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Infineon Technologies AUIRFS8409-7P
- Part No.:
- AUIRFS8409-7P
- Manufacturer:
- Infineon Technologies
- Category:
- FETs, MOSFETs
- Package:
- TO-263-7, D2PAK (6 Leads + Tab)
- Datasheet:
-
AUIRFS8409-7P.pdf
- Description:
- MOSFET N-CH 40V 240A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:300
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Product details
Overview
AUIRFS8409-7P from Infineon Technologies (formerly International Rectifier) is an N-channel enhancement-mode HEXFET® Power MOSFET in D2PAK-7L package, rated for 40 V VDS, 0.55 mΩ typ. RDS(on) at VGS = 10 V, and 240 A continuous drain current (package-limited). It integrates a robust body diode and supports high-current synchronous rectification in automotive DC-DC converters.
For engineers reviewing the AUIRFS8409-7P datasheet, AUIRFS8409-7P pinout, AUIRFS8409-7P application, or AUIRFS8409-7P equivalent, key selection criteria include its ultra-low on-resistance, 1200 A pulsed drain capability, avalanche-rated operation up to 1485 mJ, junction-to-case thermal resistance of 0.4 °C/W, and AEC-Q101 qualification for under-hood automotive use.
Technical Context
This device employs trench-gate silicon technology optimized for low conduction loss and fast switching in high-efficiency power stages. Its gate charge profile (Qg = 305–460 nC) and low Ciss (13975 pF) support operation at frequencies up to several hundred kHz in hard-switched topologies.
The integrated body diode exhibits 50 ns reverse recovery time (TJ = 25°C, IF = 100 A), 59 nC Qrr, and 2.2 A peak reverse recovery current - enabling reliable freewheeling in synchronous buck and half-bridge configurations without external Schottky supplementation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum blocking voltage compatible with 12 V/24 V automotive battery systems and 48 V mild-hybrid architectures. |
| RDS(on) typ. | 0.55 mΩ at VGS = 10 V, TJ = 25°C - Enables <1.5 W conduction loss at 100 A, critical for thermally constrained engine control units. |
| ID (package) | 240 A continuous @ TC = 25°C - Supports high-current motor drives and starter-generator inverters using standard PCB-mount heatsinking. |
| EAS | 1485 mJ single-pulse avalanche energy - Allows unclamped inductive switching in fault-tolerant automotive power stages without snubbers. |
| RθJC | 0.4 °C/W - Enables direct thermal coupling to cold plates or chassis, supporting >1 kW power density in compact modules. |
| Qg | 305–460 nC - Matches gate drivers with ≥2 A peak output (e.g., Infineon 1EDN7512B) for <150 ns turn-on delay and <150 ns fall time. |
| VGS(th) | 2.2–3.9 V - Ensures robust turn-on with 3.3 V or 5 V logic-level controllers, eliminating need for level-shifting in MCU-based gate drive. |
Pinout & Package
Package: D2PAK-7L (TO-263-7), surface-mount, isolated heat slug, 7-pin configuration with 3 parallel source pins, 2 parallel drain pins, and dedicated Kelvin source (SK) for accurate gate drive referencing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (S) | Source (main) | Three paralleled low-inductance source terminals reduce conduction loss and improve current sharing in high-frequency PWM. |
| 4 (SK) | Kelvin Source | Provides remote sense path for gate driver feedback, eliminating source inductance impact on switching timing and stability. |
| 5, 6 (D) | Drain (main) | Two paralleled drain terminals minimize loop inductance in high-di/dt applications such as starter solenoid drivers. |
| 7 (G) | Gate | Standard gate terminal; internal RG = 2.2 Ω enables predictable Miller-effect control without external gate resistors in most designs. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature range (−55°C to +175°C) and mechanical shock/vibration per JESD22 standards. |
| Ultra-low RDS(on) | 0.55 mΩ typ. reduces I²R losses by >30% vs. legacy 40 V MOSFETs, directly improving efficiency in 12 V starter-alternator systems. |
| Enhanced avalanche ruggedness | 1485 mJ EAS rating allows safe operation during load dump transients and short-circuit events without derating. |
| Optimized body diode | 50 ns trr and 59 nC Qrr enable zero-voltage switching (ZVS) in resonant LLC converters targeting >97% efficiency. |
| D2PAK-7L package | 7-pin layout separates power and sensing paths, reducing gate oscillation and enabling stable operation at >500 kHz switching frequency. |
Applications
| Automotive Starter-Generator Inverter | 48 V Mild-Hybrid DC-DC Converter |
|---|---|
Use Scenario: High-current bidirectional power conversion between 12 V battery and 48 V bus in P0/P1 hybrid architectures. IC Role / Device Role / Timing Role: Primary high-side switch in interleaved synchronous buck-boost stage, operating at 100–200 kHz with 100–200 A peak current. Use Value: 0.55 mΩ RDS(on) cuts conduction loss by 4.2 W per device vs. 0.85 mΩ alternatives, enabling 200 W higher output power within same thermal envelope. |
Use Scenario: Step-down conversion from 48 V bus to 12 V subsystems (e.g., ADAS cameras, infotainment). IC Role / Device Role / Timing Role: Low-side synchronous rectifier in dual-phase buck converter, handling 150 A continuous with forced-air cooling. Use Value: Kelvin source pin eliminates source inductance-induced shoot-through risk, allowing <50 ns dead-time reduction and 0.8% efficiency gain at full load. |
| Engine Control Unit (ECU) Fuel Injector Driver | Electric Power Steering (EPS) Motor Phase Leg |
Use Scenario: High-speed switching of solenoid injectors requiring precise 1–5 ms pulse width control and >10 A peak current. IC Role / Device Role / Timing Role: Low-side driver with integrated body diode conducting flyback energy during injector de-energization. Use Value: 50 ns trr ensures clean diode commutation, eliminating voltage spikes >60 V that cause EMI failures in CAN-connected ECUs. |
Use Scenario: Three-phase inverter driving 300–500 W brushless motor in column-assist EPS systems. IC Role / Device Role / Timing Role: Half-bridge leg switch with 240 A package rating supporting 3× overcurrent surge during steering assist peaks. Use Value: 1485 mJ EAS withstands unclamped inductive energy during sudden phase current interruption, preventing latch-up during torque reversal. |
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 |
|---|---|---|---|
| STL220N4F7AG | 40 V, 0.47 mΩ typ. RDS(on), but only 100 A package rating and no Kelvin source. | Lacks Kelvin source and lower current rating limit suitability to high-reliability EPS or starter-generator where precision gate control is mandatory. | Select when cost sensitivity outweighs need for avalanche margin and Kelvin sensing; verify thermal design for >150 A sustained loads. |
| IXFH40N40X3 | 400 V rating, 32 mΩ RDS(on), TO-247 package - incompatible voltage class and 60× higher on-resistance. | Designed for industrial SMPS, not automotive 12/48 V systems; unsuitable due to excessive conduction loss and package thermal mismatch. | Not recommended for AUIRFS8409-7P replacement; only consider if system requires >100 V blocking and can tolerate >10× higher I²R loss. |
Compared with STL220N4F7AG and IXFH40N40X3, the AUIRFS8409-7P uniquely combines automotive-grade reliability, Kelvin-source precision, 240 A package rating, and 0.55 mΩ on-resistance - making it the only viable option for high-power, safety-critical automotive inverters requiring both efficiency and fault tolerance.
Availability
AUIRFS8409-7P is available at Aetrix Electronics and suitable for automotive starter-generator inverters, 48 V mild-hybrid DC-DC converters, engine control unit fuel injector drivers, and electric power steering motor phase legs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AUIRFS8409-7P 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 quality certification to ISO/TS 16949 and AEC-Q200 standards.
This device belongs to Infineon's OptiMOS™ 5 automotive power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching in 12 V, 24 V, and 48 V automotive power systems including electrified drivetrain and ADAS subsystems.
FAQ
Is AUIRFS8409-7P pin-compatible with standard D2PAK-3L MOSFETs?
No. The AUIRFS8409-7P uses a 7-pin D2PAK-7L footprint with dedicated Kelvin source (Pin 4) and dual drain/source terminals. Standard D2PAK-3L layouts lack routing for Pin 4 and cannot accommodate the enhanced thermal and gate-drive performance of this device. PCB redesign is required.
What is the maximum recommended gate resistor value for hard-switched 100 kHz operation?
For 100 kHz hard-switched operation with 10 V gate drive, a 2.2 Ω series gate resistor is recommended to dampen ringing while maintaining <150 ns turn-off delay. This value balances switching loss minimization against gate oscillation risk, as validated in Infineon's AN-1115 application note for D2PAK-7L devices.
Does the body diode support synchronous rectification in continuous conduction mode (CCM)?
Yes. With 50 ns reverse recovery time and 59 nC Qrr at 100 A, the integrated body diode supports synchronous rectification in CCM up to 200 kHz in buck converters. However, optimal performance requires gate timing synchronized to zero-current crossing to avoid cross-conduction losses.
Can AUIRFS8409-7P be used in non-automotive industrial applications?
Yes. While AEC-Q101 qualified, its 40 V rating, 0.55 mΩ RDS(on), and 1485 mJ avalanche energy make it suitable for industrial UPS, server VRMs, and high-current welding inverters. Derating guidelines in Infineon's datasheet Section 7.2 must be followed for non-automotive thermal and lifetime validation.
AUIRFS8409-7P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- HEXFET®
- Package/Case:
- TO-263-7, D2PAK (6 Leads + Tab)
- Packaging:
- Tube
- 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):
- 10V
- Rds On (Max) @ Id, Vgs:
- 0.75mOhm @ 100A, 10V
- Vgs(th) (Max) @ Id:
- 3.9V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 460 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 13975 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:
- D2PAK (7-Lead)
AUIRFS8409-7P FAQ
1.How can I place an order for AUIRFS8409-7P through Aetrix?
Please submit a Request for Quotation (RFQ) for AUIRFS8409-7P 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 AUIRFS8409-7P reliable?
The price and inventory of AUIRFS8409-7P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRFS8409-7P is usually 5 days.
3.What payment methods are accepted for AUIRFS8409-7P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRFS8409-7P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AUIRFS8409-7P?
AUIRFS8409-7P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AUIRFS8409-7P 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 AUIRFS8409-7P?
For technical support, including AUIRFS8409-7P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRFS8409-7P requirements.
6.How does Aetrix verify that AUIRFS8409-7P is sourced from the original manufacturer or authorized distributors?
All AUIRFS8409-7P 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 AUIRFS8409-7P meets industry standards.
7.What is the process for return or replacement of AUIRFS8409-7P?
All AUIRFS8409-7P units undergo pre-shipment inspection (PSI). If there is an issue with AUIRFS8409-7P, 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 AUIRFS8409-7P part is unused and in its original packaging.
Return procedure for AUIRFS8409-7P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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