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Diodes Incorporated DDTC144EUA-7
- Part No.:
- DDTC144EUA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC144EUA-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:12
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Product details
Overview
DDTC144EUA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT323 package, featuring integrated bias resistors R1 = R2 = 47 kΩ, DC current gain (hFE) of 68 at IC = 5 mA and VCE = 5 V, VCEO = 50 V, and IO = 100 mA max output current - used for level-shifting and digital switching in automotive body control modules.
For engineers reviewing the DDTC144EUA-7 datasheet, DDTC144EUA-7 pinout, DDTC144EUA-7 application, or DDTC144EUA-7 equivalent, key selection criteria include input voltage threshold (VIN(ON) = 1.4–3.0 V), saturation voltage (VCE(SAT) ≤ 0.3 V at IC/IB = 10 mA/0.5 mA), thermal resistance (RθJA = 625 °C/W), and AEC-Q101 qualification for automotive reliability.
Technical Context
This device integrates two matched 47 kΩ bias resistors (R1 = R2) to configure a single-NPN inverter with fixed base biasing, eliminating external resistor placement. It operates as a digital switch with defined turn-on/off thresholds and supports rail-to-rail input logic compatibility across 3.3 V and 5 V systems.
The SOT323 package enables high-density PCB layout while maintaining thermal performance up to +150 °C junction temperature. Its complementary PNP counterpart is DDTA144EUA-7, and it shares identical electrical and thermal specs with the automotive-grade DDTC144EUAQ-7-F variant except for PPAP documentation support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; supports 24 V automotive supply rails with margin. |
| IC(max) | 100 mA - Continuous collector current rating; suitable for driving LEDs, relays, and small solenoids. |
| hFE | 68 (min) at IC = 5 mA, VCE = 5 V - Ensures stable saturation under typical microcontroller GPIO drive conditions. |
| R1 = R2 | 47 kΩ ±30% - Matched internal bias network eliminates external components and reduces BOM count. |
| VCE(SAT) | ≤0.3 V at IC/IB = 10 mA/0.5 mA - Low saturation voltage minimizes power loss and self-heating in switching mode. |
| PD | 200 mW - Power dissipation limit on FR-4 board; defines maximum continuous switching duty at ambient temperatures ≤ +85 °C. |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), moisture sensitivity level 1, matte tin-plated leads, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for current sink operation; connected to ground or low-side return path. |
| 2 (Base) | Input node via R1/R2 divider | Internal connection point between two 47 kΩ resistors; accepts logic-level input without external biasing. |
| 3 (Collector) | Output node | Switched high-side output; delivers up to 100 mA load current when saturated. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 47 kΩ matched resistors eliminate external components and reduce layout complexity for digital switching. |
| AEC-Q101 qualified | Qualified for automotive applications including body electronics, lighting, and HVAC controls per stress test requirements. |
| Green, halogen-free construction | Meets RoHS 3 (2015/863/EU) and contains <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with global environmental standards. |
| SOT323 footprint | Enables compact PCB designs with 0.65 mm pitch; compatible with standard reflow profiles and automated assembly. |
Applications
| Automotive Door Module | Industrial PLC Output Stage |
|---|---|
Use Scenario: Driving window lift motor enable signals and mirror fold/unfold relays in door control units. IC Role / Device Role / Timing Role: Digital switch translating MCU GPIO outputs into isolated 12 V/24 V load control paths. Use Value: Eliminates discrete base resistors and ensures consistent turn-on behavior across temperature (-40 °C to +125 °C). |
Use Scenario: Interfacing programmable logic controller outputs to 24 V DC solenoid valves and indicator lamps. IC Role / Device Role / Timing Role: Level-shifting interface between 3.3 V/5 V logic and industrial 24 V field-side loads. Use Value: Reduces component count per channel and improves long-term reliability in vibration-prone environments. |
| LED Lighting Control | USB-C Power Path Switching |
Use Scenario: Controlling multi-color status LEDs in infotainment displays and instrument clusters. IC Role / Device Role / Timing Role: Constant-current sink switch enabling PWM dimming with minimal external parts. Use Value: Maintains <0.3 V saturation drop at 20 mA, preserving LED forward voltage headroom and efficiency. |
Use Scenario: Enabling/disabling VBUS power paths in USB-C receptacles based on CC logic detection. IC Role / Device Role / Timing Role: Fast-response digital switch isolating power domains during plug insertion/removal events. Use Value: Supports <1 µs propagation delay (typical) and withstands 50 V transients common in hot-swap scenarios. |
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 |
|---|---|---|---|
| DDTC144EUAQ-7-F | Identical electrical and thermal specs; includes PPAP documentation and automotive traceability. | Required for Tier-1 automotive production programs needing full AS9100-aligned quality records. | Select when formal automotive qualification evidence (e.g., PPAP Level 3) is contractually mandated. |
| NSV144EUT1G | Same R1=R2=47 kΩ, but hFE min = 56 (vs. 68); VCEO = 50 V; not AEC-Q101 qualified. | Suitable for industrial or consumer applications where automotive reliability is not required. | Choose for cost-sensitive non-automotive designs where lower hFE margin is acceptable and qualification is unnecessary. |
Compared with DDTC144EUA-7, the DDTC144EUAQ-7-F adds PPAP capability without altering performance, while NSV144EUT1G trades qualification and gain margin for lower unit cost in non-automotive use cases.
Availability
DDTC144EUA-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, LED driver circuits, and USB-C power path management requiring stable component supply and long-term lifecycle assurance.
Supply support for DDTC144EUA-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, 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) pre-biased transistor family, designed specifically to simplify digital interface design in space-constrained, high-reliability applications such as automotive electronics and industrial automation.
FAQ
What is the maximum operating temperature for DDTC144EUA-7?
The DDTC144EUA-7 has an operating junction temperature range of –55 °C to +150 °C. Its thermal resistance RθJA is 625 °C/W on FR-4 PCB with minimum pad layout, meaning it can sustain continuous operation at +85 °C ambient when dissipating ≤100 mW. Derating is required above that power level.
Is DDTC144EUA-7 pin-compatible with other pre-biased transistors in SOT323?
Yes - DDTC144EUA-7 uses standard SOT323 pinout (Emitter-Base-Collector on pins 1-2-3), matching industry-standard pre-biased NPN devices like DDTA144EUA-7 (complementary PNP) and NSV144EUT1G. Layout reuse is possible, but verify R1/R2 values and hFE requirements per application.
Does DDTC144EUA-7 require external bias resistors?
No - it integrates two 47 kΩ bias resistors (R1 = R2) internally, forming a fixed-base configuration. This eliminates the need for external resistors in standard inverter or switch applications, reducing PCB area and improving consistency across production batches.
How does the AEC-Q101 qualification impact usage in non-automotive designs?
AEC-Q101 qualification confirms robustness against mechanical shock, temperature cycling, and humidity exposure - benefits that extend to harsh industrial or outdoor environments. While not required outside automotive, it provides measurable reliability uplift over standard-qualified equivalents without increasing cost or footprint.
DDTC144EUA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Resistor - Base (R1):
- -
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- -
- Power - Max:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
DDTC144EUA-7 FAQ
1.How can I place an order for DDTC144EUA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144EUA-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 DDTC144EUA-7 reliable?
The price and inventory of DDTC144EUA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144EUA-7 is usually 5 days.
3.What payment methods are accepted for DDTC144EUA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144EUA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144EUA-7?
DDTC144EUA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144EUA-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 DDTC144EUA-7?
For technical support, including DDTC144EUA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144EUA-7 requirements.
6.How does Aetrix verify that DDTC144EUA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC144EUA-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 DDTC144EUA-7 meets industry standards.
7.What is the process for return or replacement of DDTC144EUA-7?
All DDTC144EUA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144EUA-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 DDTC144EUA-7 part is unused and in its original packaging.
Return procedure for DDTC144EUA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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