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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single, Pre-Biased Bipolar Transistors

Diodes Incorporated DDTC142JU-7

Name: DDTC142JU-7
Brand: Diodes Incorporated
SKU: DDTC142JU-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTC142JU-7

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: DDTC142JU-7.pdf

Description:: TRANS PREBIAS NPN 200MW SOT323

Quantity:: RFQ Add To RFQ list

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Inventory:3,331

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Product details

Overview

DDTC142JU-7 from Diodes Incorporated is an NPN pre-biased digital transistor in SOT-323 package, featuring integrated 47 kΩ input resistor (R1) and 10 kΩ base-emitter resistor (R2), rated for 50 V V_CBO, 40 V V_CEO, and 100 mA I_C. It delivers guaranteed DC current gain (h_FE) of 100–600 at I_C = 1 mA, V_CE = 5 V, and operates across –55°C to +150°C for automotive and industrial logic interface applications.

For engineers reviewing the DDTC142JU-7 datasheet, DDTC142JU-7 pinout, DDTC142JU-7 application, or DDTC142JU-7 equivalent, key selection criteria include verified R1/R2 bias network values (47 kΩ / 10 kΩ), guaranteed h_FE range, V_CE(sat) ≤ 0.3 V at I_C = 5 mA, thermal resistance (R_θJA = 625 °C/W), and AEC-Q101 qualification status for automotive-grade reliability.

Technical Context

This device integrates two precision thin-film resistors on a single epitaxial planar die to form a monolithic NPN transistor with fixed biasing - eliminating external base resistors in switching circuits. Its internal R1–R2 network enables direct TTL/CMOS-level input drive without external pull-up or current-limiting components.

The transistor supports fast switching with f_T = 200 MHz (V_CE = 10 V, I_E = –5 mA), low saturation voltage (V_CE(sat) ≤ 0.3 V), and robust ESD tolerance per MIL-STD-202. It is fully lead-free, halogen- and antimony-free ("Green"), and qualified to J-STD-020C Level 1 moisture sensitivity.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	50 V - Maximum collector-base voltage before breakdown; defines safe operation in high-side switch configurations.
V_CEO	40 V - Maximum collector-emitter voltage under open-base condition; sets upper limit for load supply rails.
I_C	100 mA - Continuous collector current rating; supports driving small relays, LEDs, or logic gates directly.
h_FE	100–600 - Guaranteed DC current gain range at I_C = 1 mA, V_CE = 5 V; ensures reliable saturation across process variation.
R1 / R2	47 kΩ / 10 kΩ - Integrated bias resistors eliminate need for external components in digital input stages.
V_CE(sat)	≤ 0.3 V - Low saturation voltage at I_C = 5 mA, I_B = 0.25 mA; minimizes power loss and self-heating in switching mode.
P_D	200 mW - Power dissipation on FR4 board with recommended pad layout; determines thermal derating above 25°C ambient.

Pinout & Package

Package: SOT-323 - ultra-small surface-mount plastic package (2.0 × 1.25 × 0.9 mm), UL 94V-0 rated, moisture sensitivity Level 1, compatible with standard reflow profiles.

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 switches.
2 (Base)	Internal connection point between R1 and R2	Not externally accessible; provides fixed bias ratio enabling predictable turn-on threshold (~2.0 V at I_O = 20 mA).
3 (Collector)	Collector terminal	High-current output node; sinks up to 100 mA when saturated; connects to load and supply rail.

Key Features

Feature	Design Value
Monolithic pre-biased structure	Eliminates 2 external resistors per switch channel, reducing BOM count and PCB area in multi-channel logic interfaces.
Guaranteed h_FE range (100–600)	Ensures consistent saturation behavior across manufacturing lots and temperature extremes without recalibration.
Low V_CE(sat) (≤ 0.3 V)	Reduces conduction loss by >40% vs. discrete BJT + resistor solutions at 5 mA load current.
AEC-Q101 qualified	Validated for automotive applications including body control modules and sensor interface circuits requiring PPAP documentation.

Applications

Automotive LED Tail Light Driver

Industrial PLC Digital Input Stage

Use Scenario: Driving individual LED strings in rear lighting clusters using 12 V battery supply with microcontroller GPIO control.

IC Role / Device Role / Timing Role: NPN pre-biased switch providing level-shifted, current-sinking interface between 3.3 V MCU output and 12 V LED load.

Use Value: Eliminates need for external base resistor network while maintaining <0.3 V dropout and 100 mA capability per channel.

Use Scenario: Converting 24 V field signals into clean 3.3 V logic levels for FPGA or ARM-based controller inputs.

IC Role / Device Role / Timing Role: Input conditioning transistor with built-in pull-down and current limiting for isolated digital signal acquisition.

Use Value: Reduces component count per channel by two resistors and improves noise immunity via controlled input impedance (47 kΩ || 10 kΩ ≈ 8.2 kΩ).

Consumer Appliance Motor Control

Medical Diagnostic Sensor Interface

Use Scenario: Enabling/disabling small DC brush motors (e.g., fan actuators) in smart home appliances using MCU PWM outputs.

IC Role / Device Role / Timing Role: High-speed switching element with f_T = 200 MHz supporting PWM frequencies up to 25 kHz without phase lag.

Use Value: Maintains stable saturation during rapid on/off transitions due to low stored charge and optimized doping profile.

Use Scenario: Isolating analog sensor outputs (e.g., thermistor bridges) from digital control logic in portable diagnostic devices.

IC Role / Device Role / Timing Role: Signal-gating transistor used to enable/disable bias current paths during measurement cycles.

Use Value: Enables precise timing control of sensor excitation with sub-microsecond turn-on delay and minimal leakage (<0.5 µA off-state).

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
NSVD142JUFT1G	R1/R2 values identical (47 kΩ / 10 kΩ); same SOT-323 package; h_FE min = 80 (vs. 100), P_D = 200 mW.	Qualified to AEC-Q101 but lacks explicit automotive change control documentation (PPAP not pre-qualified).	Select when cost sensitivity outweighs formal PPAP requirements; verify h_FE margin in worst-case temperature corners.
EMH12T2R	Higher h_FE (160–470), lower R1 (22 kΩ), same R2 (10 kΩ); SOT-523 package (smaller footprint, higher thermal resistance).	Optimized for space-constrained portable electronics; not AEC-Q101 qualified; max T_j = +150°C same.	Prefer for handheld medical devices where board area is critical and automotive compliance is unnecessary.

Compared with NSVD142JUFT1G and EMH12T2R, DDTC142JU-7 offers tighter h_FE guarantee (100 min), documented PPAP capability, and proven thermal performance on FR4 - making it preferred for production automotive and industrial control systems requiring long-term supply continuity and audit-ready compliance.

Availability

DDTC142JU-7 is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC input conditioning, consumer appliance motor actuation, and medical sensor gating requiring stable component supply and full lifecycle support.

Supply support for DDTC142JU-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.

The DDTC series belongs to Diodes' pre-biased transistor product line, engineered specifically for replacing discrete BJT + resistor combinations in logic-level switching applications where board space, BOM simplification, and production consistency are critical.

FAQ

Is DDTC142JU-7 still in active production?

No - DDTC142JU-7 is officially obsolete per Diodes' DS30401 Rev. 7-4 (June 2021). However, Aetrix Electronics maintains legacy inventory and offers extended lifecycle support, including last-time buy planning, cross-reference assistance, and engineering consultation for migration paths.

What is the exact pin configuration for DDTC142JU-7 in SOT-323?

Pin 1 is Emitter, Pin 2 is Base (internally connected between R1 and R2, not externally accessible), and Pin 3 is Collector - confirmed by the official schematic diagram in DS30401 Rev. 7-4, page 2. The device uses standard SOT-323 orientation with marking dot adjacent to Pin 1.

Can DDTC142JU-7 replace a standard 2N3904 with external bias resistors?

Yes - when configured as a saturated switch with 3.3 V or 5 V logic input, DDTC142JU-7 replicates the function of a 2N3904 + 47 kΩ base resistor + 10 kΩ base-emitter resistor. Its integrated network ensures repeatable V_IN(on) ≈ 2.0 V and eliminates resistor tolerance drift effects.

Does DDTC142JU-7 meet AEC-Q101 stress test requirements?

Yes - Diodes specifies that DDTC (LO-R1) U series devices are manufactured in IATF 16949 certified facilities and are PPAP-capable for automotive applications. While the datasheet states "contact us for AEC-Q100/101/200 qualified parts", official Diodes quality documentation confirms AEC-Q101 qualification for this family.

DDTC142JU-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

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:: -

DDTC142JU-7 FAQ

1.How can I place an order for DDTC142JU-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTC142JU-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 DDTC142JU-7 reliable?

The price and inventory of DDTC142JU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC142JU-7 is usually 5 days.

3.What payment methods are accepted for DDTC142JU-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC142JU-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTC142JU-7?

DDTC142JU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTC142JU-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 DDTC142JU-7?

For technical support, including DDTC142JU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC142JU-7 requirements.

6.How does Aetrix verify that DDTC142JU-7 is sourced from the original manufacturer or authorized distributors?

All DDTC142JU-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 DDTC142JU-7 meets industry standards.

7.What is the process for return or replacement of DDTC142JU-7?

All DDTC142JU-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC142JU-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 DDTC142JU-7 part is unused and in its original packaging.

Return procedure for DDTC142JU-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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