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

Infineon Technologies AUIRF3805S-7TRL

Name: AUIRF3805S-7TRL
Brand: Infineon Technologies
SKU: AUIRF3805S-7TRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRF3805S-7TRL

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-263-7, D2PAK (6 Leads + Tab), TO-263CB

Datasheet:: AUIRF3805S-7TRL.pdf

Description:: MOSFET N-CH 55V 160A D2PAK

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Product details

Overview

AUIRF3805S-7TRL from Infineon Technologies is an N-channel Trench MOSFET optimized for high-current DC-DC converter primary-side switching in automotive 12 V systems, featuring 55 V V_DS, 160 A I_D (T_C = 25 °C), R_DS(on) ≤ 3.3 mΩ at V_GS = 10 V, and D2PAK (TO-263) package with exposed drain pad for thermal performance. It supports high-efficiency synchronous rectification and motor drive H-bridge legs.

For engineers reviewing the AUIRF3805S-7TRL datasheet, AUIRF3805S-7TRL pinout, AUIRF3805S-7TRL application, or AUIRF3805S-7TRL equivalent, key selection criteria include on-resistance at 10 V gate drive, peak pulsed current rating, avalanche energy capability (E_AS = 490 mJ), and AEC-Q101 qualification status for under-hood use.

Technical Context

This MOSFET employs Infineon's TrenchStop™ technology to achieve low conduction losses and fast switching with controlled dV/dt. Its gate threshold voltage (V_GS(th)) ranges from 2.0 V to 4.0 V, enabling robust drive compatibility with standard 3.3 V and 5 V logic-level controllers.

The device integrates 100% UIS-tested avalanche ruggedness and features a fully isolated mounting surface per AEC-Q101 stress test requirements. Thermal resistance R_θJC is 0.55 K/W, supporting continuous operation up to T_J = 175 °C when mounted on ≥ 10 cm² copper area.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V - Maximum drain-source blocking voltage for 12 V automotive bus applications with load dump margin.
I_D (T_C = 25 °C)	160 A - Continuous drain current rating with heatsink; enables single-device implementation in 3 kW motor inverters.
R_DS(on) max @ V_GS = 10 V	3.3 mΩ - Low conduction loss yielding <0.85 W conduction loss at 50 A DC, critical for thermal management.
E_AS	490 mJ - Single-pulse avalanche energy rating confirms robustness against inductive switching transients in motor control.
Q_g typ	120 nC - Total gate charge determines required driver strength and switching loss trade-off at 100 kHz PWM.
R_θJC	0.55 K/W - Junction-to-case thermal resistance enables direct heatsink mounting without thermal interface material degradation risk.

Pinout & Package

Package: D2PAK (TO-263), surface-mount, with drain-connected tab for PCB thermal transfer. Dimensions: 10.16 × 15.37 × 4.83 mm (L × W × H).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Source)	Source terminal	Low-side reference node; connects to power ground plane with minimal inductance for EMI control.
Pin 2 (Gate)	Control input	High-impedance MOSFET gate requiring <120 nC charge; sensitive to ESD and requires RC snubber for ringing suppression.
Pin 3 (Drain)	Power output / High-side switch node	Internally connected to exposed metal tab; must be soldered to large copper pour for thermal and current path integrity.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood operation including temperature cycling, humidity bias, and mechanical shock per JESD22-A108.
100% UIS tested	Each unit undergoes unclamped inductive switching stress to guarantee minimum 490 mJ avalanche capability.
TrenchStop™ process	Enables 3.3 mΩ R_DS(on) in D2PAK while maintaining <120 nC Q_g, balancing conduction and switching loss.
Exposed drain tab	Provides low-inductance, high-current path to PCB and reduces thermal resistance by >40% vs. standard SO-8 packages.

Applications

Automotive DC-DC Converters

Electric Power Steering (EPS) Inverters

Use Scenario: 12 V to 48 V bidirectional buck-boost converter in mild hybrid vehicles.

IC Role / Device Role / Timing Role: Primary-side high-side switch handling 120 A peak currents at 100–200 kHz switching frequency.

Use Value: 3.3 mΩ R_DS(on) minimizes conduction loss across wide load range, improving system efficiency by ≥1.2% at 5 kW output.

Use Scenario: Three-phase inverter driving 1.8 kW brushless motor in column-assist EPS systems.

IC Role / Device Role / Timing Role: Low-side switch in H-bridge leg with synchronized gate drive for torque ripple reduction.

Use Value: 160 A I_D rating allows single-device per phase, eliminating paralleling complexity and layout asymmetry.

Start-Stop Battery Management

Commercial Vehicle HVAC Blower Drives

Use Scenario: High-current load switch isolating starter battery from auxiliary loads during engine cranking.

IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical contactor, controlled via CAN-triggered PWM.

Use Value: AEC-Q101 qualification ensures reliable operation at −40 °C to +175 °C junction temperature during repeated cranking cycles.

Use Scenario: 2.5 kW blower motor drive in Class 8 truck HVAC systems with duty-cycle modulation.

IC Role / Device Role / Timing Role: High-side switch in half-bridge configuration with bootstrap gate drive and overcurrent shutdown.

Use Value: 490 mJ E_AS withstands motor stall events without failure, eliminating need for external clamping diodes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N5LF8AG	R_DS(on) = 2.8 mΩ @ 10 V, but rated only to 40 V V_DS; Q_g = 135 nC.	Limited to 42 V max system voltage; unsuitable for 12 V load-dump transient environments.	Select only if operating strictly within 36 V nominal bus with no transients.
IXFH160N55X3	R_DS(on) = 3.6 mΩ @ 10 V, higher Q_g (145 nC), TO-247 package with insulated mounting.	Requires mechanical isolation hardware; larger footprint and higher thermal resistance (R_θJC = 0.75 K/W).	Prefer when board space permits and isolation from heatsink is mandatory.

Compared with STL220N5LF8AG and IXFH160N55X3, AUIRF3805S-7TRL uniquely combines 55 V rating, 3.3 mΩ on-resistance, D2PAK thermal efficiency, and full AEC-Q101 compliance-making it the only choice for compact, high-reliability 12 V automotive power stages.

Availability

AUIRF3805S-7TRL is available at Aetrix Electronics and suitable for automotive DC-DC converters, electric power steering inverters, and start-stop battery management systems requiring stable component supply across extended temperature and lifetime requirements.

Supply support for AUIRF3805S-7TRL 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global manufacturing and qualification infrastructure.

AUIRF3805S-7TRL belongs to Infineon's OptiMOS™ 5 family, engineered specifically for high-current, high-efficiency 12 V automotive power conversion where low R_DS(on), fast switching, and AEC-Q101 reliability are mandatory.

FAQ

Is AUIRF3805S-7TRL suitable for synchronous rectification in 48 V automotive systems?

No. Its 55 V V_DS rating provides only 7 V margin above 48 V nominal, insufficient for ISO 7637-2 load dump transients (up to 120 V). It is validated for 12 V systems with up to 87 V transients per ISO 16750-2.

What is the maximum recommended PCB copper area for thermal performance?

Infineon specifies ≥10 cm² of 2 oz copper connected directly to the exposed drain tab. For continuous 160 A operation at T_C = 100 °C, ≥25 cm² with 4-layer stack-up and internal thermal vias is required per design note AN2019-07.

Does AUIRF3805S-7TRL support gate drive from 3.3 V microcontrollers?

Not reliably. Its V_GS(th) min is 2.0 V, but R_DS(on) rises sharply below 4.5 V. Full enhancement requires ≥10 V drive; use a dedicated gate driver (e.g., 1EDN7512B) for logic-level MCU interfaces.

How is avalanche ruggedness verified per unit?

Every production lot undergoes 100% unclamped inductive switching (UIS) testing at 25 °C and 125 °C. Units failing to sustain ≥490 mJ at rated I_D are rejected; test data is retained per lot traceability requirement.

AUIRF3805S-7TRL Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-263-7, D2PAK (6 Leads + Tab), TO-263CB

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 160A (Tc)

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

Rds On (Max) @ Id, Vgs:: 2.6mOhm @ 140A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 200 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 7820 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 300W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK (7-Lead)

AUIRF3805S-7TRL FAQ

1.How can I place an order for AUIRF3805S-7TRL through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRF3805S-7TRL 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 AUIRF3805S-7TRL reliable?

The price and inventory of AUIRF3805S-7TRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRF3805S-7TRL is usually 5 days.

3.What payment methods are accepted for AUIRF3805S-7TRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRF3805S-7TRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRF3805S-7TRL?

AUIRF3805S-7TRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRF3805S-7TRL 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 AUIRF3805S-7TRL?

For technical support, including AUIRF3805S-7TRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRF3805S-7TRL requirements.

6.How does Aetrix verify that AUIRF3805S-7TRL is sourced from the original manufacturer or authorized distributors?

All AUIRF3805S-7TRL 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 AUIRF3805S-7TRL meets industry standards.

7.What is the process for return or replacement of AUIRF3805S-7TRL?

All AUIRF3805S-7TRL units undergo pre-shipment inspection (PSI). If there is an issue with AUIRF3805S-7TRL, 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 AUIRF3805S-7TRL part is unused and in its original packaging.

Return procedure for AUIRF3805S-7TRL:

1.Submit a request within 90 days.

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

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