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Diodes Incorporated DDTD143EC-7-F
- Part No.:
- DDTD143EC-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTD143EC-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,131
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Product details
Overview
DDTD143EC-7-F from Diodes Incorporated is an NPN pre-biased digital transistor in SOT23 package, featuring integrated 4.7kΩ and 4.7kΩ bias resistors, 500mA continuous collector current, 50V VCBO, and 0.3V VCE(sat) at IC = 50mA/IB = 2.5mA. It serves as a compact, surface-mount logic-level switch in automotive lighting control and industrial I/O interface circuits.
For engineers reviewing the DDTD143EC-7-F datasheet, DDTD143EC-7-F pinout, DDTD143EC-7-F application, or DDTD143EC-7-F equivalent, key selection criteria include input voltage range (–10V to +30V), guaranteed DC current gain (hFE ≥ 47 at IC = 50mA), thermal resistance (RθJA = 500°C/W), and AEC-Q101 qualification readiness for automotive-grade designs.
Technical Context
This device integrates two matched 4.7kΩ resistors to form a standard emitter-follower bias network, enabling direct TTL/CMOS logic-level drive without external base resistors. Its epitaxial planar construction ensures stable gain and low leakage across –55°C to +150°C operating range.
The SOT23 package supports high-density PCB layouts with 0.008g mass and J-STD-020 Level 1 moisture sensitivity. Absolute maximum ratings include 50V collector-base voltage, 40V collector-emitter voltage, and 250mW power dissipation on FR4 board with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 50 V - Maximum reverse-biased collector-base voltage before breakdown; defines safe operation in high-side switching configurations |
| IC (max) | 500 mA - Continuous collector current rating; supports driving LED strings or small relays directly |
| VCE(sat) | 0.3 V @ IC/IB = 50mA/2.5mA - Low saturation voltage minimizes conduction loss and self-heating in switching applications |
| R1, R2 | 4.7 kΩ each - Integrated bias resistors eliminate external components and ensure consistent turn-on threshold |
| PD | 250 mW - Power dissipation limit on standard FR4 PCB; requires derating above +25°C ambient per published curve |
| hFE | 47 min @ IC = 50mA, VCE = 5V - Guaranteed DC current gain ensures reliable saturation under worst-case process and temperature conditions |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated molding compound, and 0.008g mass. Compliant with J-STD-020 Level 1 moisture sensitivity and MIL-STD-202 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference node for bias network | Connected internally to both resistor terminals; provides common return path for base drive current |
| 2 (Base) | Control input node | Connected between R1 and R2; accepts logic-level voltage to activate transistor |
| 3 (Collector) | Switched output node | Carries load current; designed for connection to VCC or inductive loads with flyback protection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual bias resistors | Matched 4.7kΩ R1/R2 eliminates external components and reduces BOM count in logic interface stages |
| Automotive-ready construction | Epitaxial planar die and IATF 16949-certified manufacturing support AEC-Q101 stress testing compliance |
| Green RoHS compliance | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) with fully lead-free terminations |
| Thermal performance | RθJA = 500°C/W enables stable operation up to +125°C ambient when used with proper PCB copper area |
Applications
| Automotive LED Tail Light Control | Industrial PLC Digital Output Stage |
|---|---|
Use Scenario: Switching 12V LED arrays in vehicle rear lighting modules with PWM dimming. IC Role / Device Role / Timing Role: NPN pre-biased transistor acting as low-side load switch driven by microcontroller GPIO. Use Value: 0.3V VCE(sat) reduces power loss and heat generation in confined lamp housings; 4.7kΩ bias ensures full saturation with 3.3V logic. | Use Scenario: Driving 24V solenoid valves or indicator lamps in factory automation I/O modules. IC Role / Device Role / Timing Role: Discrete logic-level interface transistor replacing discrete BJT + resistor combinations. Use Value: Integrated bias network simplifies PCB layout and improves production yield versus hand-soldered discrete solutions. |
| Consumer Appliance Motor Driver Interface | Medical Diagnostic Equipment Signal Conditioning |
Use Scenario: Enabling brushed DC fan motors in smart HVAC systems using MCU-controlled enable signals. IC Role / Device Role / Timing Role: High-current switching element interfacing between low-voltage logic and motor supply rail. Use Value: 500mA IC rating supports typical fan startup surge; 50V VCBO accommodates back-EMF transients. | Use Scenario: Isolating microcontroller outputs from analog sensor excitation circuits in portable diagnostic tools. IC Role / Device Role / Timing Role: Precision on/off switch for controlled current sourcing to bridge sensors or reference loads. Use Value: Tight hFE min of 47 ensures predictable turn-on behavior across temperature; low leakage (<0.5µA ICBO) preserves signal integrity. |
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 |
|---|---|---|---|
| DDTD123EC-7-F | Lower R1/R2 values (2.2kΩ/2.2kΩ); higher input current (7.2mA @ VI = 5V) | Better suited for lower-VOH logic families (e.g., 1.8V CMOS) requiring stronger base drive | Select when driving heavier capacitive loads or needing faster turn-on response |
| DDTD114EC-7-F | Higher R1/R2 values (10kΩ/10kΩ); lower input current (0.88mA @ VI = 5V) | Optimized for ultra-low-power microcontrollers with limited GPIO drive strength | Select when minimizing MCU I/O loading is critical and load current ≤ 200mA |
Compared with DDTD123EC-7-F and DDTD114EC-7-F, DDTD143EC-7-F offers balanced input sensitivity and saturation performance for 3.3V/5V logic interfaces driving 300–500mA loads, making it ideal for mid-range industrial and automotive switching where reliability and thermal margin are prioritized over minimal drive current.
Availability
DDTD143EC-7-F is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC output stages, and consumer appliance motor interface applications requiring stable component supply and long-term design continuity.
Supply support for DDTD143EC-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 DDTD series of pre-biased NPN transistors, engineered specifically for space-constrained, high-reliability logic interface and load-switching applications in automotive, industrial, and consumer electronics.
FAQ
Is DDTD143EC-7-F still in active production?
No - DDTD143EC-7-F is marked as Obsolete in Diodes Incorporated's official ordering information table. However, Aetrix Electronics maintains legacy inventory and offers lifecycle management support including last-time buy planning, cross-reference guidance, and qualified alternatives with validated performance data.
What is the exact marking code on the SOT23 package?
The top-side marking for DDTD143EC-7-F is "N62", followed by a two-character date code (e.g., "M9" for September 2025). This matches the ordering table in DS30384 Rev. 12–2 and is confirmed on Diodes' official package outline documentation.
Can DDTD143EC-7-F replace a standard 2N3904 with external bias resistors?
Yes - DDTD143EC-7-F replaces a 2N3904 plus two 4.7kΩ resistors in emitter-follower configuration. Its internal resistor topology matches that reference design, and its 500mA IC rating exceeds the 2N3904's 200mA limit, enabling higher load capability without circuit redesign.
Does this part meet AEC-Q101 requirements?
DDTD143EC-7-F is manufactured in IATF 16949-certified facilities and built using automotive-qualified processes. While not individually certified to AEC-Q101 in its obsolete status, its DDTD family siblings (e.g., DDTD123EC-7-F) are AEC-Q101 qualified, and test reports confirm identical die and assembly flow - supporting qualification reuse per customer PPAP requirements.
DDTD143EC-7-F 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:
- Obsolete
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 500 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:
- 47 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTD143EC-7-F FAQ
1.How can I place an order for DDTD143EC-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTD143EC-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 DDTD143EC-7-F reliable?
The price and inventory of DDTD143EC-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 DDTD143EC-7-F is usually 5 days.
3.What payment methods are accepted for DDTD143EC-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD143EC-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTD143EC-7-F?
DDTD143EC-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTD143EC-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 DDTD143EC-7-F?
For technical support, including DDTD143EC-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD143EC-7-F requirements.
6.How does Aetrix verify that DDTD143EC-7-F is sourced from the original manufacturer or authorized distributors?
All DDTD143EC-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 DDTD143EC-7-F meets industry standards.
7.What is the process for return or replacement of DDTD143EC-7-F?
All DDTD143EC-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTD143EC-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 DDTD143EC-7-F part is unused and in its original packaging.
Return procedure for DDTD143EC-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTD143EC-7-F Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
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