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Diodes Incorporated DDTC123EUA-7
- Part No.:
- DDTC123EUA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTC123EUA-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,938
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Product details
Overview
DDTC123EUA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT323 package, featuring integrated bias resistors R1 = R2 = 2.2 kΩ, VCEO = 50 V, IC(max) = 100 mA, and DC current gain (hFE) ≥ 20 at IC = 20 mA. It is AEC-Q101 qualified and RoHS-compliant, designed for digital switching in automotive body control modules.
For engineers reviewing the DDTC123EUA-7 datasheet, DDTC123EUA-7 pinout, DDTC123EUA-7 application, or DDTC123EUA-7 equivalent, key selection factors include input threshold voltage (VIN(OFF) ≤ 1.1 V), output saturation voltage (VCE(SAT) ≤ 0.3 V @ IC/IB = 10 mA/0.5 mA), thermal resistance (RθJA = 625 °C/W), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This device integrates two matched 2.2 kΩ bias resistors (R1 = R2) to configure a single-NPN inverter with fixed base drive, eliminating external bias components. Its SOT323 footprint supports high-density PCB layouts while maintaining thermal performance up to +150 °C junction temperature.
The transistor operates as a saturated switch with guaranteed VCE(SAT) ≤ 0.3 V at IC = 20 mA and IB = 0.5 mA, and exhibits fT = 250 MHz for moderate-speed digital interface applications. Input voltage thresholds are specified across temperature to ensure robust logic-level compatibility with 3.3 V and 5 V microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V automotive supply rails with margin. |
| IC(max) | 100 mA - Continuous collector current rating; supports driving LEDs, relays, or logic inputs in low-power control nodes. |
| R1 = R2 | 2.2 kΩ ±30% - Matched internal base bias resistors; eliminates need for external pull-up/pull-down networks in inverter configurations. |
| VCE(SAT) | ≤ 0.3 V @ IC/IB = 20 mA/0.5 mA - Low saturation voltage minimizes power loss and self-heating during switching. |
| hFE | ≥ 20 @ VCE = 5 V, IC = 20 mA - Guaranteed DC current gain ensures reliable saturation under worst-case conditions. |
| RθJA | 625 °C/W - Thermal resistance on FR-4 board; defines maximum power dissipation (200 mW) at +25 °C ambient. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics, including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SOT323 - 3-pin surface-mount plastic package, 2.15 mm × 2.10 mm × 0.95 mm, moisture sensitivity level 1, matte tin-plated leads.
| 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 network | Internal connection point between two 2.2 kΩ resistors; accepts logic-level input (0–12 V). |
| 3 (Collector) | Output node | Switched high-side output; drives load between VCC and collector with controlled saturation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 2.2 kΩ matched resistors reduce BOM count and layout area for inverter circuits. |
| AEC-Q101 qualification | Validated for automotive under-hood and body control applications requiring extended temperature and reliability assurance. |
| SOT323 package | Compact 3-pin footprint compatible with standard pick-and-place equipment and reflow profiles. |
| Halogen- and antimony-free "Green" construction | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets global environmental compliance mandates without performance trade-offs. |
Applications
| Automotive Door Module | Industrial PLC Input Stage |
|---|---|
|
Use Scenario: Level-shifting and inversion of CAN/LIN bus wake-up signals in door control units. IC Role / Device Role / Timing Role: Digital inverter switch translating 3.3 V MCU GPIO to 12 V load-driving capability. Use Value: Eliminates discrete resistor network while maintaining AEC-Q101 reliability and <0.3 V saturation drop for minimal power loss. |
Use Scenario: Isolating and conditioning 24 V field sensor inputs into 5 V logic-compatible levels for microcontroller ADCs. IC Role / Device Role / Timing Role: Input stage buffer and voltage translator in industrial digital input modules. Use Value: Provides defined VIN(OFF) ≤ 1.1 V and VIN(ON) ≥ 1.9 V for noise-immune switching in electrically noisy factory environments. |
| LED Indicator Driver | USB Port Power Switch |
|
Use Scenario: Driving status LEDs in infotainment head units with precise current limiting and low standby leakage. IC Role / Device Role / Timing Role: Low-side current sink switch enabling LED on/off control from MCU GPIO. Use Value: Delivers 100 mA IC capability with <0.5 µA IO(OFF) leakage, ensuring zero-current LED off-state in sleep mode. |
Use Scenario: Enabling/disabling VBUS power to downstream USB peripherals in docking stations. IC Role / Device Role / Timing Role: High-side load switch controller interfacing with USB PD policy engine outputs. Use Value: Supports fast turn-on (via 2.2 kΩ R1/R2 network) and guarantees VCE(SAT) ≤ 0.3 V to minimize voltage drop across USB 5 V rail. |
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 |
|---|---|---|---|
| DDTC123YKA-7 | Same R1 = R2 = 2.2 kΩ, but in SOT23 package (larger footprint, higher RθJA = 350 °C/W) | Preferred where thermal margin >625 °C/W is required or legacy SOT23 tooling is used | Select when board space allows larger package and higher power dissipation is needed. |
| NSVD123ET1G | Identical R1 = R2 = 2.2 kΩ, AEC-Q101 qualified, but VCEO = 40 V and IC(max) = 100 mA | Restricted to ≤40 V systems; not suitable for 48 V mild-hybrid architectures | Choose only if system VCC remains ≤40 V and SOT323 footprint compatibility is confirmed. |
Compared with DDTC123YKA-7, DDTC123EUA-7 offers superior board-area efficiency and tighter thermal coupling on dense automotive PCBs; versus NSVD123ET1G, it provides 10 V higher breakdown margin critical for transients in 24 V battery systems.
Availability
DDTC123EUA-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, LED indicator drivers, and USB port power switches requiring stable component supply and AEC-Q101 compliance.
Supply support for DDTC123EUA-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, engineered specifically for simplified digital switching in automotive and industrial control systems where space, reliability, and qualification are critical.
FAQ
What is the maximum operating temperature for DDTC123EUA-7?
The DDTC123EUA-7 has an operating junction temperature range of –55 °C to +150 °C, validated per AEC-Q101 requirements. Its SOT323 package achieves this with RθJA = 625 °C/W on standard FR-4 PCBs using minimum recommended pad layout per Diodes' package outline documentation.
Does DDTC123EUA-7 require external bias resistors?
No. DDTC123EUA-7 integrates two matched 2.2 kΩ resistors (R1 = R2) internally, forming a complete NPN inverter circuit. No external bias components are needed-only the input signal applied to Pin 2 and load connected between Pin 3 (collector) and VCC.
Is DDTC123EUA-7 pin-compatible with other pre-biased transistors in SOT323?
Yes-DDTC123EUA-7 uses standard SOT323 pinout (Emitter-Base-Collector on Pins 1-2-3), matching industry-standard assignments. However, electrical parameters (e.g., R1/R2 values, hFE, VCEO) differ across variants like DDTC143EUA or DDTA123EUA (PNP complement), so functional substitution requires verification.
How does the R1/R2 tolerance affect switching performance?
R1 and R2 have a ±30% tolerance, meaning the actual base current may vary by up to ±30% from nominal. This is accounted for in the guaranteed hFE ≥ 20 and VCE(SAT) ≤ 0.3 V specs, ensuring reliable saturation even under worst-case resistor drift across temperature and process variation.
DDTC123EUA-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:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- 2.2 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20 @ 20mA, 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
DDTC123EUA-7 FAQ
1.How can I place an order for DDTC123EUA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC123EUA-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 DDTC123EUA-7 reliable?
The price and inventory of DDTC123EUA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC123EUA-7 is usually 5 days.
3.What payment methods are accepted for DDTC123EUA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC123EUA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC123EUA-7?
DDTC123EUA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC123EUA-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 DDTC123EUA-7?
For technical support, including DDTC123EUA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC123EUA-7 requirements.
6.How does Aetrix verify that DDTC123EUA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC123EUA-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 DDTC123EUA-7 meets industry standards.
7.What is the process for return or replacement of DDTC123EUA-7?
All DDTC123EUA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC123EUA-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 DDTC123EUA-7 part is unused and in its original packaging.
Return procedure for DDTC123EUA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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