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

Diodes Incorporated DDTC123JUA-7

Name: DDTC123JUA-7
Brand: Diodes Incorporated
SKU: DDTC123JUA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTC123JUA-7

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: DDTC123JUA-7.pdf

Description:: TRANS PREBIAS NPN 200MW SOT323

Quantity:: RFQ Add To RFQ list

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Inventory:3,274

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Product details

Overview

DDTC123JUA-7 from Diodes Incorporated is a 50V NPN pre-biased transistor in SOT323 package with integrated R1=2.2kΩ and R2=47kΩ bias resistors, designed for digital switching applications requiring low input drive current (3.6mA at VIN=5V), low saturation voltage (0.1–0.3V), and DC current gain of 80 at 10mA collector current. It serves as a compact, RoHS-compliant load switch in automotive body control modules.

For engineers reviewing the DDTC123JUA-7 datasheet, DDTC123JUA-7 pinout, DDTC123JUA-7 application, or DDTC123JUA-7 equivalent, key selection criteria include verified input voltage thresholds (V_IN(on) = 1.1V @ I_OUT=5mA), guaranteed output current capability (100mA max), thermal resistance (625°C/W), and AEC-Q101 qualification status for automotive use.

Technical Context

This device integrates an NPN transistor with two discrete on-chip biasing resistors (R1=2.2kΩ, R2=47kΩ) to eliminate external base-drive components. Its internal resistor ratio (R2/R1 ≈ 21.4) enables stable turn-on behavior with predictable input current limiting and reduced sensitivity to V_BE variation across temperature.

The SOT323 package supports automated assembly and delivers 200mW power dissipation at +25°C ambient, with junction-to-ambient thermal resistance of 625°C/W under standard FR4 mounting. Gain-bandwidth product is 250MHz, confirming suitability for moderate-speed digital switching up to ~10MHz edge rates.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50V - Maximum allowable collector-emitter voltage before breakdown; sets safe operating range for 24V automotive supply rails.
I_C(max)	100mA - Continuous collector current limit; defines maximum switched load (e.g., LED strings, small relays).
R1 / R2	2.2kΩ / 47kΩ - Precise on-die bias network enabling fixed-current drive without external resistors.
V_IN(on)	1.1V @ I_OUT=5mA - Validated turn-on threshold; ensures reliable logic-level compatibility with 1.8V/3.3V microcontrollers.
V_CE(sat)	0.1–0.3V - Low saturation voltage reduces power loss and self-heating during conduction.
f_T	250MHz - Small-signal bandwidth; supports fast digital switching with sub-10ns rise/fall times.
P_D	200mW - Absolute maximum power dissipation; constrains continuous duty-cycle operation at full load.

Pinout & Package

Package: SOT323 - ultra-small surface-mount plastic package (2.15mm × 2.10mm × 0.95mm), moisture sensitivity level 1, matte tin-plated leads, UL 94V-0 rated molding compound.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Transistor emitter terminal	Reference node for bias network; connects directly to ground or low-side return path.
2 (Base)	Internal connection point between R1 and R2	Not externally accessible; base node is internally tied to R1–R2 junction for fixed-bias configuration.
3 (Collector)	Transistor collector terminal	High-side switching node; carries full load current when saturated; requires appropriate trace width for 100mA.

Key Features

Feature	Design Value
Integrated bias resistors	Eliminates need for two external SMT resistors, reducing BOM count and PCB area by >2mm².
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22.
Green, halogen-free construction	Meets <900ppm Br/Cl and <1000ppm Sb; compliant with EU RoHS 2015/863/EU and JEDEC J-STD-020 MSL Level 1.
Low input drive requirement	Draws only 3.6mA at 5V input, enabling direct interface with low-power GPIOs without buffer stages.
Stable DC current gain	Guaranteed h_FE ≥ 80 at I_C=10mA, ensuring consistent saturation across production lots and temperature range.

Applications

Automotive Body Control Unit

Industrial Sensor Interface

Use Scenario: Driving LED indicators and small solenoids in door modules and lighting controllers.

IC Role / Device Role / Timing Role: NPN pre-biased switch providing low-side load control with logic-compatible input.

Use Value: Reduces component count vs discrete transistor+resistor solution while maintaining AEC-Q101 compliance.

Use Scenario: Level-shifting and isolation between 3.3V microcontroller outputs and 24V field sensors.

IC Role / Device Role / Timing Role: Digital interface translator enabling safe signal coupling without galvanic isolation.

Use Value: Eliminates need for optocouplers or level-shifters in cost-sensitive industrial I/O modules.

Consumer Appliance Control

Medical Diagnostic Equipment

Use Scenario: Controlling buzzer drivers and display backlight segments in smart home appliances.

IC Role / Device Role / Timing Role: Compact, low-power switching element for intermittent actuation signals.

Use Value: Enables SOT323 footprint replacement of larger SOT23 switches, saving board space in tight enclosures.

Use Scenario: Enabling/disabling analog front-end power rails in portable diagnostic devices.

IC Role / Device Role / Timing Role: Precision-controlled enable switch with defined turn-on threshold and low leakage (<0.5μA off-state).

Use Value: Ensures predictable power sequencing and meets IEC 60601 leakage current limits for patient-connected systems.

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
NSVD123JXV6T1G	R1=2.2kΩ, R2=47kΩ, same SOT323 package, but rated for 60V V_CEO and AEC-Q101 Grade 0 (−40°C to +150°C).	Supports higher-voltage automotive subsystems (e.g., 48V mild-hybrid gate drivers); wider temp range.	Select when extended temperature operation or higher voltage margin is required beyond 50V.
DTC123JMT2L	Same R1/R2 values and electrical specs, but in smaller X2-DFN0603-3 (0.6×0.3mm) package with 150mW P_D.	Targeted at ultra-compact wearables and hearing aids where board space is critical.	Select only if PCB layout allows sub-0.2mm² footprint and thermal derating to 150mW is acceptable.

Compared with NSVD123JXV6T1G and DTC123JMT2L, DDTC123JUA-7 offers optimal balance of 50V rating, 200mW power handling, and proven manufacturability in SOT323-making it ideal for mainstream automotive and industrial control designs where cost, reliability, and process maturity are prioritized over extreme miniaturization or extended voltage range.

Availability

DDTC123JUA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer appliance control, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for DDTC123JUA-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 components for automotive, industrial, and computing markets.

The DDTC series belongs to Diodes' pre-biased transistor product line, engineered specifically for simplified digital switching in space-constrained, high-volume applications where AEC-Q101 compliance and lead-free manufacturing are mandatory.

FAQ

What is the maximum continuous collector current for DDTC123JUA-7?

The absolute maximum continuous collector current is 100mA, as specified in the Absolute Maximum Ratings table. This value assumes operation at +25°C ambient with proper PCB thermal relief; derating is required above +25°C per the 625°C/W thermal resistance curve.

Is DDTC123JUA-7 qualified for automotive applications?

Yes-DDTC123JUA-7 is AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. It meets requirements for temperature cycling, highly accelerated stress testing, and electrostatic discharge robustness required for automotive body electronics and infotainment systems.

Can DDTC123JUA-7 replace a standard NPN transistor with external base resistors?

Yes-it replaces a discrete NPN transistor plus two bias resistors (2.2kΩ and 47kΩ) in a single SOT323 package. The internal resistor network provides identical DC biasing behavior, eliminating layout uncertainty and improving production yield in high-volume assembly.

What is the input voltage threshold for reliable turn-on?

The guaranteed turn-on input voltage is 1.1V at I_OUT=5mA (V_IN(on)), with typical performance extending down to 0.5V. This ensures robust activation from 1.8V and 3.3V logic families even under worst-case temperature and process variations.

DDTC123JUA-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:: -

DDTC123JUA-7 FAQ

1.How can I place an order for DDTC123JUA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTC123JUA-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 DDTC123JUA-7 reliable?

The price and inventory of DDTC123JUA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC123JUA-7 is usually 5 days.

3.What payment methods are accepted for DDTC123JUA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC123JUA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTC123JUA-7?

DDTC123JUA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTC123JUA-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 DDTC123JUA-7?

For technical support, including DDTC123JUA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC123JUA-7 requirements.

6.How does Aetrix verify that DDTC123JUA-7 is sourced from the original manufacturer or authorized distributors?

All DDTC123JUA-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 DDTC123JUA-7 meets industry standards.

7.What is the process for return or replacement of DDTC123JUA-7?

All DDTC123JUA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC123JUA-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 DDTC123JUA-7 part is unused and in its original packaging.

Return procedure for DDTC123JUA-7:

1.Submit a request within 90 days.

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

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