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Diodes Incorporated DDTA143EUA-7
- Part No.:
- DDTA143EUA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTA143EUA-7.pdf
- Description:
- TRANS PREBIAS PNP 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,037
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Product details
Overview
DDTA143EUA-7 from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT-323 package, featuring integrated bias resistors R1 = R2 = 4.7 kΩ, −30 V input voltage rating, −100 mA output current capability, and DC current gain (GI) of −20 at −5 VCE, −10 mAC. It functions as a logic-level switch in low-power digital interface circuits.
For engineers reviewing the DDTA143EUA-7 datasheet, DDTA143EUA-7 pinout, DDTA143EUA-7 application, or DDTA143EUA-7 equivalent, key selection criteria include verified input voltage thresholds (VIN(on) = −1.9 V typ), guaranteed saturation voltage (VCE(SAT) ≤ −0.3 V), thermal resistance (RθJA = 625 °C/W), and RoHS-compliant SOT-323 packaging for space-constrained PCB layouts.
Technical Context
This device integrates two matched 4.7 kΩ bias resistors (R1 = R2) to enable single-resistor logic-level drive, eliminating external base resistors. Its PNP configuration supports active-low switching with grounded emitter and collector-connected load.
The transistor uses epitaxial planar die construction for stable gain and low leakage (IO(off) ≤ 0.5 μA at VCC = −50 V), and operates across −55 °C to +150 °C with 200 mW power dissipation on FR4 board per AP02001 pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN(on) | −1.9 V typical; ensures reliable turn-on with standard −3.3 V or −5 V logic signals |
| VCE(SAT) | ≤ −0.3 V at IC = −20 mA, IB = −0.5 mA; minimizes conduction loss in switching applications |
| GI | −20 minimum at VCE = −5 V, IC = −10 mA; provides predictable current amplification for digital buffer stages |
| R1 / R2 | 4.7 kΩ ±30%; enables resistor-free interface with microcontroller GPIOs driving active-low loads |
| PD | 200 mW maximum; supports continuous operation in ambient up to +85 °C with standard PCB copper area |
| fT | 250 MHz typical; sufficient for low-speed digital signal routing (<10 MHz edge rates) |
Pinout & Package
SOT-323 surface-mount plastic package (2.20 mm × 1.35 mm × 0.90 mm), lead-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | GND (+) | Common reference node; connected to system ground when used as low-side switch |
| 2 (Base) | Input | Driven by logic signal; internal R1/R2 network sets bias current without external components |
| 3 (Collector) | Output | Switched high-side node; connects to load supply rail (e.g., −3.3 V or −5 V) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 4.7 kΩ matched resistors eliminate need for external base resistor in digital switching |
| Epitaxial planar die construction | Ensures consistent GI and low leakage across temperature and production lots |
| RoHS-compliant & "Green" molding compound | Halogen-free, UL 94V-0 rated package suitable for automotive and industrial compliance requirements |
| Low VCE(SAT) at rated current | −0.3 V max enables efficient power delivery in battery-powered sensor interface circuits |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Driving discrete LED indicators or relay coils from 3.3 V MCU GPIO pins in harsh-temperature environments. IC Role / Device Role / Timing Role: PNP pre-biased switch providing inverted logic-level control with minimal BOM count. Use Value: Eliminates two external resistors per channel, reducing PCB area and assembly cost while maintaining −100 mA sink capability. | Use Scenario: Level-shifting and enabling 5 V analog sensor outputs to 3.3 V ADC inputs in door module ECUs. IC Role / Device Role / Timing Role: Active-low signal conditioner isolating higher-voltage domains from low-voltage logic. Use Value: −30 V input rating and −55 °C to +150 °C operation ensure reliability under automotive load-dump and cold-crank conditions. |
| Consumer IoT Power Sequencing | Medical Wearable Status Indicator |
Use Scenario: Controlling power-up sequence of BLE SoC peripherals using MCU-controlled enable lines. IC Role / Device Role / Timing Role: Low-leakage (≤0.5 μA) enable switch ensuring zero-current standby state. Use Value: 200 mW power rating and 625 °C/W thermal resistance allow use in compact, unventilated enclosures without derating. | Use Scenario: Driving red/green status LEDs in battery-operated pulse oximeters with strict size constraints. IC Role / Device Role / Timing Role: Space-optimized logic-level driver in SOT-323 footprint replacing discrete transistor + resistor pair. Use Value: 0.006 g weight and 2.2 mm × 1.35 mm outline meet wearable form factor and drop-test mechanical requirements. |
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 |
|---|---|---|---|
| DDTA143ZU-7 | SOT-523 package (1.6 mm × 1.6 mm); same R1=R2=4.7 kΩ, but 150 mW PD | Higher density placement required; lower power handling limits continuous 100 mA use | Select when board area is critical and peak current < 50 mA |
| NSVD143EWT1G | Onsemi part; R1=R2=4.7 kΩ, but VIN(on) = −1.4 V min (weaker turn-on drive) | May require stronger logic drive or additional margin in low-VCC systems | Select only if cross-qualified for existing Onsemi design reuse |
Compared with DDTA143ZU-7 and NSVD143EWT1G, DDTA143EUA-7 offers superior thermal performance (200 mW vs. 150 mW) and tighter VIN(on) specification (−1.9 V typ), making it preferred for robust industrial switching where ambient temperature exceeds 70 °C.
Availability
DDTA143EUA-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and consumer IoT power sequencing requiring stable component supply and long-term manufacturability.
Supply support for DDTA143EUA-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, industry-qualified components for automotive, industrial, and computing markets.
The DDTA series targets cost-sensitive, space-constrained digital interface applications where integration of bias resistors reduces bill-of-materials and improves manufacturing yield.
FAQ
What is the maximum continuous collector current for DDTA143EUA-7?
The absolute maximum continuous collector current is −100 mA at TA = 25 °C, derated linearly above 25 °C per the 625 °C/W thermal resistance. At 85 °C ambient, maximum safe continuous current drops to approximately −64 mA based on 200 mW power limit and VCE(SAT) behavior.
Can DDTA143EUA-7 replace a standard PNP transistor like BC807-16?
No - DDTA143EUA-7 is not a direct replacement for BC807-16 because it includes integrated 4.7 kΩ base-emitter and base-collector resistors. Using it without adjusting external circuitry will cause incorrect biasing; it replaces a BC807-16 plus two discrete resistors in logic-driven switch configurations.
Is the SOT-323 package of DDTA143EUA-7 compatible with reflow soldering per J-STD-020?
Yes - the device is qualified for lead-free reflow per J-STD-020C with Moisture Sensitivity Level 1, meaning it can be stored indefinitely at ≤30 °C/60% RH and subjected to standard Pb-free reflow profiles (peak 260 °C) without baking or special handling.
What does the "UA" suffix indicate in DDTA143EUA-7?
The "UA" suffix denotes the SOT-323 package variant with standard marking and RoHS-compliant matte tin plating over Alloy 42 leadframe. It distinguishes this version from other packages such as "U" (SOT-323, non-RoHS) or "ZU" (SOT-523), and confirms compliance with Diodes Incorporated's Green Policy (halogen-free, Sb2O3-free).
DDTA143EUA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- PNP - 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:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTA143EUA-7 FAQ
1.How can I place an order for DDTA143EUA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA143EUA-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 DDTA143EUA-7 reliable?
The price and inventory of DDTA143EUA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA143EUA-7 is usually 5 days.
3.What payment methods are accepted for DDTA143EUA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA143EUA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA143EUA-7?
DDTA143EUA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA143EUA-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 DDTA143EUA-7?
For technical support, including DDTA143EUA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA143EUA-7 requirements.
6.How does Aetrix verify that DDTA143EUA-7 is sourced from the original manufacturer or authorized distributors?
All DDTA143EUA-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 DDTA143EUA-7 meets industry standards.
7.What is the process for return or replacement of DDTA143EUA-7?
All DDTA143EUA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA143EUA-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 DDTA143EUA-7 part is unused and in its original packaging.
Return procedure for DDTA143EUA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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