traceability.
Supply support for ADTC143ZUAQ-7 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, application-optimized components for automotive, industrial, and computing markets.
ADTC143ZUAQ belongs to Diodes' Automotive-Grade Pre-Biased Transistor (PBT) product line, engineered specifically to replace discrete BJT + resistor combinations in safety-critical, space-constrained automotive electronics.
FAQ
What is the maximum operating temperature for ADTC143ZUAQ-7?
The ADTC143ZUAQ-7 is rated for junction and storage temperatures from –55 °C to +150 °C. Its thermal resistance (RθJA = 375 °C/W) allows full 100 mA operation up to +85 °C ambient on standard FR-4 PCBs with minimum copper pad layout, per DS38832 Rev. 2–2.
Is ADTC143ZUAQ-7 pin-compatible with standard SOT-323 NPN transistors?
No-ADTC143ZUAQ-7 has a proprietary internal connection: Pin 1 is emitter, Pin 2 is inaccessible internal base node, and Pin 3 is collector. Unlike generic SOT-323 BJTs, it lacks an exposed base terminal and requires no external bias resistors, making it functionally distinct despite identical footprint.
Does ADTC143ZUAQ-7 support PWM switching at frequencies above 10 kHz?
Yes-its 250 MHz gain-bandwidth product and typical VCE(SAT) rise time <100 ns support clean PWM switching up to at least 100 kHz. However, switching losses increase above 50 kHz due to limited fT-driven charge storage; recommended for duty-cycle control rather than high-frequency SMPS.
Can ADTC143ZUAQ-7 be used in reverse-biased configurations (e.g., as a PNP emulator)?
No-the internal resistor network is unidirectional: R1 connects collector to base, R2 connects base to emitter. Reverse biasing (e.g., applying voltage to emitter) violates absolute maximum ratings and risks latch-up or permanent damage, as confirmed by the VIN specification (–5 V to +30 V referenced to emitter).
ADTC143ZUAQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 250µA, 5mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 330 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
ADTC143ZUAQ-7 FAQ
1.How can I place an order for ADTC143ZUAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADTC143ZUAQ-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 ADTC143ZUAQ-7 reliable?
The price and inventory of ADTC143ZUAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADTC143ZUAQ-7 is usually 5 days.
3.What payment methods are accepted for ADTC143ZUAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADTC143ZUAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADTC143ZUAQ-7?
ADTC143ZUAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADTC143ZUAQ-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 ADTC143ZUAQ-7?
For technical support, including ADTC143ZUAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADTC143ZUAQ-7 requirements.
6.How does Aetrix verify that ADTC143ZUAQ-7 is sourced from the original manufacturer or authorized distributors?
All ADTC143ZUAQ-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 ADTC143ZUAQ-7 meets industry standards.
7.What is the process for return or replacement of ADTC143ZUAQ-7?
All ADTC143ZUAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with ADTC143ZUAQ-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 ADTC143ZUAQ-7 part is unused and in its original packaging.
Return procedure for ADTC143ZUAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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