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Diodes Incorporated DDTC123TUA-7
- Part No.:
- DDTC123TUA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTC123TUA-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,658
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Product details
Overview
DDTC123TUA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT323 package, featuring a single built-in 2.2 kΩ bias resistor (R1 only), 50 V VCEO, 100 mA IC(max), and 200 mW power dissipation. It enables simplified switching and digital logic interface functions in space-constrained consumer and industrial PCBs.
For engineers reviewing the DDTC123TUA-7 datasheet, DDTC123TUA-7 pinout, DDTC123TUA-7 application, or DDTC123TUA-7 equivalent, key selection criteria include verified R1 tolerance (±30%), hFE range (100–600 at IC = 1 mA), VCE(sat) ≤ 0.3 V under multiple drive conditions, and SOT323 thermal resistance (625 °C/W on FR4).
Technical Context
This device integrates a monolithic NPN transistor with a precision laser-trimmed 2.2 kΩ base bias resistor (R1), eliminating external bias components for digital switching. Its epitaxial planar die construction ensures stable gain and low leakage across -55°C to +150°C operating range.
The SOT323 package supports automated pick-and-place assembly and delivers 0.006 g weight with UL 94V-0 molding compound. Electrical behavior is characterized at IC/IB ratios from 10 to 100, with VCE(sat) validated at five distinct drive levels including 1 mA/0.1 mA and 5 mA/0.5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Supports rail voltages up to 48 V DC without breakdown in switching applications |
| IC(max) | 100 mA - Suitable for driving LEDs, relays, and low-power logic gates |
| R1 (Nominal) | 2.2 kΩ - Fixed base bias resistor enabling single-resistor drive from 3.3 V or 5 V microcontrollers |
| hFE | 100–600 - Ensures reliable saturation across production lots at IC = 1 mA, VCE = 5 V |
| VCE(sat) | ≤ 0.3 V - Confirmed at IC/IB = 1 mA/0.1 mA, minimizing conduction loss in active-low switches |
| PD | 200 mW - Derates linearly above 25°C ambient per 625 °C/W RθJA on standard FR4 layout |
Pinout & Package
Package: SOT323 - 3-terminal surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), and 0.006 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal of NPN transistor | Reference node for current return path; connected to ground or low-side reference in switch configurations |
| 2 (Base) | Transistor base input with internal R1 connection | Single-point control input; R1 connects internally between pin 2 and pin 3, eliminating external bias resistor |
| 3 (Collector) | Collector terminal of NPN transistor | Switched output node; carries load current up to 100 mA when saturated |
Key Features
| Feature | Design Value |
|---|---|
| Pre-biased configuration | Single integrated 2.2 kΩ base resistor (R1 only) reduces BOM count and layout area by removing external bias network |
| Automated assembly compatibility | SOT323 footprint meets IPC-7351B standards and supports high-speed pick-and-place with 0.65 mm lead pitch |
| Green material compliance | Halogen- and antimony-free molding compound (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) certified per IEC 61249-2-21 |
| Thermal performance | 625 °C/W junction-to-ambient resistance on minimum pad layout enables operation up to +125°C ambient at full 100 mA load |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU outputs in portable instrumentation. IC Role / Device Role / Timing Role: Low-side NPN switch controlled directly by MCU GPIO without external base resistor. Use Value: Eliminates discrete bias resistor, reducing component count and board area while maintaining guaranteed VCE(sat) ≤ 0.3 V at IC = 20 mA. | Use Scenario: Level-shifting and signal inversion between mixed-voltage logic domains (e.g., 1.8 V FPGA to 5 V peripheral). IC Role / Device Role / Timing Role: Digital inverter with fixed gain and predictable propagation delay due to monolithic R1-transistor integration. Use Value: Provides consistent hFE (100–600) and fast turn-on/turn-off enabled by 250 MHz fT, supporting >10 MHz digital switching. |
| Power Supply Enable Switch | Industrial Sensor Interface |
Use Scenario: Enabling/disabling 12 V auxiliary rails in programmable logic controllers using 3.3 V control signals. IC Role / Device Role / Timing Role: High-side or low-side enable switch with 50 V VCEO margin and 100 mA continuous rating. Use Value: Withstands transient overvoltage up to 50 V and sustains 100 mA load current with ≤0.3 V dropout, minimizing power loss in always-on subsystems. | Use Scenario: Interfacing open-collector sensor outputs (e.g., Hall effect, proximity) to 3.3 V ADC inputs in factory automation systems. IC Role / Device Role / Timing Role: Signal conditioning buffer with ESD-robust input (VEBO = 5 V) and low-leakage cutoff (IEBO ≤ 0.5 µA). Use Value: Maintains signal integrity across -55°C to +150°C ambient via specified ICBO ≤ 0.5 µA at VCB = 50 V, ensuring reliability in harsh environments. |
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 |
|---|---|---|---|
| NSBC123T1G | Same SOT-323 package, but dual-R (R1+R2) configuration with 2.2 kΩ/10 kΩ divider; higher input impedance | Requires different drive voltage thresholds; less suitable for direct 3.3 V GPIO drive without level adjustment | Select when precise base voltage division or higher noise immunity is required |
| DTC123YKAT146 | Same R1 value (2.2 kΩ), but SOT-23 package; 350 mW PD; hFE min 35 at IC = 10 mA | Larger footprint and higher thermal mass; better for higher-current loads but incompatible with ultra-dense layouts | Select when >100 mA peak current or improved thermal margin is needed |
Compared with NSBC123T1G and DTC123YKAT146, DDTC123TUA-7 offers the smallest footprint (SOT323), tightest hFE range (100–600), and lowest VCE(sat) at low drive currents-making it optimal for miniaturized, low-power digital switching where board space and 3.3 V compatibility are critical.
Availability
DDTC123TUA-7 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, and power supply enable switches requiring stable component supply and RoHS-compliant manufacturing.
Supply support for DDTC123TUA-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 the Americas.
The DDTC (R1-only series) UA product line targets cost-sensitive, space-constrained digital switching applications in consumer electronics, industrial controls, and automotive body electronics-emphasizing simplified BOMs and automated assembly readiness.
FAQ
What is the function of the internal resistor in DDTC123TUA-7?
The internal 2.2 kΩ resistor (R1) connects between the base and collector terminals, providing automatic biasing for NPN transistor operation. This eliminates the need for an external base resistor when used as a digital switch, simplifying circuit design and reducing PCB area. It is laser-trimmed to ±30% tolerance and validated across temperature and process variations.
Can DDTC123TUA-7 be used in automotive applications?
DDTC123TUA-7 is not AEC-Q101 qualified out-of-the-box. While it operates across -55°C to +150°C and uses green, halogen-free materials, automotive qualification requires additional PPAP documentation, change control, and IATF 16949-manufactured lots. Customers must contact Diodes Incorporated directly to request AEC-Q101-compliant versions such as DDTC123TUAQ-7.
How does the SOT323 package affect thermal performance?
The SOT323 package has a thermal resistance of 625 °C/W (junction-to-ambient) when mounted on FR4 with minimum recommended pad layout. At 100 mA collector current and 0.3 V saturation voltage, power dissipation is 30 mW-well below the 200 mW absolute maximum-allowing safe operation up to +125°C ambient without heatsinking or thermal derating.
Is DDTC123TUA-7 compatible with lead-free reflow processes?
Yes. DDTC123TUA-7 is fully RoHS 3 compliant (2015/863/EU), lead-free, and qualified for standard Pb-free reflow profiles per J-STD-020. Its matte tin-plated leads meet MIL-STD-202 Method 208 solderability requirements, and the UL 94V-0 molding compound withstands peak reflow temperatures up to 260°C for 30 seconds.
DDTC123TUA-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):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 5mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTC123TUA-7 FAQ
1.How can I place an order for DDTC123TUA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC123TUA-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 DDTC123TUA-7 reliable?
The price and inventory of DDTC123TUA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC123TUA-7 is usually 5 days.
3.What payment methods are accepted for DDTC123TUA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC123TUA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC123TUA-7?
DDTC123TUA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC123TUA-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 DDTC123TUA-7?
For technical support, including DDTC123TUA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC123TUA-7 requirements.
6.How does Aetrix verify that DDTC123TUA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC123TUA-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 DDTC123TUA-7 meets industry standards.
7.What is the process for return or replacement of DDTC123TUA-7?
All DDTC123TUA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC123TUA-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 DDTC123TUA-7 part is unused and in its original packaging.
Return procedure for DDTC123TUA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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