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

Diodes Incorporated DDTA143TE-7

Name: DDTA143TE-7
Brand: Diodes Incorporated
SKU: DDTA143TE-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTA143TE-7

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: DDTA143TE-7.pdf

Description:: TRANS PREBIAS PNP 150MW SOT523

Quantity:: RFQ Add To RFQ list

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Inventory:4,185

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Product details

Overview

DDTA143TE-7 from Diodes Incorporated is a PNP pre-biased transistor in SOT523 package with built-in 4.7 kΩ base resistor (R1 only), V_CEO = −50 V, I_C = −100 mA peak, V_CE(sat) = −0.3 V at I_C/I_B = −1 mA/−0.1 mA, and h_FE = 100–600. It enables compact, reliable digital switching in space-constrained consumer and industrial control circuits.

For engineers reviewing the DDTA143TE-7 datasheet, DDTA143TE-7 pinout, DDTA143TE-7 application, or DDTA143TE-7 equivalent, key selection criteria include its single-R1 biasing topology, guaranteed saturation performance at low drive current, SOT523 thermal resistance (833 °C/W), and AEC-Q101 readiness for automotive signal conditioning.

Technical Context

This device integrates a PNP bipolar junction transistor with a monolithic 4.7 kΩ base-emitter pull-up resistor (R1), eliminating external bias components. Its R1-only architecture simplifies inverter and level-shifting designs while maintaining precise turn-on thresholds under varying supply conditions.

Designed for DC-coupled digital switching, it operates with guaranteed V_CE(sat) ≤ −0.3 V at I_C/I_B = −1 mA/−0.1 mA and supports f_T = 250 MHz - enabling stable operation up to medium-frequency logic interfacing and LED driver enable control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V: Maximum allowable collector-emitter voltage before breakdown; supports 24 V rail-level switching with safety margin.
I_C (peak)	−100 mA: Peak pulsed collector current capacity; suitable for driving small relays or indicator LEDs directly.
V_CE(sat)	−0.3 V @ I_C/I_B = −1 mA/−0.1 mA: Low saturation voltage ensures minimal power loss and heat generation in always-on control paths.
h_FE	100–600 @ I_C = −1 mA, V_CE = −5 V: Wide DC gain range allows robust switching across process and temperature variation.
R₁	4.7 kΩ ±20%: Integrated base resistor sets precise input threshold; eliminates layout sensitivity and reduces BOM count by one component.
P_D	150 mW @ T_A = +25°C on 15 mm × 15 mm FR4: Power dissipation limit defines maximum continuous switching duty in ambient air without heatsinking.

Pinout & Package

DDTA143TE-7 is housed in a surface-mount SOT523 package (1.60 mm × 1.60 mm × 0.75 mm), optimized for high-density PCB layouts and automated assembly. The package features matte tin-plated leads, complies with J-STD-020 Level 1 moisture sensitivity, and weighs approximately 0.002 g.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink node; connects to system ground or low-side return path in active-low switch configurations.
2 (Base)	B	Control input node tied internally to R1; accepts TTL/CMOS-compatible logic-high signals to activate conduction.
3 (Collector)	C	Output node; delivers switched current to load (e.g., LED anode or microcontroller interrupt line) when biased on.

Key Features

Feature	Design Value
R1-only bias network	Monolithic 4.7 kΩ resistor eliminates external base resistor placement error and improves production yield in high-volume assembly.
SOT523 footprint	0.75 mm height and 1.6 mm × 1.6 mm area enable use in ultra-thin portable devices and wearables where board space is constrained.
V_CE(sat) ≤ −0.3 V	Ensures <100 µW static power loss at 1 mA load, critical for battery-powered systems requiring multi-year standby life.
AEC-Q101 qualified	Validated for automotive signal conditioning applications including body control modules and sensor interface circuitry.
Halogen & antimony free	Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb limits - compliant with global environmental regulations for end-of-life recycling.

Applications

LED Driver Enable Control

Microcontroller GPIO Level Shifter

Use Scenario: Enabling/disabling constant-current LED drivers in smart lighting modules using 3.3 V MCU outputs.

IC Role / Device Role / Timing Role: Active-low switch that pulls driver EN pin to ground when MCU GPIO goes high.

Use Value: Eliminates need for discrete base resistor and saves 0.8 mm² PCB area per channel in multi-LED arrays.

Use Scenario: Translating 1.8 V logic outputs from low-power MCUs to 5 V tolerant inputs on legacy peripherals.

IC Role / Device Role / Timing Role: Inverting level translator with fixed 4.7 kΩ pull-up ensuring clean rise/fall edges up to 10 MHz.

Use Value: Achieves <15 ns propagation delay and <0.3 V output low without external pull-ups or timing compensation.

Automotive Door Lock Actuator Interface

Industrial Sensor Signal Conditioning

Use Scenario: Driving solenoid coil enable lines in vehicle door lock modules with CAN/LIN bus-controlled microcontrollers.

IC Role / Device Role / Timing Role: High-side switch controller that isolates MCU I/O from inductive kickback during actuator deactivation.

Use Value: Withstands −50 V V_CEO and −100 mA I_CM, reducing need for TVS clamping on each actuator line.

Use Scenario: Converting analog sensor fault flags (open-circuit, overtemp) into clean digital interrupts for PLC I/O cards.

IC Role / Device Role / Timing Role: Fault-signal inverter with h_FE ≥ 100 guaranteeing noise-immune switching even at −40°C ambient.

Use Value: Maintains V_CE(sat) ≤ −0.3 V across −55°C to +150°C, ensuring deterministic interrupt assertion timing.

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
DDTA143TK-7	Same die, but in SOT-323 package (2.1 mm × 1.25 mm); R_θJA = 625 °C/W vs. 833 °C/W.	Higher power handling at same current due to lower thermal resistance; requires larger PCB pad area.	Select when thermal margin is critical and board space permits larger footprint.
NSV14301T1G	PNP pre-biased with R₁ = 4.7 kΩ, but includes R₂ (22 kΩ) to emitter; higher input impedance, slower turn-off.	Used in high-noise environments where base-emitter leakage must be minimized; not drop-in for R1-only designs.	Choose only if dual-resistor biasing is required for ESD immunity or noise rejection in sensor front-ends.

Compared with DDTA143TE-7, DDTA143TK-7 offers better thermal performance in less thermally demanding layouts, while NSV14301T1G adds base-emitter shunt resistance - trading off speed and simplicity for enhanced noise immunity in sensitive analog-adjacent circuits.

Availability

DDTA143TE-7 is available at Aetrix Electronics and suitable for LED driver enable control, microcontroller GPIO level shifting, and automotive door lock actuator interface requiring stable component supply and long-term manufacturability.

Supply support for DDTA143TE-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.

The DDTA series targets cost-sensitive, space-constrained digital switching applications - delivering integrated biasing, automotive qualification, and green compliance in miniature packages for consumer, industrial, and automotive electronics.

FAQ

What is the maximum continuous collector current for DDTA143TE-7?

The absolute maximum continuous collector current is −50 mA at T_A = +25°C, derated linearly to zero at +150°C based on the 150 mW power limit and 833 °C/W thermal resistance. Pulse operation supports −100 mA for ≤300 µs with ≤2% duty cycle, per datasheet Note 6.

Can DDTA143TE-7 replace a standard PNP transistor with an external base resistor?

Yes - it replaces a discrete PNP BJT plus 4.7 kΩ base resistor in single-R1 configurations. Pin compatibility requires matching SOT523 pinout (E-B-C), and design validation must confirm V_CE(sat) and switching speed meet system requirements, as internal R1 fixes bias point.

Is DDTA143TE-7 suitable for automotive applications?

Yes - it is AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. Diodes specifies PPAP capability and change control for automotive use; full qualification documentation is available upon request for body electronics and chassis subsystems.

What is the meaning of the "-7" suffix in DDTA143TE-7?

The "-7" denotes tape-and-reel packaging: 3000 units per 7-inch reel with 8 mm tape width, per Diodes' standard ordering convention. It does not indicate revision level or RoHS status - all DDTA parts are fully RoHS 3 and halogen-free per Notes 1–3 in DS30319 Rev. 9-2.

DDTA143TE-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:: -

DDTA143TE-7 FAQ

1.How can I place an order for DDTA143TE-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTA143TE-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 DDTA143TE-7 reliable?

The price and inventory of DDTA143TE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA143TE-7 is usually 5 days.

3.What payment methods are accepted for DDTA143TE-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA143TE-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTA143TE-7?

DDTA143TE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTA143TE-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 DDTA143TE-7?

For technical support, including DDTA143TE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA143TE-7 requirements.

6.How does Aetrix verify that DDTA143TE-7 is sourced from the original manufacturer or authorized distributors?

All DDTA143TE-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 DDTA143TE-7 meets industry standards.

7.What is the process for return or replacement of DDTA143TE-7?

All DDTA143TE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA143TE-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 DDTA143TE-7 part is unused and in its original packaging.

Return procedure for DDTA143TE-7:

1.Submit a request within 90 days.

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

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