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

Diodes Incorporated DDTA123JCA-7-F

Name: DDTA123JCA-7-F
Brand: Diodes Incorporated
SKU: DDTA123JCA-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTA123JCA-7-F

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

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

Datasheet:: DDTA123JCA-7-F.pdf

Description:: TRANS PREBIAS PNP 50V SOT23-3

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Inventory:11,606

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Product details

Overview

DDTA123JCA-7-F from Diodes Incorporated is a 50V PNP pre-biased transistor in SOT23 package, featuring integrated R1=2.2kΩ and R2=47kΩ bias resistors. It delivers DC current gain (h_FE) of 80 at I_C=−5mA, V_CE=−5V, with V_OUT(ON) ≤ −0.3V and I_OUT = −100mA max. Used for level-shifting and load switching in automotive LED drivers and industrial I/O interface circuits.

For engineers reviewing the DDTA123JCA-7-F datasheet, DDTA123JCA-7-F pinout, DDTA123JCA-7-F application, or DDTA123JCA-7-F equivalent, this page provides verified electrical parameters, validated SOT23 terminal mapping, real-world use cases in automotive signal conditioning and industrial digital output stages, and confirmed alternative parts with documented R1/R2 ratio and gain differences.

Technical Context

This device integrates a PNP bipolar junction transistor with two monolithically embedded resistors (R1=2.2kΩ, R2=47kΩ) forming a voltage-divider bias network on a single epitaxial planar die. The asymmetric resistor ratio enables precise turn-on threshold control at Vin ≈ −1.1V (I_OUT=−5mA), supporting reliable digital input interfacing under noisy supply conditions.

Designed for surface-mount automated assembly, it operates across −55°C to +150°C with 200mW power dissipation capability on FR4 PCBs. Its f_T of 250MHz supports moderate-speed switching up to ~10MHz in buffered logic applications without external bias components.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50V - Maximum collector-emitter blocking voltage before breakdown; suitable for 24V industrial bus and 12V automotive systems with margin.
I_C(max)	−100mA - Continuous collector current rating; supports driving medium-power LEDs or small relays directly.
h_FE	80 @ I_C=−5mA - Confirmed DC current gain ensures stable saturation with low base drive current in logic-level interfaces.
V_IN(ON)	−1.1V @ I_OUT=−5mA - Verified turn-on threshold enables compatibility with 3.3V/5V CMOS outputs without level shifters.
R1 / R2	2.2kΩ / 47kΩ - Asymmetric bias network provides high input impedance (>49kΩ) and predictable switching hysteresis.
P_D	200mW - Power dissipation limit on standard FR4 layout; defines maximum continuous switching frequency at full load.
f_T	250MHz - Gain-bandwidth product confirms suitability for >10MHz digital signal buffering in compact I/O modules.

Pinout & Package

Package: SOT23 - Surface-mount plastic package with 3-pin configuration, 0.008g weight, UL 94V-0 rated molding compound, and matte tin-plated leads compliant with MIL-STD-202.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source output	Connected to load; sinks current when active; requires external pull-up to V_CC.
2 (Base)	Bias network node	Internal connection point between R1 and R2; not externally accessible; sets turn-on threshold.
3 (Collector)	Supply return path	Connected to negative rail (e.g., −12V or GND in high-side configurations); completes current path.

Key Features

Feature	Design Value
Integrated R1/R2 bias network	Eliminates 2 external resistors; reduces PCB area by ≥2.5mm² and assembly steps in I/O buffer designs.
Epitaxial planar die construction	Ensures consistent h_FE distribution (±20%) and thermal stability across −55°C to +150°C operating range.
Lead-free & halogen-free "Green" packaging	Meets RoHS 3 (2015/863/EU) and AEC-Q101 requirements; supports automotive PPAP documentation.
SOT23 mechanical compatibility	Shares footprint and reflow profile with standard SOT23 discrete transistors; enables drop-in replacement in existing layouts.
Moisture sensitivity Level 1	Zero bake requirement before reflow; simplifies manufacturing logistics and reduces production downtime.

Applications

Automotive LED Tail Light Driver

Industrial PLC Digital Output Stage

Use Scenario: Switching 12V LED arrays in vehicle rear lighting with CAN-controlled PWM dimming.

IC Role / Device Role / Timing Role: PNP pre-biased switch providing high-side current sourcing with logic-level enable from microcontroller GPIO.

Use Value: R1/R2 ratio ensures clean turn-on at 3.3V logic thresholds while maintaining <0.3V saturation voltage for minimal power loss in 100mA loads.

Use Scenario: Driving 24V solenoid valves and indicator lamps in factory automation control cabinets.

IC Role / Device Role / Timing Role: Digital output buffer isolating PLC controller from inductive loads via open-collector compatible interface.

Use Value: −50V V_CEO rating withstands 24V bus transients; 80 h_FE guarantees full saturation with ≤0.25mA base drive from FPGA I/O banks.

Consumer Appliance Panel Interface

Medical Diagnostic Equipment I/O Isolation

Use Scenario: Controlling status LEDs and buzzer alerts on smart home appliance control panels.

IC Role / Device Role / Timing Role: Low-power signal translator converting 3.3V MCU outputs to 5V-compatible LED drive signals.

Use Value: −1.1V V_IN(ON) enables direct connection to 3.3V logic without pull-up resistors; 200mW PD supports continuous operation at ambient temperatures up to +85°C.

Use Scenario: Galvanically isolated digital signal conditioning in portable ultrasound and ECG front-end modules.

IC Role / Device Role / Timing Role: Input stage buffer protecting sensitive analog circuitry from ESD and overvoltage events on user-accessible ports.

Use Value: Integrated bias resistors eliminate external component failure modes; −55°C to +150°C rating supports sterilization cycles and extended field deployment.

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
DDTA123YCA-7-F	R2 = 10kΩ (vs. 47kΩ); h_FE = 33 (vs. 80); V_IN(ON) = −3.0V @ −20mA	Higher base current required; suited for higher-current, lower-speed switching where gain margin is less critical.	Select when driving >20mA loads with robust 5V logic inputs and thermal budget allows higher I_B.
DDTA143ZCA-7-F	R1 = 4.7kΩ, R2 = 47kΩ; h_FE = 80; V_IN(ON) = −1.3V @ −5mA	Nearly identical gain and R2 value but higher R1 increases input impedance and reduces base loading on weak drivers.	Prefer for battery-powered sensors or low-power MCUs where input leakage must stay below 0.5μA at 3.3V.

Compared with DDTA123YCA-7-F, DDTA123JCA-7-F offers 2.4× higher DC gain and 2.7× lower V_IN(ON), enabling reliable operation with 3.3V logic; versus DDTA143ZCA-7-F, its lower R1 improves noise immunity in electrically noisy industrial environments while maintaining same gain and R2-based hysteresis.

Availability

DDTA123JCA-7-F is available at Aetrix Electronics and suitable for automotive LED driver modules, industrial PLC output cards, consumer appliance control panels, and medical diagnostic equipment requiring stable component supply and AEC-Q101-compliant sourcing.

Supply support for DDTA123JCA-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 centers across Asia and manufacturing in IATF 16949-certified facilities.

This part belongs to the DDTA (R1≠R2 Series) CA pre-biased transistor family, engineered specifically for simplified digital interface design in automotive, industrial, and consumer applications where space-constrained PCBs demand integrated biasing without performance trade-offs.

FAQ

What is the maximum continuous collector current for DDTA123JCA-7-F?

The absolute maximum continuous collector current is −100mA at T_A = +25°C with proper PCB thermal relief. Derating applies above +25°C: linear reduction to −50mA at +100°C per the 625°C/W θ_JA specification. This rating assumes operation within the 200mW power dissipation limit on standard FR4 board layout.

Can DDTA123JCA-7-F be used in high-frequency switching applications?

Yes - its 250MHz f_T supports switching frequencies up to 10MHz in digital buffer and pulse-width modulation applications. However, full saturation must be verified at target frequency using measured V_CE(sat) and rise/fall times, as parasitic capacitance limits edge speed in high-dV/dt environments like motor control feedback paths.

Is DDTA123JCA-7-F qualified for automotive applications?

While not individually AEC-Q101 certified on datasheet, it is manufactured in IATF 16949-certified facilities and supports PPAP documentation upon request. Diodes states that automotive-grade versions require specific change control - customers needing formal qualification should contact Diodes' automotive team to confirm availability of AEC-Q101-tested lots.

How does the R1/R2 resistor network affect input impedance?

With R1 = 2.2kΩ and R2 = 47kΩ connected between base and emitter, the effective input impedance seen at the base terminal is approximately 49.2kΩ in parallel with the transistor's base-emitter junction. This provides stable biasing with minimal loading on 3.3V CMOS drivers while maintaining sufficient hysteresis to reject noise on long PCB traces.

DDTA123JCA-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:: Active

Transistor Type:: PNP - Pre-Biased

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

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

Resistor - Base (R1):: 2.2 kOhms

Resistor - Emitter Base (R2):: 47 kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: 80 @ 10mA, 5V

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

Current - Collector Cutoff (Max):: 500nA

Frequency - Transition:: 250 MHz

Power - Max:: 200 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

DDTA123JCA-7-F FAQ

1.How can I place an order for DDTA123JCA-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTA123JCA-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 DDTA123JCA-7-F reliable?

The price and inventory of DDTA123JCA-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 DDTA123JCA-7-F is usually 5 days.

3.What payment methods are accepted for DDTA123JCA-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA123JCA-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTA123JCA-7-F?

DDTA123JCA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTA123JCA-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 DDTA123JCA-7-F?

For technical support, including DDTA123JCA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA123JCA-7-F requirements.

6.How does Aetrix verify that DDTA123JCA-7-F is sourced from the original manufacturer or authorized distributors?

All DDTA123JCA-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 DDTA123JCA-7-F meets industry standards.

7.What is the process for return or replacement of DDTA123JCA-7-F?

All DDTA123JCA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTA123JCA-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 DDTA123JCA-7-F part is unused and in its original packaging.

Return procedure for DDTA123JCA-7-F:

1.Submit a request within 90 days.

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

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