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

Infineon Technologies AUIRLS8409-7TRL

Name: AUIRLS8409-7TRL
Brand: Infineon Technologies
SKU: AUIRLS8409-7TRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRLS8409-7TRL

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: AUIRLS8409-7TRL.pdf

Description:: MOSFET N-CH 40V 240A D2PAK

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Product details

Overview

AUIRLS8409-7TRL from Infineon is an automotive-grade N-channel HEXFET® Power MOSFET in D2PAK-7L package, rated for 40 V V_DSS, 0.50 mΩ typ. R_DS(on) at V_GS = 10 V, and 240 A continuous drain current (package-limited), designed for high-current switching in electric power steering and battery disconnect circuits.

For engineers reviewing the AUIRLS8409-7TRL datasheet, AUIRLS8409-7TRL pinout, AUIRLS8409-7TRL application, or AUIRLS8409-7TRL equivalent, key selection criteria include ultra-low on-resistance at logic-level gate drive (4.5 V), 175°C junction rating, repetitive avalanche capability, and D2PAK-7L thermal performance under high-pulse-current conditions.

Technical Context

This MOSFET employs advanced trench process technology to achieve silicon-limited 500 A ID at 25°C and package-limited 240 A continuous conduction, with fast switching (t_r = 71 ns, t_f = 115 ns) enabled by low gate charge (Q_g = 177 nC typ.) and optimized internal gate resistance (R_G = 2.0 Ω).

It supports robust unclamped inductive switching via rated repetitive avalanche energy (E_AR = 500 mJ at T_J = 25°C), body diode recovery (t_rr = 52 ns, Q_rr = 97 nC), and high dv/dt immunity (2.4 V/ns at T_J = 175°C), all validated per AEC-Q101 for automotive underhood environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	40 V - Maximum drain-source blocking voltage; enables use in 12 V/24 V automotive systems with margin against load dump transients.
R_DS(on) typ.	0.50 mΩ at V_GS = 10 V - Delivers <12 W conduction loss at 240 A, critical for EPS motor control efficiency.
I_D cont. (pkg)	240 A at T_C = 25°C - Package-limited continuous current defined by bond wire capacity, not silicon limit.
Q_g	177 nC typ. - Enables fast turn-on with moderate gate driver strength; reduces switching losses in 10–100 kHz DC-DC converters.
T_J max	+175°C - Supports operation in engine bay locations without derating below ambient +125°C.
E_AS	1580 mJ (tested) - Single-pulse avalanche energy rating ensures reliability during inductive turn-off faults in battery switch applications.
dv/dt	2.4 V/ns at T_J = 175°C - High noise immunity prevents spurious turn-on in high-di/dt motor drive environments.

Pinout & Package

D2PAK-7L (TO-263-7) thermally enhanced surface-mount package with exposed drain pad (pins 1–3 and 5–7 are source; pin 4 is gate; drain connected to backside metal tab). Optimized for PCB heat spreading and high-current routing.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 5, 6, 7	Source	Internally paralleled source terminals reduce package inductance and improve current sharing in high-frequency PWM.
4	Gate	Single gate input with 2.0 Ω internal resistance; compatible with standard 3.3 V/5 V logic-level drivers without external gate resistor.
Drain (Tab)	Drain	Exposed copper drain pad soldered to large PCB copper area; provides <0.4 °C/W R_θJC for thermal management in >200 W dissipation scenarios.

Key Features

Feature	Design Value
Logic-level gate drive	Full enhancement at V_GS = 4.5 V (R_DS(on) ≤ 0.85 mΩ), enabling direct interface with microcontroller GPIOs in EPS ECUs.
Ultra-low R_DS(on)	0.50 mΩ typ. at 10 V - Reduces I²R losses by >40% vs. prior-gen 40 V automotive MOSFETs, extending battery range in start-stop systems.
Repetitive avalanche rated	Validated E_AR up to 500 mJ - Allows safe operation during repeated inductive switching events without external snubbers in DC-DC converter primary switches.
175°C junction rating	Rated for continuous operation at T_J = 175°C - Eliminates thermal derating in confined engine compartment layouts with limited airflow.
Automotive qualification	AEC-Q101 qualified and PPAP-capable - Meets stress test requirements for vibration, temperature cycling, and humidity for safety-critical EPS and battery disconnect modules.

Applications

Electric Power Steering (EPS)

Battery Disconnect Switch

Use Scenario: High-current H-bridge motor driver controlling 12 V or 24 V assist motors in passenger vehicle steering columns.

IC Role / Device Role / Timing Role: Low-side switching element in three-phase inverter; handles bidirectional 200+ A peak currents with <1 µs dead-time tolerance.

Use Value: 0.50 mΩ R_DS(on) limits conduction loss to <20 W at 200 A, reducing heatsink size and enabling compact ECU packaging.

Use Scenario: Main contactor replacement in 12 V battery management systems for automatic isolation during crash or fault detection.

IC Role / Device Role / Timing Role: Single-pole, high-current solid-state switch placed between battery and main distribution bus; controlled by safety MCU.

Use Value: 240 A continuous rating and 1200 A pulsed capability support ASIL-D fault response within 10 ms without thermal runaway.

Start/Stop Micro-Hybrid

High-Power DC-DC Converter

Use Scenario: Engine cranking assist and regenerative braking energy routing in 48 V mild hybrid architectures.

IC Role / Device Role / Timing Role: Synchronous rectifier and buck/boost switch in bi-directional 48 V–12 V converter; operates at 50–100 kHz.

Use Value: Low Q_gd/Q_gs ratio (80/65 nC) minimizes Miller-induced shoot-through risk during hard commutation.

Use Scenario: Primary-side high-frequency switch in isolated 3 kW on-board charger DC-DC stage for EVs.

IC Role / Device Role / Timing Role: Hard-switched MOSFET in full-bridge topology; subjected to 100 A peak drain current and 400 V transient spikes.

Use Value: 1580 mJ tested E_AS withstands unclamped inductive energy during overcurrent shutdown without device failure.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current automotive MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4L10AG	40 V, 0.45 mΩ typ., DFN8 5×6 mm package; lower R_DS(on) but 120 A package limit and no avalanche rating.	Suitable for space-constrained low-power EPS modules; not rated for battery disconnect pulse currents >300 A.	Select when board area is critical and peak current <150 A; avoid where unclamped inductive switching occurs.
IPB180N04S4-02	40 V, 0.55 mΩ typ., TO-263-7 package; AEC-Q101 qualified, 200 A continuous, 1000 mJ E_AS.	Lower pulse current capability (1000 A vs. 1200 A) and higher gate charge (210 nC) increase driver complexity.	Prefer for cost-sensitive designs where 175°C operation is not required; verify thermal design with higher R_θJA (40 °C/W).

Compared with STL220N4L10AG and IPB180N04S4-02, AUIRLS8409-7TRL uniquely combines 240 A continuous current, 1200 A pulsed rating, and 1580 mJ tested avalanche energy in a thermally optimized D2PAK-7L package-making it the only option qualified for both high-reliability battery disconnect and high-dynamic EPS motor control.

Availability

AUIRLS8409-7TRL is available at Aetrix Electronics and suitable for electric power steering (EPS), battery disconnect switches, start-stop micro-hybrid systems, and high-power DC-DC converters requiring stable component supply across automotive production lifecycles.

Supply support for AUIRLS8409-7TRL 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 industrial control ICs, with global manufacturing and AEC-Q101 validation infrastructure.

AUIRLS8409-7TRL belongs to Infineon's automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for high-current, high-reliability switching in engine bay and battery system applications demanding 175°C operation and repetitive avalanche robustness.

FAQ

Is AUIRLS8409-7TRL pin-compatible with AUIRLS8409-7P?

Yes - both share identical D2PAK-7L pinout and thermal pad layout. The "-7TRL" suffix denotes tape-and-reel packaging (800 units per reel), while "-7P" indicates tube packaging (50 units). Electrical and thermal specifications are identical; only packaging and reel orientation differ.

What is the maximum recommended gate resistor for hard-switching at 100 kHz?

A 2.7 Ω gate resistor is specified in the datasheet for switching characterization (t_d(on), t_f). For 100 kHz hard-switching, a 1.5–3.3 Ω non-inductive resistor balances turn-on speed (minimizing overlap loss) and dV/dt control (preventing parasitic oscillation), given the device's 2.0 Ω internal R_G and 177 nC Q_g.

Does the body diode support synchronous rectification in a 48 V–12 V buck converter?

Yes - the body diode has t_rr = 52 ns and Q_rr = 97 nC at 100 A, enabling efficient synchronous rectification up to ~80 kHz. However, its V_SD = 0.8–1.2 V forward drop increases conduction loss versus an external Schottky; best used in asymmetrical topologies where duty cycle favors low-side conduction.

How is thermal performance affected when mounted on 2 oz copper without thermal vias?

R_θJA rises from 40 °C/W (1" FR-4) to ~55–60 °C/W with 2 oz copper alone. To maintain T_J < 150°C at 240 A, case temperature must stay below 75°C - achievable only with forced air or heatsink attachment. Thermal vias under the drain pad reduce R_θJA by 30–40%, restoring safe operation at full current.

AUIRLS8409-7TRL Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 240A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 0.75mOhm @ 100A, 10V

Vgs(th) (Max) @ Id:: 2.4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 266 nC @ 4.5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 16488 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 375W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-TO263-7

AUIRLS8409-7TRL FAQ

1.How can I place an order for AUIRLS8409-7TRL through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRLS8409-7TRL 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 AUIRLS8409-7TRL reliable?

The price and inventory of AUIRLS8409-7TRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRLS8409-7TRL is usually 5 days.

3.What payment methods are accepted for AUIRLS8409-7TRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRLS8409-7TRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRLS8409-7TRL?

AUIRLS8409-7TRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRLS8409-7TRL 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 AUIRLS8409-7TRL?

For technical support, including AUIRLS8409-7TRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRLS8409-7TRL requirements.

6.How does Aetrix verify that AUIRLS8409-7TRL is sourced from the original manufacturer or authorized distributors?

All AUIRLS8409-7TRL 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 AUIRLS8409-7TRL meets industry standards.

7.What is the process for return or replacement of AUIRLS8409-7TRL?

All AUIRLS8409-7TRL units undergo pre-shipment inspection (PSI). If there is an issue with AUIRLS8409-7TRL, 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 AUIRLS8409-7TRL part is unused and in its original packaging.

Return procedure for AUIRLS8409-7TRL:

1.Submit a request within 90 days.

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

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