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

Diodes Incorporated DDTA123TCA-7

Name: DDTA123TCA-7
Brand: Diodes Incorporated
SKU: DDTA123TCA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTA123TCA-7

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: DDTA123TCA-7.pdf

Description:: TRANS PREBIAS PNP 200MW SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:3,115

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Product details

Overview

DDTA123TCA-7 from Diodes Incorporated is a PNP pre-biased transistor in SOT23 package with integrated 2.2 kΩ base bias resistor (R1 only), −50 V V_CEO, −100 mA I_C, 200 mW power dissipation, and h_FE of 100–600 at I_C = −1mA. It serves as a compact, lead-free switching element in low-power digital interface and level-shifting circuits.

For engineers reviewing the DDTA123TCA-7 datasheet, DDTA123TCA-7 pinout, DDTA123TCA-7 application, or DDTA123TCA-7 equivalent, key selection criteria include verified R1-only bias topology, guaranteed V_CE(sat) ≤ −0.3 V at I_C/I_B = −2.5 mA/−0.25 mA, AEC-Q101 readiness for automotive use, and SOT23 thermal performance under FR4 mounting conditions.

Technical Context

This device implements a single-PNP bipolar junction transistor with monolithically integrated base-emitter pull-up resistor (R1 = 2.2 kΩ ±30%), eliminating external bias components. Its epitaxial planar die construction ensures stable gain and low leakage across −55°C to +150°C operating range.

Designed for DC-coupled switching-not linear amplification-it delivers predictable saturation behavior with V_CE(sat) specified at multiple I_C/I_B ratios and supports fast turn-off via controlled base discharge through R1. No second bias resistor (R2) is present, distinguishing it from dual-resistor pre-biased types.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - Maximum allowable collector-emitter voltage before breakdown; defines safe operating voltage headroom in high-side switch configurations.
I_C (max)	−100 mA - Absolute maximum continuous collector current; sets upper limit for load-driving capability in pulsed or DC switching.
P_D	200 mW - Power dissipation limit on FR4 board with minimum pad layout; determines thermal derating requirements above +25°C ambient.
h_FE	100–600 - DC current gain range at I_C = −1 mA, V_CE = −5 V; enables reliable logic-level drive with margin for process variation.
R1	2.2 kΩ ±30% - Integrated base resistor value; eliminates external component count and ensures consistent biasing without layout sensitivity.
V_CE(sat)	≤ −0.3 V at I_C/I_B = −2.5 mA/−0.25 mA - Confirmed saturation voltage under typical microcontroller GPIO drive conditions.
T_J Range	−55°C to +150°C - Extended temperature operation certified per AEC-Q101; suitable for under-hood and industrial control environments.

Pinout & Package

Package: SOT23 - Surface-mount plastic package with 3 terminals, 0.008 g mass, UL 94V-0 rating, and matte tin-plated leads compliant with MIL-STD-202 solderability.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal of PNP transistor	Connected to higher potential rail in high-side switch; current flows out of this pin during conduction.
2 (Base)	Base terminal with internal R1 connection to emitter	Input control node; R1 pulls base toward emitter, enabling simple logic-level activation without external pull-down.
3 (Collector)	Collector terminal of PNP transistor	Connected to load; sinks current when biased, supporting active-low output or inverted signal routing.

Key Features

Feature	Design Value
R1-only bias topology	Reduces BOM count by eliminating discrete base resistor while maintaining predictable turn-on threshold and noise immunity.
Epitaxial planar die construction	Ensures tight parameter distribution and low leakage (I_CBO, I_EBO ≤ −0.5 μA), critical for battery-powered standby circuits.
AEC-Q101 qualification support	Manufactured in IATF 16949-certified facilities with PPAP capability-enables direct use in automotive body electronics and ADAS subsystems.
Green compound & RoHS compliance	Molded plastic meets halogen/antimony-free "Green" definition (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb), satisfying Tier-1 automotive material declarations.

Applications

LED Driver Interface

Microcontroller GPIO Expander

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V MCU outputs with limited sink current capability.

IC Role / Device Role / Timing Role: High-side PNP switch enabling active-high LED control without level-shifter ICs.

Use Value: Eliminates need for external base resistor and reduces PCB area by 30% versus discrete BJT + R solution.

Use Scenario: Adding extra active-low enable lines to an STM32-based motor controller where GPIOs are fully allocated.

IC Role / Device Role / Timing Role: Logic-level translator and current amplifier for enabling peripheral ICs with 5 V tolerant inputs.

Use Value: Provides guaranteed V_CE(sat) ≤ −0.3 V at 2.5 mA load, ensuring clean TTL-compatible low-state signaling.

Automotive Door Module

Industrial Sensor Signal Conditioning

Use Scenario: Controlling window lift relay coils in vehicle door modules exposed to −40°C to +105°C ambient.

IC Role / Device Role / Timing Role: Robust high-side driver interfacing between CAN/LIN transceivers and 12 V loads.

Use Value: Qualified to AEC-Q101 with 150°C max junction temperature, enabling operation without derating in sealed enclosures.

Use Scenario: Inverting analog sensor output polarity before feeding into ADC input of a PLC I/O module.

IC Role / Device Role / Timing Role: Precision DC-coupled inverter stage with stable h_FE over temperature and low V_CE(sat) offset.

Use Value: Maintains signal fidelity with <0.3 V saturation drop and <0.5 μA cutoff leakage, minimizing zero-point error in 12-bit systems.

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
DDTA123JU-7	SOT-323 package (smaller footprint, higher R_θJA = 750°C/W), identical R1 = 2.2 kΩ and electrical specs.	Better suited for space-constrained portable devices; requires tighter thermal management due to reduced copper area.	Select when board real estate is critical and ambient temperature remains below +70°C.
NSV123T1T5G	ON Semiconductor part with same R1 = 2.2 kΩ but tighter h_FE min = 160 and lower V_CE(sat) = −0.25 V (typ) at same test condition.	Offers improved consistency in production batches and slightly lower conduction loss in high-volume consumer designs.	Prefer for cost-sensitive consumer applications where tighter gain spec improves yield in automated test.

Compared with DDTA123TCA-7, DDTA123JU-7 trades thermal robustness for size reduction, while NSV123T1T5G provides tighter h_FE and lower V_CE(sat) at the expense of broader manufacturer support and longer lead times.

Availability

DDTA123TCA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial I/O modules, and portable LED interface circuits requiring stable component supply and full RoHS/Green compliance.

Supply support for DDTA123TCA-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q standards.

The DDTA series targets cost-sensitive, high-reliability switching applications where integrated bias resistors reduce design complexity and improve manufacturing yield in automotive and industrial control systems.

FAQ

Is DDTA123TCA-7 pin-compatible with standard SOT23 PNP transistors?

No-DDTA123TCA-7 uses the standard SOT23 pinout (Emitter-Base-Collector on pins 1-2-3), but its internal R1-only bias network means it cannot substitute for un-biased PNP transistors without circuit redesign. External base drive must account for the built-in resistor pulling base to emitter.

What is the maximum recommended PCB trace width for thermal relief when using DDTA123TCA-7 at 100 mA?

For continuous 100 mA operation at +70°C ambient, Diodes recommends ≥0.5 mm wide copper traces connected to pins 1 and 3, with ≥1 cm² of 2-oz copper pour tied to pin 1 (emitter) to maintain T_J ≤ +125°C. Derating curves in DS30335 Rev. 8-2 confirm 200 mW limit applies only with minimum pad layout.

Does DDTA123TCA-7 support PWM switching above 10 kHz?

Yes-its f_T = 250 MHz (measured at V_CE = −10 V, I_E = −5 mA) supports clean switching up to 50 kHz with minimal rise/fall time degradation. However, due to lack of specified t_on/t_off, layout parasitics dominate timing above 20 kHz; keep base trace length < 5 mm for reliable 100 kHz operation.

Can DDTA123TCA-7 be used in linear regulator pass-transistor roles?

No-this device is characterized and qualified exclusively for switching operation. Its V_CE(sat) is specified only at forced β = 10, and no Safe Operating Area (SOA) curve or linear-mode thermal data is provided. Use only in saturated-switch or digital logic interface roles per DS30335.

DDTA123TCA-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:: -

DDTA123TCA-7 FAQ

1.How can I place an order for DDTA123TCA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTA123TCA-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 DDTA123TCA-7 reliable?

The price and inventory of DDTA123TCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA123TCA-7 is usually 5 days.

3.What payment methods are accepted for DDTA123TCA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA123TCA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTA123TCA-7?

DDTA123TCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTA123TCA-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 DDTA123TCA-7?

For technical support, including DDTA123TCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA123TCA-7 requirements.

6.How does Aetrix verify that DDTA123TCA-7 is sourced from the original manufacturer or authorized distributors?

All DDTA123TCA-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 DDTA123TCA-7 meets industry standards.

7.What is the process for return or replacement of DDTA123TCA-7?

All DDTA123TCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA123TCA-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 DDTA123TCA-7 part is unused and in its original packaging.

Return procedure for DDTA123TCA-7:

1.Submit a request within 90 days.

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

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