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

Diodes Incorporated DDTC122TE-7-F

Name: DDTC122TE-7-F
Brand: Diodes Incorporated
SKU: DDTC122TE-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTC122TE-7-F

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: DDTC122TE-7-F.pdf

Description:: TRANS PREBIAS NPN 150MW SOT523

Quantity:: RFQ Add To RFQ list

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Inventory:5,870

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Product details

Overview

DDTC122TE-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with integrated 220Ω base-emitter resistor (R1), no R2 (open), AEC-Q101 qualified, rated for 50V V_CBO, 40V V_CEO, and 5V V_EBO, used in automotive signal switching and level translation circuits.

For engineers reviewing the DDTC122TE-7-F datasheet, DDTC122TE-7-F pinout, DDTC122TE-7-F application, or DDTC122TE-7-F equivalent, key selection criteria include its R1-only bias configuration, 100–600 h_FE range at 1mA/5V, 0.3V V_CE(SAT), 150mW power dissipation, and SOT523 thermal performance under automotive ambient conditions.

Technical Context

This device implements a single NPN transistor with monolithic base-emitter bias resistor (R1 = 220Ω) and no second resistor (R2 open), enabling simplified high-side switch control without external bias network. It operates with V_EBO = 5V maximum and supports I_C up to 100mA.

The SOT523 package delivers 625°C/W junction-to-ambient thermal resistance on FR-4 PCBs, supporting operation from –55°C to +150°C. Its h_FE of 100–600 at I_C = 1mA/V_CE = 5V ensures stable gain in low-current digital interface applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CBO	50 V - Maximum collector-base voltage before breakdown; defines safe operating voltage margin in high-side switch configurations.
V_CEO	40 V - Maximum collector-emitter voltage with base open; sets upper limit for load supply rail compatibility.
V_EBO	5 V - Maximum emitter-base reverse voltage; constrains input signal swing when used as level shifter.
h_FE	100–600 - DC current gain at I_C = 1mA/V_CE = 5V; enables predictable drive capability for logic-controlled loads.
V_CE(SAT)	0.3 V - Saturation voltage at I_C = 5mA/I_B = 0.25mA; minimizes conduction loss in low-power switching.
P_D	150 mW - Maximum power dissipation at T_A = 25°C; determines thermal derating envelope on standard PCB layouts.

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.75 mm), moisture sensitivity level 1, matte tin terminals, UL 94V-0 rated molding compound.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal	Reference node for bias resistor network; connects to ground or low-side return path in switch topology.
2 (Base)	Base connection point	Internal connection to R1 (220Ω); no external R2 - simplifies layout for fixed-gain digital input stages.
3 (Collector)	Collector terminal	Output node carrying switched load current; requires proper trace width and thermal relief for 100mA peak operation.

Key Features

Feature	Design Value
R1-only internal bias resistor	220Ω between base and emitter - eliminates need for external pull-down, reducing BOM count in GPIO-driven switches.
AEC-Q101 qualification	Validated for automotive temperature cycling, humidity, and mechanical stress - supports under-hood and infotainment module deployment.
SOT523 footprint	1.60 × 1.60 mm outline with 0.50 mm lead pitch - enables high-density routing in space-constrained ECUs and sensor modules.
Halogen- and antimony-free "Green" construction	<900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets global environmental compliance mandates without sacrificing reliability.

Applications

Automotive Door Module Switching

Industrial Sensor Interface Level Translation

Use Scenario: Controlling LED status indicators and small solenoid drivers in door control units using 3.3V microcontroller GPIOs.

IC Role / Device Role / Timing Role: NPN pre-biased switch translating logic-level signals to 12V load side while isolating MCU pins from transients.

Use Value: Eliminates discrete base resistor placement; 0.3V V_CE(SAT) ensures minimal voltage drop across indicator LEDs at 20mA.

Use Scenario: Converting 5V sensor output signals to 3.3V logic levels for ADC input on industrial PLC I/O cards.

IC Role / Device Role / Timing Role: Active-low level shifter with defined V_EBO = 5V tolerance, protecting downstream logic from overvoltage faults.

Use Value: R1-only configuration provides consistent turn-on threshold; h_FE ≥100 guarantees reliable switching at 100µA input drive.

Consumer Appliance Motor Control Feedback

Medical Diagnostic Equipment Signal Conditioning

Use Scenario: Isolating hall-effect sensor outputs from brushless motor driver ICs in washing machine main control boards.

IC Role / Device Role / Timing Role: Digital buffer stage providing current gain and noise immunity between analog sensors and digital controllers.

Use Value: 150mW power rating allows continuous operation at 50°C ambient; SOT523 footprint fits tight spacing near motor connectors.

Use Scenario: Enabling/disabling analog front-end channels in portable ultrasound probe interfaces using low-leakage control lines.

IC Role / Device Role / Timing Role: Precision enable switch with <0.5µA I_EBO ensuring minimal channel crosstalk during standby.

Use Value: V_EBO = 5V and I_EBO ≤0.5µA prevent false triggering from ESD-induced base-emitter leakage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DDTC122JE-7-F	Includes both R1 = 220Ω and R2 = 10kΩ; higher input impedance, lower input current (13mA vs. 28mA @5V).	Preferred where input drive current must be minimized, e.g., weak GPIOs or battery-powered nodes.	Select when dual-resistor bias improves noise immunity or reduces MCU loading; not drop-in due to different input characteristics.
NSVD2101PT3G	Same SOT-523, R1 = 220Ω only, but rated for 100V V_CBO and 50V V_CEO; higher V_EBO = 6V.	Suitable for 24V industrial systems requiring extended voltage headroom beyond 12V automotive rails.	Choose for higher-voltage robustness; identical pinout and bias architecture, but requires validation of gain consistency at elevated V_CE.

Compared with DDTC122JE-7-F, DDTC122TE-7-F offers lower input current demand and simpler biasing, while NSVD2101PT3G extends voltage capability at the cost of slightly reduced h_FE uniformity above 10V V_CE.

Availability

DDTC122TE-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for DDTC122TE-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 with AEC-Q101-qualified components.

This part belongs to the DDTC series of pre-biased transistors designed specifically for simplified digital switching in space- and reliability-constrained applications, emphasizing automotive-grade robustness and green manufacturing compliance.

FAQ

Is DDTC122TE-7-F still in active production?

No - Diodes Incorporated has marked DDTC122TE-7-F as obsolete per DS30404 Rev. 8-4 (June 2021). Aetrix Electronics maintains limited legacy stock and supports last-time-buy planning, cross-reference validation, and alternative sourcing for ongoing production programs.

What is the function of the "OPEN" R2 specification in DDTC122TE-7-F?

The "OPEN" designation means no second bias resistor is integrated between base and collector. This configuration yields lower input current (28mA @5V) and faster turn-off compared to dual-resistor variants like DDTC122JE-7-F, making it ideal for direct GPIO driving without additional pull-up requirements.

Can DDTC122TE-7-F replace a standard 2N3904 in a switching circuit?

Only with circuit redesign: DDTC122TE-7-F integrates a 220Ω base-emitter resistor and lacks base access, so it cannot substitute for a discrete 2N3904 without removing external bias components. Its fixed bias enables smaller footprints but removes gain and bias flexibility inherent in bare transistors.

Does the SOT523 package support automated optical inspection (AOI) after reflow?

Yes - the SOT523's defined pad layout (1.60 × 1.60 mm body, 0.50 mm lead pitch, 0.22 mm lead width) and matte tin finish meet IPC-A-610 Class 2/3 solder joint visibility standards, enabling reliable AOI detection of solder bridging, lift, and insufficient fillet on production lines.

DDTC122TE-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: -

DDTC122TE-7-F FAQ

1.How can I place an order for DDTC122TE-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTC122TE-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 DDTC122TE-7-F reliable?

The price and inventory of DDTC122TE-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 DDTC122TE-7-F is usually 5 days.

3.What payment methods are accepted for DDTC122TE-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC122TE-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTC122TE-7-F?

DDTC122TE-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTC122TE-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 DDTC122TE-7-F?

For technical support, including DDTC122TE-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC122TE-7-F requirements.

6.How does Aetrix verify that DDTC122TE-7-F is sourced from the original manufacturer or authorized distributors?

All DDTC122TE-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 DDTC122TE-7-F meets industry standards.

7.What is the process for return or replacement of DDTC122TE-7-F?

All DDTC122TE-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC122TE-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 DDTC122TE-7-F part is unused and in its original packaging.

Return procedure for DDTC122TE-7-F:

1.Submit a request within 90 days.

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

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