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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Diodes Incorporated DMG3401LSNQ-7

Name: DMG3401LSNQ-7
Brand: Diodes Incorporated
SKU: DMG3401LSNQ-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DMG3401LSNQ-7

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

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

Datasheet:: DMG3401LSNQ-7.pdf

Description:: MOSFET P-CH 30V 3A SC59-3

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Product details

Overview

DMG3401LSNQ-7 from Diodes Incorporated is a 30V P-channel enhancement-mode MOSFET in SC59 package, featuring 50mΩ R_DS(on) at V_GS = −10V, −3.7A continuous drain current, and AEC-Q101 qualification for automotive use. It serves as a high-efficiency load switch in low-voltage DC-DC converters and backlight dimming circuits.

For engineers reviewing the DMG3401LSNQ-7 datasheet, DMG3401LSNQ-7 pinout, DMG3401LSNQ-7 application, or DMG3401LSNQ-7 equivalent, key selection criteria include gate threshold voltage (−0.5 to −1.3V), low-input capacitance (1326pF C_iss), thermal resistance (105°C/W R_θJA on 2oz copper), and automotive-grade reliability under IATF16949 manufacturing.

Technical Context

This MOSFET operates in enhancement mode with negative gate control logic, requiring V_GS ≤ −1.0V to fully turn on. Its low R_DS(on) at −4.5V (60mΩ) enables efficient operation in 3.3V/5V logic-driven power rails.

The device integrates a body diode with V_SD = −0.8 to −1.0V at −1A, supporting synchronous rectification and reverse-current blocking in buck converters and H-bridge motor drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	−30V - supports input rails up to 24V automotive systems with margin
R_DS(on) @ V_GS = −10V	50mΩ max - enables <185mW conduction loss at 3.7A
I_D continuous @ T_A = +25°C	−3.7A - sufficient for 5W load switching with derating
C_iss	1326pF - limits gate drive power and switching speed in 1MHz-class converters
Q_g @ V_GS = −10V	25.1nC - determines minimum gate driver peak current for <20ns rise time
T_J range	−55°C to +150°C - validated for under-hood automotive environments
R_θJA (2oz Cu)	105°C/W - defines maximum power dissipation (1.14W) before thermal shutdown

Pinout & Package

Package: SC59 - surface-mount, 3-pin, lead-free molded plastic housing with matte tin annealed terminals; moisture sensitivity level 1 per J-STD-020; weight ≈0.014g.

Pin/Terminal	Circuit Role	Design Meaning
Drain (D)	Power output node	Connected to load return path; handles full switched current and dissipates heat via PCB copper pad
Gate (G)	Control input	Receives negative logic signal; requires ≥−10V swing for minimal R_DS(on); sensitive to ESD (±12V rating)
Source (S)	Reference node	Bonded to internal substrate; tied to system ground or high-side rail; forms common return for body diode conduction

Key Features

Feature	Design Value
Low R_DS(on) at −4.5V	60mΩ max - enables direct interface with 3.3V microcontroller GPIO without level-shifting
AEC-Q101 qualification	Validated for automotive temperature cycling, humidity, and mechanical shock - supports PPAP documentation
Green packaging	Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) - complies with EU RoHS 3 and automotive ELV directives
Low C_iss/C_rss ratio	1326pF / 71pF - improves Miller immunity and reduces gate oscillation risk in high-dV/dt environments

Applications

Automotive Body Control Module

LED Backlight Dimming

Use Scenario: Switching 12V loads such as door locks, mirror heaters, and interior lighting in BCMs.

IC Role / Device Role / Timing Role: High-side load switch controlled by CAN/LIN microcontroller GPIO with active-low logic.

Use Value: −3.7A rating and 50mΩ R_DS(on) limit resistive heating to <700mW at full load, enabling compact PCB layout without heatsinking.

Use Scenario: PWM-controlled current sink for white LED strings in instrument cluster or center console displays.

IC Role / Device Role / Timing Role: Low-side current regulator synchronized to MCU PWM output at 1–20kHz.

Use Value: Fast 13ns rise time and 38ns fall time support precise dimming resolution with minimal current overshoot.

USB-C Power Delivery Sink

Industrial 24V DC-DC Pre-regulator

Use Scenario: Reverse-polarity protection and inrush limiting for 5–20V USB-C PD input stages.

IC Role / Device Role / Timing Role: P-channel high-side switch placed between connector and buck controller input.

Use Value: −30V V_DSS and −1.3V V_GS(th) ensure reliable turn-on during hot-plug events with ±10% input tolerance.

Use Scenario: Input stage switch in isolated flyback or forward converters accepting 18–32V industrial supply.

IC Role / Device Role / Timing Role: Primary-side synchronous rectifier or auxiliary bias rail switch.

Use Value: 150°C max junction temperature and 105°C/W thermal resistance allow sustained operation at 85°C ambient with 1W dissipation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN3026LSD-13	Same SC59 package; lower R_DS(on) (30mΩ @ −10V) but higher Q_g (34nC); no AEC-Q101 rating	Suitable for commercial-grade DC-DC converters where automotive qualification is not required	Select when lower conduction loss outweighs gate drive complexity and qualification needs
SI2301DS-T1-BE3	SC70 package; higher R_DS(on) (115mΩ @ −4.5V); same −30V rating and AEC-Q101 qualification	Fits space-constrained designs where thermal performance is secondary to footprint size	Select only if board area is critical and 2.7A max current suffices

Compared with DMN3026LSD-13 and SI2301DS-T1-BE3, the DMG3401LSNQ-7 uniquely balances automotive qualification, 3.7A current capability, and 60mΩ R_DS(on) at logic-level −4.5V drive-making it optimal for cost-sensitive, thermally constrained automotive power switches.

Availability

DMG3401LSNQ-7 is available at Aetrix Electronics and suitable for automotive body control modules, LED backlight dimming circuits, USB-C power delivery protection, and industrial 24V DC-DC pre-regulators requiring stable component supply across production lifecycles.

Supply support for DMG3401LSNQ-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 ICs, with design centers in Asia, Europe, and the U.S., and manufacturing in IATF16949-certified facilities.

The DMG3401LSNQ-7 belongs to Diodes' automotive-qualified small-signal MOSFET product line, engineered specifically for high-reliability, low-voltage power switching in body electronics and infotainment subsystems.

FAQ

What is the maximum safe operating voltage for DMG3401LSNQ-7 in continuous DC applications?

The absolute maximum drain-source voltage (V_DSS) is −30V, verified per DS37966 Rev. 2-2. Operation above −27V is not recommended for long-term reliability in automotive environments due to derating requirements. At −24V, the device maintains full −3.7A current capability with R_DS(on) increase limited to <15% over nominal.

Can DMG3401LSNQ-7 be driven directly by a 3.3V microcontroller GPIO?

Yes - its gate threshold voltage (V_GS(th)) ranges from −0.5V to −1.3V, so a 3.3V GPIO pulled low (0V) while source is at 3.3V yields V_GS = −3.3V, well within the −4.5V condition where R_DS(on) is specified at 60mΩ. No level shifter is needed for basic on/off control.

Is the body diode of DMG3401LSNQ-7 suitable for reverse-current protection in USB-C applications?

Yes - the body diode has V_SD = −0.8 to −1.0V at −1A and supports continuous reverse current up to −1.5A. In USB-C sink configurations, it blocks reverse current from VBUS to the host when the MOSFET is off, meeting USB PD 3.1 reverse-conduction requirements without external diode addition.

How does the thermal performance of DMG3401LSNQ-7 compare between FR-4 and 2oz copper PCB layouts?

On standard FR-4 with minimum pad layout, R_θJA is 159°C/W (PD = 0.8W). With 2oz copper and 1-inch square pad, R_θJA improves to 105°C/W (PD = 1.2W). This 34% thermal resistance reduction allows 50% higher power handling - critical for sustained 3.3A operation in enclosed automotive enclosures.

DMG3401LSNQ-7 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

FET Type:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 3A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 2.5V, 10V

Rds On (Max) @ Id, Vgs:: 50mOhm @ 4A, 10V

Vgs(th) (Max) @ Id:: 1.3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 25.1 nC @ 10 V

Vgs (Max):: ±12V

Input Capacitance (Ciss) (Max) @ Vds:: 1326 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 800mW

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-59-3

DMG3401LSNQ-7 FAQ

1.How can I place an order for DMG3401LSNQ-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DMG3401LSNQ-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 DMG3401LSNQ-7 reliable?

The price and inventory of DMG3401LSNQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMG3401LSNQ-7 is usually 5 days.

3.What payment methods are accepted for DMG3401LSNQ-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMG3401LSNQ-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DMG3401LSNQ-7?

DMG3401LSNQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DMG3401LSNQ-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 DMG3401LSNQ-7?

For technical support, including DMG3401LSNQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMG3401LSNQ-7 requirements.

6.How does Aetrix verify that DMG3401LSNQ-7 is sourced from the original manufacturer or authorized distributors?

All DMG3401LSNQ-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 DMG3401LSNQ-7 meets industry standards.

7.What is the process for return or replacement of DMG3401LSNQ-7?

All DMG3401LSNQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DMG3401LSNQ-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 DMG3401LSNQ-7 part is unused and in its original packaging.

Return procedure for DMG3401LSNQ-7:

1.Submit a request within 90 days.

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

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