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Diodes Incorporated DDTC124XUA-7
- Part No.:
- DDTC124XUA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC124XUA-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:42
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Product details
Overview
DDTC124XUA-7 from Diodes Incorporated is a 50V NPN pre-biased transistor in SOT323 package with integrated R1 = 22kΩ and R2 = 47kΩ bias resistors, designed for digital switching applications requiring low input drive current (0.36mA at VIN = 5V), fast saturation (VOUT(on) ≤ 0.3V), and DC current gain of 68 at IC = 5mA. It operates across -55°C to +150°C and supports automotive-grade assembly.
For engineers reviewing the DDTC124XUA-7 datasheet, DDTC124XUA-7 pinout, DDTC124XUA-7 application, or DDTC124XUA-7 equivalent, key selection criteria include verified input voltage thresholds (VIN(on) = 2.5V @ IOUT = 2mA), guaranteed output current capability (50mA max), thermal resistance (625°C/W), RoHS/Green compliance, and SOT323 footprint compatibility with automated pick-and-place.
Technical Context
This device integrates an NPN transistor with two discrete on-chip biasing resistors (R1 = 22kΩ, R2 = 47kΩ) in a single SOT323 package, eliminating external base-resistor components. Its R1 ≠ R2 architecture enables precise input threshold control and stable switching behavior under varying load conditions.
The transistor exhibits VCE(sat) ≤ 0.3V at IC = 5mA and IB = 0.25mA, fT = 250MHz, and IOUT(off) ≤ 0.5μA at VCC = 50V - confirming suitability for high-speed, low-power logic interface and signal-level switching where leakage and propagation delay matter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50V - supports rail-to-rail operation in 3.3V/5V/12V logic systems without level-shifting. |
| R1 / R2 Values | 22kΩ / 47kΩ - sets defined input threshold (VIN(on) = 2.5V) and ensures reliable turn-on with microcontroller GPIOs. |
| IOUT Max | 50mA - drives small relays, LEDs, or logic inputs directly without external amplification. |
| VOUT(on) | ≤ 0.3V - minimizes power loss and heat generation during conduction in battery-powered devices. |
| PD / RθJA | 200mW / 625°C/W - defines thermal derating limit; requires no heatsink below ~100mW dissipation on FR4 board. |
| Operating Temp | -55°C to +150°C - qualified for under-hood automotive, industrial controls, and extended-temperature IoT nodes. |
Pinout & Package
Package: SOT323 - surface-mount, 3-terminal plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.006g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Transistor emitter terminal | Connected internally to R2; provides low-impedance return path for output current. |
| 2 (Base) | Input node between R1 and R2 | Accepts logic-level input; internal resistor divider sets bias point for predictable switching. |
| 3 (Collector) | Transistor collector terminal | Switches load connected to VCC; sinks up to 50mA with <0.3V saturation drop. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1/R2 bias network | Eliminates two external resistors, reducing BOM count and PCB area in GPIO-driven switches. |
| Low input drive requirement | 0.36mA input current at 5V enables direct drive from ultra-low-power MCUs (e.g., ARM Cortex-M0+). |
| Guaranteed VIN(on) | 2.5V threshold ensures compatibility with 3.3V LVTTL and mixed-voltage logic interfaces. |
| AEC-Q101 readiness | Manufactured in IATF 16949-certified facilities; supports PPAP documentation for automotive qualification. |
| Green / Halogen-free | <900ppm Br, <900ppm Cl, <1000ppm Sb - meets global environmental compliance mandates without performance trade-offs. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving indicator LEDs in space-constrained consumer electronics with 3.3V MCU outputs. IC Role / Device Role / Timing Role: Digital switch that translates weak GPIO signals into full-current LED drive paths. Use Value: Eliminates need for discrete base resistor and reduces layout complexity while maintaining 50mA sink capability and <0.3V dropout. |
Use Scenario: Adding extra digital outputs to resource-limited embedded controllers via parallel port expansion. IC Role / Device Role / Timing Role: Level-shifting buffer and current amplifier for driving optocouplers or small solenoids. Use Value: Enables reliable 50mA switching at 2.5V input threshold, supporting legacy 5V peripherals from modern 3.3V SoCs. |
| Automotive Body Control Module | Industrial Sensor Interface |
|
Use Scenario: Controlling door lock actuators and interior lighting in AEC-Q101-compliant BCM designs. IC Role / Device Role / Timing Role: Robust NPN switch handling intermittent 12V loads with thermal resilience over -40°C to +125°C ambient. Use Value: Delivers 50mA sink current with 625°C/W thermal resistance and IATF 16949 traceability for production release. |
Use Scenario: Isolating and conditioning analog sensor enable lines in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-leakage (≤0.5μA off-state) switch enabling precise power gating of remote sensors. Use Value: Ensures <1μA standby current draw and stable turn-on behavior across wide temperature ranges (-55°C to +150°C). |
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 |
|---|---|---|---|
| DDTC124EUA-7 | R1 = 22kΩ, R2 = 22kΩ (1:1 ratio); higher input current (0.72mA @ 5V), lower VIN(on) (1.4V) | Better suited for low-threshold 1.8V/2.5V logic; less noise immunity due to symmetric biasing | Select when interfacing with sub-3V MCUs or needing faster turn-on at reduced input voltage. |
| NSVD2C22MZ | Same R1/R2 values (22kΩ/47kΩ), but SOT-23 package; higher PD (300mW), RθJA = 450°C/W | Higher power handling and better thermal performance; larger footprint incompatible with ultra-dense layouts | Choose when thermal margin is critical and board space allows SOT-23 instead of SOT323. |
Compared with DDTC124EUA-7, DDTC124XUA-7 offers superior noise immunity and tighter input threshold control due to asymmetric R1/R2; versus NSVD2C22MZ, it trades thermal headroom for 30% smaller footprint and identical biasing precision in space-constrained designs.
Availability
DDTC124XUA-7 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, and automotive body control modules requiring stable component supply, consistent marking (N18), and full RoHS/Green compliance.
Supply support for DDTC124XUA-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, specializing in high-reliability, energy-efficient components for automotive, industrial, and consumer markets.
This part belongs to Diodes' DDTC R1≠R2 series of pre-biased transistors, engineered specifically for simplified digital switching in space- and power-constrained applications where precision biasing and AEC-Q101 readiness are required.
FAQ
What is the maximum continuous collector current for DDTC124XUA-7?
The absolute maximum collector current is 50mA per the datasheet's Absolute Maximum Ratings table. This value is validated under standard test conditions (Tamb = +25°C, VCC = 50V) and must be thermally derated above 25°C using the 625°C/W RθJA value and 200mW power dissipation limit.
Does DDTC124XUA-7 require external base resistors?
No - it integrates R1 = 22kΩ and R2 = 47kΩ internally, forming a complete bias network. The device is designed as a drop-in replacement for discrete transistor + resistor combinations, eliminating layout overhead and component count in digital switching circuits.
Is DDTC124XUA-7 qualified for automotive applications?
While not pre-qualified to AEC-Q101 out-of-box, it is manufactured in IATF 16949-certified facilities and supports PPAP documentation. Customers requiring automotive qualification should contact Diodes Incorporated directly to initiate change-controlled qualification testing per AEC-Q101 standards.
What does the "N18" marking on the SOT323 package indicate?
"N18" is the top-side product type marking code per Diodes' DS30322 specification. It uniquely identifies the DDTC124XUA-7 variant within the R1≠R2 series and is used for traceability and reel identification during automated assembly and quality inspection.
DDTC124XUA-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:
- -
DDTC124XUA-7 FAQ
1.How can I place an order for DDTC124XUA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC124XUA-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 DDTC124XUA-7 reliable?
The price and inventory of DDTC124XUA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC124XUA-7 is usually 5 days.
3.What payment methods are accepted for DDTC124XUA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC124XUA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC124XUA-7?
DDTC124XUA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC124XUA-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 DDTC124XUA-7?
For technical support, including DDTC124XUA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC124XUA-7 requirements.
6.How does Aetrix verify that DDTC124XUA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC124XUA-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 DDTC124XUA-7 meets industry standards.
7.What is the process for return or replacement of DDTC124XUA-7?
All DDTC124XUA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC124XUA-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 DDTC124XUA-7 part is unused and in its original packaging.
Return procedure for DDTC124XUA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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