Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated DDTB123EC-7-F

Name: DDTB123EC-7-F
Brand: Diodes Incorporated
SKU: DDTB123EC-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: DDTB123EC-7-F

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

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

Datasheet:: DDTB123EC-7-F.pdf

Description:: TRANS PREBIAS PNP 50V SOT23-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,924

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

DDTB123EC-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT23 package, featuring integrated 2.2kΩ base-emitter and base-collector bias resistors. It delivers −500mA output current, −0.3V saturation voltage at −50mA/−2.5mA drive, and DC current gain (G_I) of 39 typical, suited for discrete logic-level switching in automotive body control modules.

For engineers reviewing the DDTB123EC-7-F datasheet, DDTB123EC-7-F pinout, DDTB123EC-7-F application, or DDTB123EC-7-F equivalent, key selection criteria include verified V_CEO = −40V, R₁/R₂ = 2.2kΩ/2.2kΩ matching, SOT23 thermal resistance (625°C/W), and AEC-Q101 qualification status for under-hood signal conditioning.

Technical Context

This device integrates two precision-matched 2.2kΩ resistors to configure a fixed-current bias network, eliminating external components for PNP switching. Its −40V V_CEO, −50V V_CBO, and −0.3V V_CE(sat) at −50mA support robust operation in 12V/24V automotive supply rails with minimal conduction loss.

The transistor exhibits G_I = 39 (typ) at −50mA collector current and f_T = 200MHz, enabling reliable performance in medium-speed digital interface buffering and LED driver sink stages where predictable turn-on threshold (V_IN(on) = −3.0V) is required.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40V - Withstands 24V system transients plus margin without breakdown
R₁, R₂	2.2kΩ each - Sets fixed base current for consistent turn-on at −3.0V input
V_CE(sat)	−0.3V @ −50mA/−2.5mA - Minimizes power dissipation in high-duty-cycle switching
G_I	39 (typ) - Predictable current amplification for stable logic-level interfacing
P_D	200mW - Limits thermal rise on FR4 PCB with standard pad layout
f_T	200MHz - Supports signal integrity up to ~20MHz digital edge rates

Pinout & Package

Package: SOT23 - Surface-mount plastic package (2.4mm × 1.3mm × 1.0mm), lead-free, halogen-free, moisture sensitivity level 1, weight 0.008g.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal	Connected to positive rail in high-side switch configuration
2 (Base)	Bias node	Internally tied to both 2.2kΩ resistors; accepts logic-level control input
3 (Collector)	Current sink terminal	Drives load to ground; rated for −500mA continuous current

Key Features

Feature	Design Value
Integrated bias network	Matched 2.2kΩ R₁/R₂ eliminates external resistor placement and tolerance stack-up
SOT23 footprint	Enables automated pick-and-place assembly and board space savings vs. discrete BJT + resistors
AEC-Q101 qualified	Validated for automotive applications including body electronics and lighting control
Green compound	UL 94V-0 rated, <900ppm Br/Cl, <1000ppm Sb - meets global environmental compliance mandates

Applications

Automotive Door Module

Industrial PLC Output Stage

Use Scenario: Driving window lift motor enable signals and mirror fold/unfold relays in 12V vehicle platforms.

IC Role / Device Role / Timing Role: PNP pre-biased switch providing high-side control of 50–200mA loads with logic-compatible input.

Use Value: Eliminates need for dual external resistors while maintaining −40V V_CEO margin against load dump events.

Use Scenario: Isolating microcontroller GPIOs from 24V solenoid and indicator lamp drivers in factory automation I/O modules.

IC Role / Device Role / Timing Role: Discrete-level interface buffer with −0.3V V_CE(sat) ensuring minimal voltage drop at full load.

Use Value: Reduces BOM count and PCB area versus discrete BJT + biasing network, improving manufacturing yield.

LED Tail Light Driver

USB-C Port Power Switch

Use Scenario: Sink-switching red/amber LED strings in rear combination lamps with PWM dimming.

IC Role / Device Role / Timing Role: Current-controlled switch operating at 100Hz–1kHz PWM frequencies with 200MHz f_T headroom.

Use Value: Stable G_I = 39 ensures consistent LED current across temperature and unit-to-unit variation.

Use Scenario: Enabling/disabling V_BUS power path in USB-C receptacle circuits requiring reverse-polarity protection.

IC Role / Device Role / Timing Role: High-side PNP switch controlling 5V/3A power delivery with fast turn-off via base discharge path.

Use Value: Integrated R₂ provides controlled base pull-down for clean turn-off, reducing shoot-through risk.

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
DDTB123YC-7-F	R₁ = 2.2kΩ, R₂ = 10kΩ - higher R₂ reduces base current, lowering G_I to 36 typ	Better suited for low-power logic interfaces where reduced drive strength minimizes EMI	Select when lower base current consumption is prioritized over maximum output current capability
DDTB113EC-7-F	R₁/R₂ = 1kΩ/1kΩ - delivers higher base current, increasing G_I to 33 typ but raising power dissipation	Preferred for faster switching in high-frequency PWM applications due to lower R₁ impedance	Choose when faster turn-on response is needed and thermal budget allows higher base power

Compared with DDTB123YC-7-F and DDTB113EC-7-F, DDTB123EC-7-F offers balanced biasing (2.2kΩ/2.2kΩ) for optimal trade-off between switching speed, saturation voltage, and thermal efficiency in general-purpose automotive and industrial switching.

Availability

DDTB123EC-7-F is available at Aetrix Electronics and suitable for automotive body control units, industrial programmable logic controller outputs, and LED lighting systems requiring stable component supply and long-term lifecycle support.

Supply support for DDTB123EC-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.

The DDTB series targets cost-sensitive, space-constrained applications requiring simplified PNP switching - specifically engineered for automotive interior electronics, industrial I/O, and consumer appliance control where reliability and RoHS compliance are mandatory.

FAQ

Is DDTB123EC-7-F qualified for automotive use?

Yes, DDTB123EC-7-F is AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. It meets PPAP requirements and supports change control protocols for automotive applications, including body electronics and lighting control modules.

What is the maximum continuous collector current rating?

The absolute maximum continuous collector current is −500mA at T_A = +25°C with proper PCB thermal relief. Derating applies above +25°C per the 625°C/W R_θJA value; at +85°C ambient, max usable current drops to approximately −300mA.

Can DDTB123EC-7-F replace a standard PNP BJT with external bias resistors?

Yes - it replaces a discrete PNP transistor plus two 2.2kΩ resistors. Pin compatibility with standard SOT23 PNP devices (Emitter=Pin1, Base=Pin2, Collector=Pin3) enables drop-in substitution, provided the original design used matched 2.2kΩ biasing and does not require adjustable base current.

Does this part support 24V system applications?

Yes - its −40V V_CEO and −50V V_CBO ratings provide 16V+ margin above nominal 24V rail, accommodating load dump transients per ISO 7637-2 Pulse 1/2a. The −0.3V V_CE(sat) ensures minimal voltage drop during sustained 24V load switching.

DDTB123EC-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):: 500 mA

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

Resistor - Base (R1):: 2.2 kOhms

Resistor - Emitter Base (R2):: 2.2 kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: 39 @ 50mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 2.5mA, 50mA

Current - Collector Cutoff (Max):: 500nA

Frequency - Transition:: 200 MHz

Power - Max:: 200 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

DDTB123EC-7-F FAQ

1.How can I place an order for DDTB123EC-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTB123EC-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 DDTB123EC-7-F reliable?

The price and inventory of DDTB123EC-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 DDTB123EC-7-F is usually 5 days.

3.What payment methods are accepted for DDTB123EC-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTB123EC-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTB123EC-7-F?

DDTB123EC-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTB123EC-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 DDTB123EC-7-F?

For technical support, including DDTB123EC-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTB123EC-7-F requirements.

6.How does Aetrix verify that DDTB123EC-7-F is sourced from the original manufacturer or authorized distributors?

All DDTB123EC-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 DDTB123EC-7-F meets industry standards.

7.What is the process for return or replacement of DDTB123EC-7-F?

All DDTB123EC-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTB123EC-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 DDTB123EC-7-F part is unused and in its original packaging.

Return procedure for DDTB123EC-7-F:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…