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

Diodes Incorporated DDTD142TC-7-F

Name: DDTD142TC-7-F
Brand: Diodes Incorporated
SKU: DDTD142TC-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTD142TC-7-F

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

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

Datasheet:: DDTD142TC-7-F.pdf

Description:: TRANS PREBIAS NPN 50V SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:987

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Product details

Overview

DDTD142TC-7-F from Diodes Incorporated is an NPN pre-biased digital transistor in SOT23 package, featuring integrated 470Ω base-emitter and 10kΩ base-collector bias resistors, 500mA continuous collector current rating, 50V V_CBO, and 0.3V V_CE(sat) at I_C = 50mA/I_B = 2.5mA - used for logic-level switching in compact DC-DC converter enable circuits.

For engineers reviewing the DDTD142TC-7-F datasheet, DDTD142TC-7-F pinout, DDTD142TC-7-F application, or DDTD142TC-7-F equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, confirmed automotive-grade thermal derating behavior, and real-world use cases in power sequencing and level translation.

Technical Context

This device integrates two precision thin-film resistors (R₁ = 470Ω, R₂ = 10kΩ) directly on-chip to configure a single-NPN digital switch with fixed current gain control. It eliminates external bias components while maintaining stable turn-on/turn-off thresholds across temperature.

Designed for surface-mount logic interfacing, it operates with input voltage range of –5V to +6V (pin 1–2), supports 500mA output current, and achieves 0.3V saturation voltage under 50mA load - enabling low-loss switching in 3.3V/5V microcontroller-driven loads.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40V - maximum safe collector-emitter voltage before breakdown during active switching
I_C (max)	500mA - continuous current handling capacity without thermal shutdown on FR4 PCB
V_CE(sat)	0.3V @ I_C/I_B = 50mA/2.5mA - ensures <15mW conduction loss in high-duty-cycle applications
R₁, R₂	470Ω, 10kΩ - factory-trimmed internal bias network enabling direct MCU GPIO drive without external resistors
P_D	250mW @ T_A = 25°C - power limit defined by 500°C/W junction-to-ambient thermal resistance on standard FR4
f_T	200MHz - usable bandwidth for fast edge-rate digital signals up to ~30MHz toggle frequency

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink node	Connected to ground or low-side return path; referenced for input voltage (pin 1–2)
2 (Base)	Bias control node	Internally connected to R₁ (470Ω) and R₂ (10kΩ); accepts logic-level input
3 (Collector)	Switched output node	Drives load to V_CC; supports 500mA continuous current with 0.3V drop at full load

Key Features

Feature	Design Value
Integrated bias network	Factory-matched R₁ = 470Ω and R₂ = 10kΩ eliminate external resistor placement and tolerance stack-up
Low saturation voltage	V_CE(sat) ≤ 0.3V at 50mA enables <15mW conduction loss in always-on enable circuits
Automotive-ready construction	Manufactured in IATF 16949-certified facilities; supports PPAP documentation upon request
Green compliance	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb); fully RoHS 3 compliant

Applications

Power Sequencing Control

Microcontroller GPIO Expansion

Use Scenario: Enabling downstream DC-DC converters only after primary rail stabilization.

IC Role / Device Role / Timing Role: High-side or low-side enable switch controlled by system supervisor IC.

Use Value: Eliminates need for discrete BJT + two bias resistors; reduces BOM count and layout area by >40%.

Use Scenario: Driving LED indicators or small relays from 3.3V/5V MCU pins with limited sink/source capability.

IC Role / Device Role / Timing Role: Logic-level translator and current amplifier between MCU output and load.

Use Value: Ensures reliable turn-on at 2.5mA base drive; avoids marginal switching due to GPIO current limits.

Level Translation Interface

Load Switching in Portable Devices

Use Scenario: Converting 1.8V logic outputs to drive 5V peripherals in mixed-voltage systems.

IC Role / Device Role / Timing Role: Single-transistor level shifter with built-in pull-up/pull-down biasing.

Use Value: Maintains clean 0.3V low-state and sharp transition edges up to 30MHz toggle rate.

Use Scenario: Managing power to sensors or communication modules in battery-powered IoT nodes.

IC Role / Device Role / Timing Role: Low-quiescent-load switch enabling rapid on/off cycling for energy savings.

Use Value: 0.5µA leakage (I_EBO) preserves battery life during deep sleep modes.

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
DDTD142JC-7-F	Same R₁/R₂ values but rated for V_IN = –5V to +6V (vs. V_EBO = 5V limit in DDTD142TC-7-F)	Supports bidirectional input clamping; preferred where reverse-input transient protection is required	Select when input may be driven negative relative to emitter, e.g., in open-collector bus interfaces
NSVD142DXV6T1G	Identical R₁/R₂ and SOT23 package, but specified for AEC-Q101 qualification and 150°C T_J operation	Qualified for under-hood automotive use; includes PPAP support and extended temperature validation	Choose for production automotive designs requiring formal qualification evidence and higher ambient operating margin

Compared with DDTD142TC-7-F, DDTD142JC-7-F offers broader input voltage tolerance for bidirectional signal paths, while NSVD142DXV6T1G provides certified automotive reliability - both retain identical bias network values and pin compatibility but differ in stress rating scope and qualification status.

Availability

DDTD142TC-7-F is available at Aetrix Electronics and suitable for power sequencing control, microcontroller GPIO expansion, and level translation applications requiring stable component supply and consistent parametric performance across production batches.

Supply support for DDTD142TC-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 series of pre-biased NPN transistors engineered for space-constrained logic interface and power control functions in consumer, industrial, and automotive electronics.

FAQ

Is DDTD142TC-7-F pin-compatible with standard SOT23 NPN transistors?

No - DDTD142TC-7-F uses emitter-base-collector pinout (1-E, 2-B, 3-C), matching generic SOT23 transistor orientation, but its internal bias resistors mean it cannot substitute for bare transistors without circuit redesign. External base drive must connect to pin 2, not pin 1.

What is the maximum operating temperature for continuous use?

The device supports junction temperatures from –55°C to +150°C. At ambient temperatures above 75°C, power dissipation must be derated linearly per Figure 1 in DS30399 Rev. 9–2, reaching zero at 125°C on standard FR4 board.

Does DDTD142TC-7-F meet AEC-Q101 requirements?

DDTD142TC-7-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation, but it is not formally AEC-Q101 qualified. For certified automotive use, Diodes recommends NSVD142DXV6T1G as the qualified alternative.

Can this transistor drive a 100mA solenoid directly?

Yes - with 500mA I_C rating and 0.3V V_CE(sat), it safely switches 100mA loads at 5V with only 30mW conduction loss. Ensure PCB copper area meets recommended pad layout for thermal management per Diodes' SOT23 footprint guidelines.

DDTD142TC-7-F 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:: Obsolete

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):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 5mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 2.5mA, 50mA

Current - Collector Cutoff (Max):: 500nA (ICBO)

Frequency - Transition:: 200 MHz

Power - Max:: 200 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

DDTD142TC-7-F FAQ

1.How can I place an order for DDTD142TC-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTD142TC-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 DDTD142TC-7-F reliable?

The price and inventory of DDTD142TC-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 DDTD142TC-7-F is usually 5 days.

3.What payment methods are accepted for DDTD142TC-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD142TC-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTD142TC-7-F?

DDTD142TC-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTD142TC-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 DDTD142TC-7-F?

For technical support, including DDTD142TC-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD142TC-7-F requirements.

6.How does Aetrix verify that DDTD142TC-7-F is sourced from the original manufacturer or authorized distributors?

All DDTD142TC-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 DDTD142TC-7-F meets industry standards.

7.What is the process for return or replacement of DDTD142TC-7-F?

All DDTD142TC-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTD142TC-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 DDTD142TC-7-F part is unused and in its original packaging.

Return procedure for DDTD142TC-7-F:

1.Submit a request within 90 days.

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

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