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

Diodes Incorporated DDTC142TE-7-F

Name: DDTC142TE-7-F
Brand: Diodes Incorporated
SKU: DDTC142TE-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTC142TE-7-F

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: SOT-523

Datasheet:: DDTC142TE-7-F.pdf

Description:: TRANS PREBIAS NPN 50V SOT523

Quantity:: RFQ Add To RFQ list

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Inventory:2,006

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Product details

Overview

DDTC142TE-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package, featuring a 0.47kΩ input bias resistor (R1) and open-emitter configuration (R2 = OPEN), rated for 50V V_CBO, 40V V_CEO, and 5V V_EBO, with h_FE = 100–600 at I_C = 1mA, used in compact logic-level switching and signal conditioning circuits.

For engineers reviewing the DDTC142TE-7-F datasheet, DDTC142TE-7-F pinout, DDTC142TE-7-F application, or DDTC142TE-7-F equivalent, key selection considerations include its single-base-bias topology, AEC-Q101 qualification, 150mW power dissipation limit, SOT523 thermal resistance (625°C/W), and 5V emitter-base breakdown voltage in automotive and industrial control interface designs.

Technical Context

This device integrates a monolithic NPN transistor with an on-die 0.47kΩ base-emitter pull-up resistor (R1) and no second biasing resistor (R2 = OPEN), enabling direct TTL/CMOS-compatible input drive without external components. It operates as a digital switch with guaranteed saturation at I_C/I_B = 5, supporting fast turn-on/turn-off via controlled base current injection.

The SOT523 package provides minimal footprint (1.60 × 1.60 mm) and low thermal mass, requiring FR-4 PCB mounting per JEDEC standards to maintain R_θJA ≤ 625°C/W. Its AEC-Q101 qualification confirms suitability for automotive ambient temperature range (−55°C to +150°C) and reliability under vibration, humidity, and thermal cycling stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	50 V - Maximum collector-base voltage before breakdown; sets upper limit for high-side switching in 3.3V/5V rail systems.
V_CEO	40 V - Collector-emitter sustaining voltage in active switching; supports 24V industrial I/O interfacing with margin.
V_EBO	5 V - Emitter-base reverse breakdown; constrains maximum negative input swing in level-shifting applications.
h_FE	100–600 - DC current gain range at I_C = 1mA, V_CE = 5V; ensures predictable base drive sizing across production lots.
P_D	150 mW - Max continuous power dissipation at T_A = 25°C; requires derating above 25°C per 625°C/W slope.
f_T	200 MHz - Gain-bandwidth product; enables use in low-speed digital switching (<10 MHz) with stable edge response.

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.90 mm), UL 94V-0 rated, matte tin terminals, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal	Connected directly to ground or low-side return path; no internal resistor to base (R2 = OPEN).
2 (Base)	Input control node	Driven through integrated 0.47kΩ resistor (R1); accepts logic-high input to enable conduction.
3 (Collector)	Output current sink	Carries load current to ground when saturated; rated for 100mA max continuous output.

Key Features

Feature	Design Value
Integrated R1 bias resistor	0.47kΩ pull-up enables direct CMOS/TTL drive without external base resistor.
R2 = OPEN configuration	No second bias resistor simplifies design for emitter-grounded switching topologies.
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock.
Halogen- and antimony-free	Meets <900ppm Br, <900ppm Cl, <1000ppm Sb; compliant with global green manufacturing mandates.

Applications

Automotive Door Module Switch Interface

Industrial PLC Digital Input Stage

Use Scenario: Detecting mechanical switch closure in door latch assemblies with 12V battery supply and microcontroller GPIO monitoring.

IC Role / Device Role / Timing Role: NPN pre-biased switch converting floating switch signal to clean logic-low output for MCU interrupt pin.

Use Value: Eliminates need for discrete base resistor and pull-down, reducing BOM count and PCB area in space-constrained modules.

Use Scenario: Isolating 24V field sensor signals into 3.3V/5V logic levels within programmable logic controller input cards.

IC Role / Device Role / Timing Role: Level-shifting digital input buffer with defined V_EBO = 5V limiting reverse input tolerance.

Use Value: Provides robust 40V V_CEO headroom against transients while maintaining fast 200MHz f_T-supported edge integrity.

Consumer Appliance Control Panel

Medical Infusion Pump Status Indicator Driver

Use Scenario: Driving LED status indicators from low-power microcontroller outputs in washing machine control boards.

IC Role / Device Role / Timing Role: Low-current saturated switch (I_C ≤ 20mA) with guaranteed V_CE(SAT) ≤ 0.3V at I_B = 0.25mA.

Use Value: Minimizes voltage drop and power loss in battery-backed or energy-efficient designs.

Use Scenario: Controlling optocoupler input LEDs in safety-critical infusion pump feedback loops.

IC Role / Device Role / Timing Role: Fail-safe digital isolator driver with AEC-Q101 qualification ensuring long-term parametric stability.

Use Value: Supports regulatory compliance (IEC 62304) via documented reliability testing and traceable green material content.

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
DDTC142JE-7-F	Includes both R1 = 0.47kΩ and R2 = 10kΩ resistors; dual-resistor topology enables pull-down functionality.	Suitable for push-pull or actively terminated inputs where base discharge is required.	Select when circuit requires guaranteed turn-off via R2, not just turn-on via R1.
NSV142T1T1G	Same R1 = 0.47kΩ, but R2 = OPEN; identical h_FE range and SOT-523 package; RoHS-compliant but not AEC-Q101 qualified.	Limited to commercial/industrial use; lacks automotive reliability validation and extended temperature support.	Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated.

Compared with DDTC142JE-7-F, DDTC142TE-7-F reduces component count in emitter-grounded switches by omitting R2; versus NSV142T1T1G, it adds AEC-Q101 assurance for automotive deployment without sacrificing electrical performance or footprint.

Availability

DDTC142TE-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input modules, and medical device status indicator circuits requiring stable component supply and long-lifecycle support.

Supply support for DDTC142TE-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 DDTC/DTA pre-biased transistor family, designed specifically for space-constrained digital interface applications requiring simplified biasing, AEC-Q101 reliability, and green material compliance in automotive and industrial control systems.

FAQ

Is DDTC142TE-7-F still in active production?

No - the datasheet explicitly states "OBSOLETE – PART DISCONTINUED" with Rev. 8 dated June 2021. However, Aetrix Electronics maintains legacy inventory and offers last-time-buy support, including full traceability, date-code matching, and extended warranty for ongoing production programs.

What is the function of the OPEN R2 configuration?

The R2 = OPEN designation means no internal resistor connects base to emitter. This allows the device to operate as a simple base-driven switch without automatic turn-off biasing, making it ideal for applications where external control fully manages base voltage and emitter is grounded.

Can DDTC142TE-7-F replace a standard NPN transistor like BC847?

Yes, with design adaptation: its integrated 0.47kΩ R1 eliminates the need for an external base resistor, but the absence of R2 means external pull-down may be required for reliable turn-off in high-noise environments or open-collector configurations.

Does the SOT523 package support automated optical inspection (AOI)?

Yes - the SOT523's standardized pad layout, visible solder joints, and consistent marking (N84) enable reliable AOI detection. Its 0.5mm pitch and 0.22mm lead width meet IPC-A-610 Class 2/3 requirements when using recommended stencil apertures and reflow profiles.

DDTC142TE-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-523

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN - Pre-Biased

Current - Collector (Ic) (Max):: 100 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 @ 1mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 250µA, 5mA

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

Frequency - Transition:: 200 MHz

Power - Max:: 150 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-523

DDTC142TE-7-F FAQ

1.How can I place an order for DDTC142TE-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTC142TE-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 DDTC142TE-7-F reliable?

The price and inventory of DDTC142TE-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 DDTC142TE-7-F is usually 5 days.

3.What payment methods are accepted for DDTC142TE-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC142TE-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTC142TE-7-F?

DDTC142TE-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTC142TE-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 DDTC142TE-7-F?

For technical support, including DDTC142TE-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC142TE-7-F requirements.

6.How does Aetrix verify that DDTC142TE-7-F is sourced from the original manufacturer or authorized distributors?

All DDTC142TE-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 DDTC142TE-7-F meets industry standards.

7.What is the process for return or replacement of DDTC142TE-7-F?

All DDTC142TE-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC142TE-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 DDTC142TE-7-F part is unused and in its original packaging.

Return procedure for DDTC142TE-7-F:

1.Submit a request within 90 days.

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

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