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Diodes Incorporated DDTD142JU-7-F
- Part No.:
- DDTD142JU-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTD142JU-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,046
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Product details
Overview
DDTD142JU-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT323 package, featuring integrated 0.47kΩ and 10kΩ bias resistors, 50V VCEO, 500mA IC, and 200MHz fT. It functions as a compact, surface-mount digital switch for logic-level interface and load control in space-constrained PCBs.
For engineers reviewing the DDTD142JU-7-F datasheet, DDTD142JU-7-F pinout, DDTD142JU-7-F application, or DDTD142JU-7-F equivalent, key selection criteria include verified R1/R2 resistor values (0.47kΩ/10kΩ), guaranteed VCE(sat) ≤ 0.3V at 50mA/2.5mA, hFE ≥ 100, JEDEC-qualified reliability, and automotive-grade availability via Q-suffix variants.
Technical Context
This device integrates two precision bias resistors (R1 = 0.47kΩ, R2 = 10kΩ) to eliminate external components for base drive, enabling direct connection to 3.3V/5V logic outputs. Its SOT323 footprint supports high-density automated assembly while maintaining thermal resistance of 500°C/W on FR4.
The transistor operates with VCEO = 40V, VCBO = 50V, and BVEBO = 5V, supporting robust switching in low-voltage DC control paths. Gain-bandwidth product of 200MHz ensures stable performance up to audio-frequency switching without oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40V - Maximum collector-emitter voltage before breakdown; enables use in 24V industrial control rails. |
| IC | 500mA - Continuous collector current rating; supports driving relays, LEDs, or small solenoids directly. |
| R1 / R2 | 0.47kΩ / 10kΩ - Integrated base bias network; eliminates two external resistors and reduces layout area by ~1.2mm². |
| VCE(sat) | ≤ 0.3V @ IC/IB = 50mA/2.5mA - Low saturation voltage minimizes power loss and self-heating in switching mode. |
| fT | 200MHz - Gain-bandwidth product confirms suitability for fast digital switching up to ~10MHz square waves. |
| PD | 250mW - Power dissipation limit on standard FR4; defines maximum continuous switching duty cycle at ambient temperature. |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount package (2.15 × 2.10 × 0.95 mm), lead-free, halogen-free, RoHS-compliant, moisture sensitivity level 1.
| 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) | Internal connection point between R1 and R2 | Accessible base node for optional external feedback or pull-down; not intended as primary input in standard use. |
| 3 (Collector) | Collector terminal | Switched output node; connects to load (e.g., LED anode, relay coil) with supply referenced to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1–R2 bias network | 0.47kΩ + 10kΩ configuration enables single-resistor logic-level drive from 3.3V/5V microcontrollers without external components. |
| SOT323 footprint | 2.15 × 2.10 mm outline with 0.65 mm pitch allows placement in < 3.0 mm² board area-critical for wearables and sensor modules. |
| JEDEC-qualified reliability | Qualified to AEC-Q101 stress test standards; validated for high-reliability operation across –55°C to +150°C junction temperature range. |
| Green compound packaging | UL 94V-0 rated molding compound with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb meets automotive and medical environmental compliance requirements. |
Applications
| Industrial Sensor Interface | Automotive Body Control |
|---|---|
|
Use Scenario: Level-shifting and buffering I/O signals from 3.3V MCU GPIOs to 12V/24V sensor inputs in factory automation PLC modules. IC Role / Device Role: Digital switch isolating logic domain from higher-voltage sensing circuitry while providing current gain. Use Value: Eliminates discrete resistor pair and saves 1.2mm² PCB area per channel; VCE(sat) ≤ 0.3V ensures minimal voltage drop during active state. |
Use Scenario: Driving door lock actuators and interior lighting loads in automotive body control modules (BCM). IC Role / Device Role: Low-side load switch controlled by CAN/LIN microcontroller outputs. Use Value: AEC-Q101 qualification and 150°C TJ rating support under-hood deployment; integrated biasing simplifies EMI-sensitive routing. |
| IoT Edge Node Power Control | Consumer Appliance Logic Interface |
|
Use Scenario: Enabling/disabling peripheral sensors (e.g., motion, humidity) in battery-powered smart home hubs to extend standby life. IC Role / Device Role: High-gain, low-leakage switch enabling microamp-level off-state current (IO(off) ≤ 0.5μA). Use Value: 0.5μA leakage at VCC = 50V ensures negligible battery drain over multi-year deployments. |
Use Scenario: Interfacing microcontroller outputs to AC triac gate drivers or buzzer drivers in white goods control boards. IC Role / Device Role: Signal amplifier and isolation buffer between low-power logic and higher-current load circuits. Use Value: 500mA IC rating supports direct drive of 20mA buzzer or 100mA triac gate without additional stage. |
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 |
|---|---|---|---|
| DDTD122LU-7-F | R1 = 0.22kΩ (vs. 0.47kΩ); lower base drive impedance increases input current to 28mA at 5V. | Better suited for faster turn-on in high-speed logic interfaces where reduced propagation delay is critical. | Select when driving 5V TTL-compatible inputs or requiring <100ns tON; avoid if MCU GPIO current budget is limited to <20mA. |
| DDTB142JU-7-F | Complementary PNP version with identical R1/R2 values and matching VCEO/IC ratings. | Required for high-side switching or push-pull output stages where sourcing current is needed. | Use only when circuit topology demands PNP polarity; not interchangeable in common-emitter NPN configurations. |
Compared with DDTD122LU-7-F and DDTB142JU-7-F, DDTD142JU-7-F offers optimal balance of input current (13mA @ 5V), saturation voltage (≤0.3V), and board-area savings-making it preferred for general-purpose 3.3V/5V logic-driven switching where drive strength and efficiency are both prioritized.
Availability
DDTD142JU-7-F is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control, and IoT edge node power control requiring stable component supply and long-term production continuity.
Supply support for DDTD142JU-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to the DDTD (LO-R1) U series of pre-biased transistors designed specifically for reducing component count and PCB area in logic-level switching applications across automotive, industrial, and consumer electronics.
FAQ
What is the function of Pin 2 (Base) in DDTD142JU-7-F?
Pin 2 is the internal node between the 0.47kΩ (R1) and 10kΩ (R2) bias resistors. It is accessible but not intended as the primary input terminal; the device is configured for standard operation with signal applied to Pin 1 (Emitter) and load connected to Pin 3 (Collector). External connection to Pin 2 may alter bias behavior and is not recommended unless explicitly supported by application notes.
Does DDTD142JU-7-F meet AEC-Q101 requirements?
Yes-DDTD142JU-7-F is qualified to JEDEC standards referenced in AEC-Q101, including high-temperature operating life, temperature cycling, and unbiased HAST. While this specific part number is not automotive-grade, its qualification basis enables direct migration to AEC-Q101-compliant Q-suffix variants (e.g., DDTD142JUQ-7-F) manufactured in IATF 16949-certified facilities.
Can DDTD142JU-7-F replace a standard NPN transistor like BC847?
No-it cannot serve as a drop-in replacement for discrete NPN transistors such as BC847 because it includes integrated bias resistors and is optimized for digital switching, not linear amplification. Using it in analog amplifier circuits would result in incorrect biasing and unstable operation due to fixed R1/R2 network loading the base node.
What is the maximum safe operating frequency for PWM switching with DDTD142JU-7-F?
Based on its 200MHz fT and measured switching times (tON/tOFF < 150ns), DDTD142JU-7-F supports reliable PWM operation up to 10MHz in resistive loads. For inductive loads (e.g., relays), practical limits are ~100kHz due to VCE spike suppression requirements and safe operating area constraints at elevated temperatures.
DDTD142JU-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 470 Ohms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 56 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTD142JU-7-F FAQ
1.How can I place an order for DDTD142JU-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTD142JU-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 DDTD142JU-7-F reliable?
The price and inventory of DDTD142JU-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 DDTD142JU-7-F is usually 5 days.
3.What payment methods are accepted for DDTD142JU-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD142JU-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTD142JU-7-F?
DDTD142JU-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTD142JU-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 DDTD142JU-7-F?
For technical support, including DDTD142JU-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD142JU-7-F requirements.
6.How does Aetrix verify that DDTD142JU-7-F is sourced from the original manufacturer or authorized distributors?
All DDTD142JU-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 DDTD142JU-7-F meets industry standards.
7.What is the process for return or replacement of DDTD142JU-7-F?
All DDTD142JU-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTD142JU-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 DDTD142JU-7-F part is unused and in its original packaging.
Return procedure for DDTD142JU-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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