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Diodes Incorporated DDTC143ZUA-7-F
- Part No.:
- DDTC143ZUA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTC143ZUA-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:50,237
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Product details
Overview
DDTC143ZUA-7-F from Diodes Incorporated is a 50V NPN pre-biased transistor in SOT323 package, featuring integrated R1 = 4.7kΩ and R2 = 47kΩ bias resistors. It delivers DC current gain (hFE) of 80 at IC = 10mA, VCE = 5V, with VCE(sat) ≤ 0.3V and input current of 1.8mA at VIN = 5V. It is used for level-shifting and digital switching in compact consumer and industrial control circuits.
For engineers reviewing the DDTC143ZUA-7-F datasheet, DDTC143ZUA-7-F pinout, DDTC143ZUA-7-F application, or DDTC143ZUA-7-F equivalent, key selection criteria include verified R1/R2 resistor tolerance (±30% R1, ±20% R2/R1 ratio), guaranteed IOUT(off) ≤ 0.5μA at VCC = 50V, and thermal resistance RθJA = 625°C/W on FR4 board - critical for low-power logic interface reliability.
Technical Context
This device integrates an NPN transistor with two discrete biasing resistors (R1 = 4.7kΩ, R2 = 47kΩ) in a single SOT323 package, eliminating external base-resistor routing. Its input voltage threshold VIN(on) is 1.3V at IOUT = 5mA, enabling direct interfacing with 1.8V/3.3V logic families.
The transistor operates with VCC up to 50V and supports continuous output current up to 100mA. Its fT = 250MHz ensures adequate bandwidth for high-speed digital switching, while VOUT(on) ≤ 0.3V at IOUT/IIN = 5mA/0.25mA confirms robust saturation under defined drive conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50V - supports rail-to-rail operation in 24V industrial IO and 36V automotive subsystems |
| R1 / R2 | 4.7kΩ / 47kΩ - sets fixed base bias ratio for predictable turn-on at low input voltage |
| hFE | 80 min at IC = 10mA - ensures stable current amplification without external gain-setting components |
| VCE(sat) | ≤0.3V at IC = 5mA - minimizes power loss and self-heating in always-on load-switching applications |
| PD | 200mW - defines maximum dissipation on standard FR4 PCB with recommended pad layout |
| IOUT(off) | ≤0.5μA at VCC = 50V - guarantees high off-state impedance for leakage-sensitive battery-backed circuits |
| fT | 250MHz - enables reliable switching at >10MHz clock rates in timing-critical logic buffers |
Pinout & Package
Package: SOT323 - ultra-compact 3-pin surface-mount plastic package (2.15mm × 2.10mm × 0.95mm), moisture sensitivity level 1, matte tin-plated leads, RoHS/Green compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Transistor emitter terminal | Reference node for current sink operation; tied to ground or low-side return path |
| 2 (Base) | Input node connected to R1–R2 junction | Accepts logic-level input; internal resistive divider sets bias point independent of external pull-up |
| 3 (Collector) | Transistor collector terminal | Drives load to VCC; supports up to 100mA continuous current with <0.3V saturation drop |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1/R2 bias network | Eliminates 2 external resistors, reducing BOM count and PCB area in space-constrained designs |
| VIN(on) = 1.3V @ 5mA | Enables direct drive from 1.8V microcontroller GPIO without level translation |
| Gain-bandwidth product = 250MHz | Supports clean edge transitions in 10+ MHz digital signal routing and pulse-width modulation |
| Moisture Sensitivity Level 1 | Allows unlimited floor life before reflow; no baking required prior to assembly |
| Halogen- and antimony-free "Green" compound | Meets IPC-1752A environmental compliance for global electronics manufacturing |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving indicator LEDs from low-current MCU pins in portable medical devices. IC Role / Device Role / Timing Role: NPN switch providing current gain and voltage-level compatibility between 1.8V GPIO and 5V LED supply rail. Use Value: Eliminates need for discrete base resistor and reduces footprint by 2.5mm² versus discrete solution. |
Use Scenario: Extending digital outputs of an ARM Cortex-M0+ MCU in smart home sensor hubs. IC Role / Device Role / Timing Role: Logic-level translator and current buffer enabling 100mA load drive per channel. Use Value: Maintains <100ns propagation delay while supporting 3.3V/5V mixed-voltage system interconnect. |
| Industrial Pushbutton Interface | Automotive Body Control Module Input |
Use Scenario: Debouncing and conditioning mechanical pushbutton signals in factory HMIs. IC Role / Device Role / Timing Role: Schmitt-trigger-like input conditioning via built-in resistor ratio and hFE hysteresis. Use Value: Reduces ESD susceptibility and eliminates external RC filter components in Class A industrial enclosures. |
Use Scenario: Signal conditioning for door lock/unlock switch inputs in 12V vehicle body controllers. IC Role / Device Role / Timing Role: High-impedance input stage with 50V VCC rating tolerating load-dump transients. Use Value: Survives ISO 7637-2 Pulse 5a (120V/100ms) when combined with TVS diode, simplifying front-end protection. |
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 |
|---|---|---|---|
| DDTC123JUA-7-F | R1 = 2.2kΩ, R2 = 47kΩ; VIN(on) = 1.1V @ 5mA; hFE = 80 min | Lower input threshold suits 1.2V logic families but draws higher input current (3.6mA @ 5V) | Select when driving from sub-1.5V ASIC outputs where lower VIN(on) is mandatory |
| NSVD143ZWT1G | Same R1/R2 values; VCE(sat) = 0.25V max; rated to AEC-Q101 Grade 1 (−40°C to +125°C) | Qualified for automotive under-hood use; tighter VCE(sat) spec improves efficiency in thermally constrained modules | Choose for automotive production requiring PPAP documentation and extended temperature validation |
Compared with DDTC123JUA-7-F, DDTC143ZUA-7-F reduces input current by 50% at 5V drive while maintaining identical hFE and VCE(sat), improving power efficiency in battery-powered systems; versus NSVD143ZWT1G, it lacks AEC-Q101 qualification but offers cost advantage in non-automotive industrial designs.
Availability
DDTC143ZUA-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, and industrial pushbutton interfaces requiring stable component supply, consistent marking (N11), and full traceability across 3,000-unit reels.
Supply support for DDTC143ZUA-7-F 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 the DDTC R1≠R2 Series of pre-biased transistors, designed specifically to replace discrete transistor + dual-resistor configurations in space- and cost-sensitive digital interface applications.
FAQ
What is the maximum continuous collector current for DDTC143ZUA-7-F?
The absolute maximum continuous collector current is 100mA, as specified in the Absolute Maximum Ratings table. This value applies at Tamb = +25°C with proper PCB thermal relief; derating is required above +25°C per the published derating curve, reaching 0mA at +150°C ambient.
Does DDTC143ZUA-7-F require external biasing resistors?
No. It integrates R1 = 4.7kΩ and R2 = 47kΩ internally, forming a fixed voltage divider that biases the NPN transistor's base. No external resistors are needed for basic switching operation, reducing component count and layout complexity.
Is DDTC143ZUA-7-F qualified for automotive applications?
DDTC143ZUA-7-F is not AEC-Q101 qualified. While Diodes offers automotive-grade variants (e.g., NSVD143ZWT1G), this specific part is intended for industrial and commercial applications. For automotive use, consult Diodes' AEC-Q101 product list and PPAP documentation requirements.
What is the meaning of the "N11" top-side marking on DDTC143ZUA-7-F?
"N11" is the Diodes Incorporated product type and date code marking. "N" corresponds to year 2024 per their coding scheme (K=2023, L=2024, M=2025), and "11" identifies the specific device variant within the DDTC R1≠R2 series, ensuring traceability to DS30322 Rev. 11-2 revision.
DDTC143ZUA-7-F 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:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTC143ZUA-7-F FAQ
1.How can I place an order for DDTC143ZUA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC143ZUA-7-F 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 DDTC143ZUA-7-F reliable?
The price and inventory of DDTC143ZUA-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC143ZUA-7-F is usually 5 days.
3.What payment methods are accepted for DDTC143ZUA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC143ZUA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC143ZUA-7-F?
DDTC143ZUA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC143ZUA-7-F 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 DDTC143ZUA-7-F?
For technical support, including DDTC143ZUA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC143ZUA-7-F requirements.
6.How does Aetrix verify that DDTC143ZUA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC143ZUA-7-F 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 DDTC143ZUA-7-F meets industry standards.
7.What is the process for return or replacement of DDTC143ZUA-7-F?
All DDTC143ZUA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC143ZUA-7-F, 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 DDTC143ZUA-7-F part is unused and in its original packaging.
Return procedure for DDTC143ZUA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC143ZUA-7-F Tags
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