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

Diodes Incorporated DDTA114TKA-7-F

Name: DDTA114TKA-7-F
Brand: Diodes Incorporated
SKU: DDTA114TKA-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTA114TKA-7-F

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

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

Datasheet:: DDTA114TKA-7-F.pdf

Description:: TRANS PREBIAS PNP 50V SC59-3

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Product details

Overview

DDTA114TKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor with built-in 10 kΩ bias resistor (R1 only), SC-59 package, −50 V V_CEO, −100 mA I_C, and h_FE of 100–600 at −1 mA/−5 V; used in discrete logic-level switching and signal inversion circuits in consumer power management modules.

For engineers reviewing the DDTA114TKA-7-F datasheet, DDTA114TKA-7-F pinout, DDTA114TKA-7-F application, or DDTA114TKA-7-F equivalent, this page delivers verified electrical specs, terminal roles, thermal derating behavior, R1 tolerance (±30%), and real-world use context for high-volume SMT logic interface design.

Technical Context

This device integrates a single PNP bipolar junction transistor with one external-base biasing resistor (R1 = 10 kΩ nominal) to simplify circuit design and reduce component count in digital switching applications. It operates with guaranteed V_CEO = −50 V and V_EBO = −5 V, supporting rail-to-rail input compatibility in 3.3 V and 5 V logic systems.

The transistor exhibits h_FE = 100–600 at I_C = −1 mA and V_CE = −5 V, and V_CE(sat) ≤ −0.3 V at I_C/I_B = −5 mA/−0.5 mA, enabling low-loss active-low switching in IO buffer and level-shifting stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - Supports safe operation across 24 V industrial logic rails and automotive 12 V systems without breakdown.
I_C (max)	−100 mA - Handles moderate load switching such as LED drivers, relay coils, and MOSFET gate control.
R1 (bias)	10 kΩ ±30% - Enables direct connection to microcontroller GPIOs without external base resistors; reduces BOM count.
V_CE(sat)	≤ −0.3 V at −5 mA/−0.5 mA - Minimizes conduction loss and self-heating in continuous-duty switching nodes.
h_FE	100–600 at −1 mA/−5 V - Ensures reliable saturation across process and temperature variation in production environments.
P_D	200 mW - Compatible with standard FR4 PCB layouts using Diodes' recommended pad pattern (AP02001).
f_T	250 MHz - Sufficient for <10 MHz digital signal routing and pulse-width modulation (PWM) control paths.

Pinout & Package

Package: SC-59 (SOT-23 variant), surface-mount, lead-free/RoHS-compliant, UL 94V-0 molding compound, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal	Connected to higher potential rail (e.g., V_CC) in common-emitter switch configuration.
2 (Base)	Base node with internal R1	Input node tied to controller output; R1 pulls base toward emitter to ensure turn-off when input floats or goes high.
3 (Collector)	Collector terminal	Output node connected to load (e.g., LED cathode or N-channel MOSFET gate); sinks current when active.

Key Features

Feature	Design Value
Integrated R1 bias resistor	10 kΩ ±30% - Eliminates need for external base resistor, reducing layout area and assembly steps.
SC-59 package footprint	Compatible with SOT-23 pick-and-place equipment and reflow profiles; 0.008 g mass supports lightweight portable designs.
Green molding compound	Halogen-free, Sb₂O₃-free material per Diodes' policy (Date Code 0627+), meeting IPC-J-STD-609A Class 1 requirements.
Guaranteed V_CE(sat)	≤ −0.3 V at I_C/I_B = −5 mA/−0.5 mA - Ensures predictable voltage drop and minimal power dissipation in saturated mode.

Applications

Smartphone Power Sequencing

USB-C Port Protection Logic

Use Scenario: Controlling enable signals for PMIC rails during cold-boot and reset sequencing.

IC Role / Device Role / Timing Role: PNP pre-biased switch acting as active-low enable gate between SoC GPIO and PMIC EN pin.

Use Value: Eliminates external resistor network while maintaining tight V_CE(sat) control (<−0.3 V) to avoid false enable due to voltage droop.

Use Scenario: Isolating CC line detection logic from V_CONN power domain during plug insertion.

IC Role / Device Role / Timing Role: Level-shifting switch translating 1.8 V USB PD controller output to 5 V CC line pull-up path.

Use Value: Leverages −50 V V_CEO rating to withstand transient coupling from V_CONN, ensuring robust hot-plug detection.

Industrial Sensor Interface

White Goods Control Panel

Use Scenario: Driving optocoupler inputs in isolated analog sensor signal conditioning blocks.

IC Role / Device Role / Timing Role: Current-sinking driver for PC817-type optocoupler LED anode, referenced to 3.3 V supply.

Use Value: Delivers stable −5 mA collector current with h_FE ≥100 across −40°C to +85°C, ensuring consistent CTR margin.

Use Scenario: Enabling/disabling backlight LEDs on refrigerator display panels via MCU GPIO.

IC Role / Device Role / Timing Role: Low-side sink switch controlling parallel LED strings (20 mA total) from 5 V rail.

Use Value: Uses integrated R1 to guarantee turn-off during MCU reset, preventing unintended backlight activation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP pre-biased transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DDTA114YKA-7-F	Same R1 = 10 kΩ, but h_FE binned to 200–400 (Y-grade) vs. 100–600 (T-grade).	Preferred where tighter h_FE distribution improves consistency in production calibration routines.	Select Y-grade for test fixtures requiring repeatable I_C response; T-grade offers broader gain coverage for cost-sensitive volume builds.
NSVDDTA114TXZT2G	ON Semiconductor variant with identical R1, V_CEO, and SC-59 package, but f_T rated at 200 MHz (vs. 250 MHz).	Suitable for sub-5 MHz switching; not recommended for PWM dimming above 10 kHz due to reduced bandwidth.	Use when cross-manufacturer second sourcing is required and system clock rates remain below 5 MHz.

Compared with DDTA114YKA-7-F, the T-grade offers wider h_FE tolerance for general-purpose use, while NSVDDTA114TXZT2G trades 50 MHz f_T headroom for multi-source flexibility-both retain identical R1 and thermal performance.

Availability

DDTA114TKA-7-F is available at Aetrix Electronics and suitable for smartphone power sequencing, USB-C port protection logic, and industrial sensor interface applications requiring stable component supply and RoHS-compliant SMT transistors.

Supply support for DDTA114TKA-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, serving automotive, industrial, computing, and consumer markets since 1960.

This part belongs to the DDTA R1-only pre-biased transistor series, designed specifically to replace dual-component (transistor + resistor) solutions in space-constrained digital interface and power control circuits.

FAQ

What is the function of the internal R1 resistor in DDTA114TKA-7-F?

The internal R1 resistor (10 kΩ ±30%) connects the base to the emitter, providing automatic turn-off bias when the input signal is high-impedance or pulled high. This eliminates the need for an external base resistor in common-emitter switching configurations, simplifying PCB layout and improving reliability in GPIO-driven applications.

Can DDTA114TKA-7-F be used in linear amplification mode?

No-it is characterized and qualified exclusively for switching operation. Its h_FE range, V_CE(sat), and thermal derating curve are specified under digital drive conditions (I_C/I_B ratios of −5 mA/−0.5 mA). Linear region parameters like output conductance or distortion are not characterized or guaranteed.

Is DDTA114TKA-7-F compatible with lead-free reflow profiles?

Yes. It uses matte tin-plated copper leadframe and green molding compound compliant with J-STD-020C Level 1 moisture sensitivity. The device supports peak reflow temperatures up to 260°C and is qualified for standard Pb-free soldering processes per IPC/JEDEC J-STD-020.

How does the SC-59 package differ from standard SOT-23?

SC-59 is a Diodes-specific designation for a variant of SOT-23 with identical pinout (E-B-C) and mechanical dimensions (3.0 × 1.7 × 1.3 mm), but optimized leadframe geometry and mold compound formulation for enhanced thermal resistance (R_θJA = 625°C/W on FR4) and RoHS compliance.

DDTA114TKA-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:: PNP - Pre-Biased

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 50 V

Resistor - Base (R1):: 10 kOhms

Resistor - Emitter Base (R2):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 1mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 100µA, 1mA

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

Frequency - Transition:: 250 MHz

Power - Max:: 200 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-59-3

DDTA114TKA-7-F FAQ

1.How can I place an order for DDTA114TKA-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTA114TKA-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 DDTA114TKA-7-F reliable?

The price and inventory of DDTA114TKA-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 DDTA114TKA-7-F is usually 5 days.

3.What payment methods are accepted for DDTA114TKA-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA114TKA-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTA114TKA-7-F?

DDTA114TKA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTA114TKA-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 DDTA114TKA-7-F?

For technical support, including DDTA114TKA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA114TKA-7-F requirements.

6.How does Aetrix verify that DDTA114TKA-7-F is sourced from the original manufacturer or authorized distributors?

All DDTA114TKA-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 DDTA114TKA-7-F meets industry standards.

7.What is the process for return or replacement of DDTA114TKA-7-F?

All DDTA114TKA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTA114TKA-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 DDTA114TKA-7-F part is unused and in its original packaging.

Return procedure for DDTA114TKA-7-F:

1.Submit a request within 90 days.

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

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