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

Diodes Incorporated DDTD142JC-7

Name: DDTD142JC-7
Brand: Diodes Incorporated
SKU: DDTD142JC-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTD142JC-7

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: DDTD142JC-7.pdf

Description:: TRANS PREBIAS NPN 50V SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:9,773

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Product details

Overview

DDTD142JC-7 from Diodes Incorporated is an NPN pre-biased digital transistor in SOT23 package, featuring integrated 47kΩ base resistor (R1) and 10kΩ emitter resistor (R2), 500mA I_C, 50V V_CBO, and 0.3V V_CE(sat) at 50mA/2.5mA - used for logic-level switching in automotive body control modules and industrial I/O interfaces.

For engineers reviewing the DDTD142JC-7 datasheet, DDTD142JC-7 pinout, DDTD142JC-7 application, or DDTD142JC-7 equivalent, key selection criteria include guaranteed V_I(ON) ≤ 2.0V at 20mA load, I_L = 13mA input current at 5V drive, and AEC-Q101 qualification readiness for under-hood signal conditioning.

Technical Context

This device integrates biasing resistors to eliminate external components in saturated-switch configurations. It operates as a single-stage inverter with defined V_I(OFF) ≤ 0.3V and V_I(ON) ≥ 2.0V thresholds, enabling direct interfacing with 3.3V/5V microcontroller GPIOs without level-shifting.

The R1–R2 topology provides stable DC biasing across temperature (−55°C to +150°C), with guaranteed h_FE = 100–600 for discrete gain control and f_T = 200MHz for moderate-speed switching up to ~10MHz square-wave operation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	50 V - supports 24V automotive supply rails with 2× safety margin
I_C	500 mA - drives solenoid coils, LED strings, or relay drivers directly
V_CE(sat)	0.3 V @ 50mA/2.5mA - minimizes conduction loss and self-heating in high-duty-cycle apps
R1 / R2	47kΩ / 10kΩ - sets precise base current for predictable turn-on without external resistors
P_D	250 mW - enables operation on standard FR4 PCBs without heatsinking
f_T	200 MHz - supports clean edge transitions in PWM dimming and digital signal routing

Pinout & Package

Package: SOT23 - surface-mount plastic package with matte tin-plated leads, UL 94V-0 rating, 0.008g weight, and J-STD-020 Level 1 moisture sensitivity.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Input node connected to internal R1–R2 divider	Accepts logic-level voltage; internal resistors set I_B automatically
2 (Emitter)	Reference terminal tied to ground via R2	Provides stable emitter bias; enables common-emitter switching with fixed V_BE offset
3 (Collector)	Output switch node	Sinks up to 500mA load current; low V_CE(sat) ensures minimal voltage drop

Key Features

Feature	Design Value
Integrated R1/R2 bias network	Eliminates two external resistors, reducing BOM count and layout area in space-constrained modules
AEC-Q101 readiness	Manufactured in IATF 16949-certified facilities with PPAP capability for automotive-grade traceability
Green compound packaging	Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets global environmental compliance mandates
Thermal derating profile	500°C/W R_θJA on FR4 allows full 250mW power dissipation up to +75°C ambient

Applications

Automotive Body Control

Industrial PLC Output

Use Scenario: Driving door lock actuators and mirror position motors in 12V/24V vehicle systems.

IC Role / Device Role / Timing Role: NPN switch controlling ground-side load current with fast turn-on/off for pulse-width modulated actuation.

Use Value: Guaranteed V_I(ON) ≤ 2.0V ensures reliable activation from MCU GPIOs even under battery voltage sag to 9V.

Use Scenario: Isolating microcontroller outputs from 24V DC field devices in factory automation cabinets.

IC Role / Device Role / Timing Role: Digital buffer stage converting 3.3V logic to 24V-compatible sink output with ESD-hardened terminals.

Use Value: 500mA I_C rating supports direct driving of small relays and indicator LEDs without additional driver stages.

Consumer Appliance UI

Medical Diagnostic Sensor Interface

Use Scenario: Enabling/disabling backlight segments and buzzer drivers in smart home appliances.

IC Role / Device Role / Timing Role: Low-power logic-controlled switch managing intermittent loads with <0.5µA I_O(OFF) leakage.

Use Value: 0.3V V_CE(sat) limits power loss to <15mW per channel, critical for thermally isolated front-panel assemblies.

Use Scenario: Conditioning analog sensor enable signals in portable diagnostic equipment with strict EMC requirements.

IC Role / Device Role / Timing Role: EMI-suppressed switching element with controlled edge rates and low parasitic capacitance (C_ob not specified but typical for SOT23).

Use Value: Matte tin plating and green compound reduce halogen-induced corrosion risk in sterilizable enclosures.

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
DDTB142JC-7-F	Complementary PNP version with matched R1/R2 values and identical thermal specs	Required where high-side switching or inverted logic polarity is needed	Select when sourcing complementary pairs for H-bridge or push-pull output stages
NSV142JCT1G	Same R1/R2 values but rated for 100°C T_J(max) only (vs. 150°C); no AEC-Q101 documentation	Suitable for commercial-grade consumer products but not automotive qualified designs	Choose for cost-sensitive non-automotive applications where extended temperature range is unnecessary

Compared with DDTB142JC-7-F and NSV142JCT1G, DDTD142JC-7 offers full −55°C to +150°C operation and IATF 16949 manufacturing traceability - making it the only option qualified for under-hood automotive use with guaranteed parametric stability over lifetime.

Availability

DDTD142JC-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for DDTD142JC-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.

This part belongs to the DDTD (LO-R1) C series of pre-biased transistors designed specifically for simplified, high-reliability switching in automotive and industrial control systems where board space and assembly cost are constrained.

FAQ

What is the maximum continuous collector current for DDTD142JC-7?

The absolute maximum collector current is 500mA, verified per DS30399 Rev. 9–2 Absolute Maximum Ratings table. Derating begins above +75°C ambient per the published thermal curve, and operation at full current requires adequate PCB copper area per the recommended pad layout.

Does DDTD142JC-7 require external biasing resistors?

No - it integrates a 47kΩ base resistor (R1) and 10kΩ emitter resistor (R2) internally, enabling direct connection between microcontroller GPIO and collector load. This eliminates two external components and improves layout reproducibility in high-volume manufacturing.

Is DDTD142JC-7 qualified for automotive applications?

It is manufactured in IATF 16949-certified facilities and supports PPAP documentation; while not explicitly AEC-Q101 certified in this revision, Diodes states it meets automotive change-control requirements and is intended for automotive applications - qualification status should be confirmed with Diodes' automotive team prior to design-in.

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

V_I(ON) is guaranteed ≥2.0V at I_O = 20mA and V_O = 0.3V, ensuring robust activation from standard 3.3V and 5V logic families. The 0.3V V_I(OFF) threshold further guarantees noise immunity against sub-1V transients on the base line.

DDTD142JC-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

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-23-3

DDTD142JC-7 FAQ

1.How can I place an order for DDTD142JC-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTD142JC-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 DDTD142JC-7 reliable?

The price and inventory of DDTD142JC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTD142JC-7 is usually 5 days.

3.What payment methods are accepted for DDTD142JC-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD142JC-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTD142JC-7?

DDTD142JC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTD142JC-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 DDTD142JC-7?

For technical support, including DDTD142JC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD142JC-7 requirements.

6.How does Aetrix verify that DDTD142JC-7 is sourced from the original manufacturer or authorized distributors?

All DDTD142JC-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 DDTD142JC-7 meets industry standards.

7.What is the process for return or replacement of DDTD142JC-7?

All DDTD142JC-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTD142JC-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 DDTD142JC-7 part is unused and in its original packaging.

Return procedure for DDTD142JC-7:

1.Submit a request within 90 days.

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

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