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Diodes Incorporated DDTC143ECA-7-F
- Part No.:
- DDTC143ECA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTC143ECA-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:83,271
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Product details
Overview
DDTC143ECA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package with integrated bias resistors R1 = R2 = 4.7 kΩ, VCEO = 50 V, IC(max) = 100 mA, and VCE(sat) ≤ 0.3 V at IC/IB = 20 mA/0.5 mA. It is AEC-Q101 qualified and used for level-shifting and digital switching in automotive body control modules.
For engineers reviewing the DDTC143ECA-7-F datasheet, DDTC143ECA-7-F pinout, DDTC143ECA-7-F application, or DDTC143ECA-7-F equivalent, key selection criteria include input voltage threshold (VIN(on) = 1.9 V typ), output saturation voltage, DC current gain (hFE = 20 min), thermal resistance (RθJA = 625 °C/W), and AEC-Q101 qualification status.
Technical Context
This device integrates two matched 4.7 kΩ bias resistors to configure a single-NPN digital switch with fixed base drive ratio, eliminating external resistor layout and reducing BOM count. Its internal topology enables direct TTL/CMOS logic interfacing without pull-up or current-limiting components.
Designed for high-reliability automotive applications, it operates across –55°C to +150°C, supports 50 V collector-emitter breakdown, and delivers stable DC current gain (20–80) over IC = 1–20 mA range while maintaining VCE(sat) ≤ 0.3 V under defined load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum allowable collector-to-emitter voltage before breakdown; sets upper rail limit for 12 V/24 V automotive systems. |
| IC(max) | 100 mA - Continuous collector current rating; supports driving LEDs, relays, or logic inputs in low-power control nodes. |
| R1 = R2 | 4.7 kΩ ±30% - Matched on-die bias resistors enabling predictable turn-on behavior and eliminating external component tolerance stack-up. |
| VCE(sat) | ≤ 0.3 V @ IC/IB = 20 mA/0.5 mA - Ensures minimal power loss and heat generation during saturated switching. |
| hFE | 20 (min) @ VCE = 5 V, IC = 20 mA - Guarantees sufficient current amplification for reliable logic-level interface without marginal conduction. |
| PD | 200 mW @ TA = 25°C - Defines maximum dissipation on standard FR4 PCB; derates linearly above 25°C per RθJA = 625 °C/W. |
| AEC-Q101 | Qualified - Confirms suitability for automotive applications including temperature cycling, humidity, and mechanical shock testing per stress test plan. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3 terminals, JEDEC TO-236AB compliant, moisture sensitivity level 1, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for bias network; connects to ground or low-side return path in common-emitter configuration. |
| 2 (Base) | Input node (via R1/R2 divider) | Accepts logic-level input; internal R1-R2 network sets base current automatically-no external resistor required. |
| 3 (Collector) | Output node | Drives load between VCC and collector; sinks up to 100 mA when saturated with ≤0.3 V drop. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 4.7 kΩ matched resistors reduce component count and improve production consistency vs. discrete resistor + transistor solutions. |
| AEC-Q101 qualification | Validated for automotive underhood environments including thermal cycling, HAST, and mechanical vibration per AEC stress test plan. |
| VIN(on) = 1.9 V (typ) | Enables direct interface with 3.3 V and 5 V CMOS/TTL outputs without level translation or additional pull-up. |
| Green construction | Halogen- and antimony-free molding compound (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) meets RoHS 3 and automotive environmental requirements. |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Interface |
|---|---|
Use Scenario: Driving LED indicators and solenoid valves in door module and lighting control subassemblies. IC Role / Device Role / Timing Role: Digital switch translating microcontroller GPIO signals into higher-current loads with guaranteed saturation. Use Value: Eliminates need for external base resistor and reduces PCB area by ~2.5 mm² per channel versus discrete solution. | Use Scenario: Isolating and conditioning analog sensor outputs before ADC sampling in PLC I/O modules. IC Role / Device Role / Timing Role: Level-shifting buffer between 3.3 V sensor ICs and 5 V/12 V signal conditioning stages. Use Value: Maintains clean logic thresholds across temperature (–40°C to +125°C) due to matched internal resistors and tight VIN(on) spec. |
| Consumer Appliance Control Board | Medical Diagnostic Equipment |
Use Scenario: Controlling relay coils and display backlight drivers in smart washing machine control panels. IC Role / Device Role / Timing Role: Low-power, high-reliability switching element for microcontroller-driven actuator interfaces. Use Value: Supports 100,000+ switching cycles with <0.3 V VCE(sat) ensuring minimal self-heating and long-term contact reliability. | Use Scenario: Enabling/disabling analog front-end power rails in portable ultrasound and ECG signal chains. IC Role / Device Role / Timing Role: Precision enable switch with fast turn-on (tON < 100 ns typical) and low leakage (<0.5 μA off-state). Use Value: Prevents cross-talk and standby current leakage in battery-powered diagnostic devices meeting IEC 60601-1 safety margins. |
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 |
|---|---|---|---|
| DDTC123ECA-7-F | R1 = R2 = 2.2 kΩ; lower input threshold (VIN(on) = 1.1 V typ); higher IB draw (3.8 mA @ 5 V) | Better suited for 1.8 V/3.3 V logic families requiring lower turn-on voltage | Select when driving from low-voltage MCUs or where faster switching speed is prioritized over power efficiency. |
| DDTC114ECA-7-F | R1 = R2 = 10 kΩ; higher input impedance (IB = 0.88 mA @ 5 V); reduced max IC = 50 mA | Optimized for ultra-low-power wake-up circuits and battery-backed monitoring nodes | Choose for energy-constrained applications where standby current and thermal budget are critical. |
Compared with DDTC123ECA-7-F and DDTC114ECA-7-F, DDTC143ECA-7-F balances input drive strength, saturation performance, and thermal margin-making it ideal for 5 V automotive and industrial control where robustness and consistent turn-on behavior are essential.
Availability
DDTC143ECA-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer appliance control boards requiring stable component supply and AEC-Q101 compliance.
Supply support for DDTC143ECA-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, specializing in high-reliability components for automotive, industrial, and computing markets.
This part belongs to the DDTC (R1 = R2 Series) CA family-designed specifically for simplified digital switching in space-constrained, high-volume applications where AEC-Q101 qualification and green packaging are mandatory.
FAQ
What is the maximum operating temperature for DDTC143ECA-7-F?
The device is rated for junction and storage temperatures from –55°C to +150°C. Its thermal resistance RθJA is 625 °C/W on FR4 board with minimum pad layout, allowing safe operation up to +125°C ambient in typical automotive under-hood environments when power dissipation remains below derated limits.
Does DDTC143ECA-7-F require an external base resistor?
No. It integrates two matched 4.7 kΩ bias resistors (R1 = R2) internally, forming a complete pre-biased NPN switch. This eliminates the need for external base resistors, simplifies PCB layout, and improves manufacturing yield compared to discrete transistor + resistor combinations.
Is DDTC143ECA-7-F compatible with lead-free reflow soldering?
Yes. It is fully RoHS 3 compliant, lead-free, halogen-free, and antimony-free. The matte tin-plated leads meet MIL-STD-202 Method 208 solderability requirements and are qualified for standard Pb-free reflow profiles up to 260°C peak temperature per J-STD-020 Level 1 moisture sensitivity.
How does the R1 = R2 architecture affect switching behavior?
The matched resistor network ensures consistent base current relative to input voltage, delivering predictable turn-on characteristics across process and temperature. Unlike asymmetric bias networks, this topology maintains stable VIN(on) (1.9 V typ) and minimizes variation in IC/IB ratio-critical for deterministic logic-level interfacing in safety-critical systems.
DDTC143ECA-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:
- 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:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTC143ECA-7-F FAQ
1.How can I place an order for DDTC143ECA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC143ECA-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 DDTC143ECA-7-F reliable?
The price and inventory of DDTC143ECA-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 DDTC143ECA-7-F is usually 5 days.
3.What payment methods are accepted for DDTC143ECA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC143ECA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC143ECA-7-F?
DDTC143ECA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC143ECA-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 DDTC143ECA-7-F?
For technical support, including DDTC143ECA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC143ECA-7-F requirements.
6.How does Aetrix verify that DDTC143ECA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC143ECA-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 DDTC143ECA-7-F meets industry standards.
7.What is the process for return or replacement of DDTC143ECA-7-F?
All DDTC143ECA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC143ECA-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 DDTC143ECA-7-F part is unused and in its original packaging.
Return procedure for DDTC143ECA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC143ECA-7-F Tags
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MUN5211T1G
onsemi
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