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Infineon Technologies AUIRFS8408-7P
- Part No.:
- AUIRFS8408-7P
- Manufacturer:
- Infineon Technologies
- Category:
- FETs, MOSFETs
- Package:
- TO-263-7, D2PAK (6 Leads + Tab), TO-263CB
- Datasheet:
-
AUIRFS8408-7P.pdf
- Description:
- MOSFET N-CH 40V 240A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:6,741
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Product details
Overview
AUIRFS8408-7P from Infineon Technologies is an N-channel enhancement-mode HEXFET Power MOSFET in D2PAK-7L package, rated for 40 V VDS, 0.70 mΩ typ. RDS(on), and 240 A continuous drain current (package-limited) at TC = 25°C. It integrates a low-loss body diode and supports high-current synchronous rectification in automotive DC-DC converters.
For engineers reviewing the AUIRFS8408-7P datasheet, AUIRFS8408-7P pinout, AUIRFS8408-7P application, or AUIRFS8408-7P equivalent, key selection criteria include its ultra-low on-resistance, 1300 A pulsed drain capability, avalanche-rated construction, and AEC-Q101 qualification for under-hood power stages.
Technical Context
This MOSFET employs trench-gate silicon technology optimized for high-efficiency, high-current switching in 12 V automotive systems. Its gate threshold voltage (2.2–3.9 V) enables robust drive compatibility with standard 3.3 V/5 V logic controllers and supports fast turn-on with 210 nC total gate charge at VGS = 10 V.
Thermal performance is defined by a junction-to-case thermal resistance of 0.51 °C/W and a maximum junction temperature of +175 °C. The device features a fully characterized body diode with 44 ns reverse recovery time and 43 nC reverse recovery charge at IF = 100 A, enabling reliable operation in hard-switched and synchronous buck topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum blocking voltage compatible with 12 V automotive battery rails including load dump transients. |
| RDS(on) typ. | 0.70 mΩ - Enables <1.5 W conduction loss at 200 A, critical for high-efficiency 48 V/12 V bidirectional DC-DC converters. |
| ID (pkg-limited) | 240 A @ TC = 25°C - Sustained current delivery constrained by D2PAK-7L package thermal and bond-wire limits. |
| Qg | 210 nC - Gate drive energy requirement dictating driver IC selection and switching loss trade-offs at 100–300 kHz. |
| EAS | 501 mJ - Single-pulse avalanche energy rating confirming ruggedness against inductive switching faults in motor drives. |
| VGS(th) | 2.2–3.9 V - Threshold range ensuring reliable turn-on with standard microcontroller GPIOs and minimizing shoot-through risk. |
| trr / Qrr | 44 ns / 43 nC - Fast, low-charge body diode enabling efficient synchronous rectification without external Schottky assist. |
Pinout & Package
The AUIRFS8408-7P uses the D2PAK-7L (TO-263-7) surface-mount package with exposed drain pad for enhanced thermal dissipation. Pin 1–3 and 5–7 are paralleled source terminals; Pin 4 is the gate; the underside thermal pad is electrically connected to the drain.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 5, 6, 7 | Source (S) | Multiple paralleled low-inductance source connections reduce common-source inductance and improve switching stability. |
| 4 | Gate (G) | Single gate input with 2.0 Ω internal gate resistance-enables predictable gate drive timing without external series resistor. |
| Thermal Pad (underside) | Drain (D) | Exposed copper drain pad provides primary thermal path to PCB heatsink; must be soldered to large copper area for RθJC = 0.51 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements including HTOL, TC, and UHAST. |
| Ultra-low RDS(on) | 0.70 mΩ typ. minimizes I²R losses in high-current paths-critical for meeting WLTP efficiency targets in 48 V mild-hybrid systems. |
| 7-pin D2PAK layout | Three-source-pin configuration reduces source inductance by >40% vs. standard D2PAK, suppressing voltage spikes during dI/dt > 500 A/μs. |
| Enhanced body diode | 44 ns trr and soft recovery behavior reduce EMI and eliminate need for snubbers in synchronous rectifier designs. |
| High avalanche ruggedness | 501 mJ EAS supports unclamped inductive switching in motor gate drivers and solenoid control without external clamping. |
Applications
| Automotive DC-DC Converters | Electric Power Steering (EPS) |
|---|---|
|
Use Scenario: High-current bidirectional 48 V/12 V DC-DC converter in mild-hybrid vehicles. IC Role / Device Role / Timing Role: Primary high-side synchronous rectifier switch operating at 200–300 kHz with 100–200 A RMS current. Use Value: 0.70 mΩ RDS(on) cuts conduction loss by 35% vs. legacy 1.2 mΩ devices, directly improving system efficiency by 1.2% at full load. |
Use Scenario: Three-phase inverter driving brushless EPS motor with peak currents up to 180 A. IC Role / Device Role / Timing Role: Low-side power switch handling high dI/dt commutation with integrated body diode freewheeling. Use Value: 44 ns trr and 2.7 V/ns dv/dt immunity prevent false turn-on and reduce gate driver stress during PWM edge transitions. |
| On-Board Charger (OBC) Output Stage | 12 V Battery Backup Systems |
|
Use Scenario: Secondary-side synchronous rectification in 6.6 kW OBC AC/DC stage feeding 400 V battery bus. IC Role / Device Role / Timing Role: High-current output switch in LLC resonant converter secondary, conducting >150 A average current. Use Value: 240 A package-limited current and 0.51 °C/W RθJC enable direct mounting to aluminum heatsink, eliminating thermal interface material. |
Use Scenario: Load switch and fault protection in 12 V backup power path for ADAS domain controllers. IC Role / Device Role / Timing Role: Always-on high-side switch with fast overcurrent response and integrated avalanche energy absorption. Use Value: 501 mJ EAS withstands inductive kickback from solenoid loads during emergency shutdown without external TVS. |
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 |
|---|---|---|---|
| STL220N4F7AG | 40 V, 0.55 mΩ typ., DFN8 5x6 mm package, no exposed drain pad | Limited to ≤120 A due to smaller thermal footprint; unsuitable for >150 A continuous operation | Prefer for space-constrained PCB layouts where thermal mass is managed via multilayer copper, not heatsinking. |
| IXTH300N04S5 | 40 V, 0.85 mΩ typ., TO-247-3L, higher Qg (270 nC), no AEC-Q101 | Higher switching loss and non-automotive qualification limit use to industrial UPS or solar inverters | Choose only when mechanical mounting requires through-hole package and automotive qualification is unnecessary. |
Compared with STL220N4F7AG and IXTH300N04S5, the AUIRFS8408-7P uniquely balances ultra-low RDS(on), AEC-Q101 compliance, and D2PAK-7L's high-current source routing-making it the only option validated for production 48 V automotive power stages requiring >200 A continuous conduction.
Availability
AUIRFS8408-7P is available at Aetrix Electronics and suitable for automotive DC-DC converters, electric power steering systems, and on-board chargers requiring stable component supply across multi-year vehicle production cycles.
Supply support for AUIRFS8408-7P 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 aligned to IATF 16949.
The AUIRFS8408-7P belongs to Infineon's automotive-qualified OptiMOS™ 5 family, engineered specifically for high-efficiency, high-reliability 12 V and 48 V automotive power conversion applications.
FAQ
Is AUIRFS8408-7P pin-compatible with standard D2PAK-3L MOSFETs?
No. The AUIRFS8408-7P uses a 7-pin D2PAK-7L footprint with three dedicated source pins (1, 2, 3) and three additional source pins (5, 6, 7), plus one gate pin (4). Standard D2PAK-3L has only three pins (G, D, S) and is physically incompatible-PCB layout and stencil must be redesigned.
What is the maximum recommended gate drive voltage for AUIRFS8408-7P?
The absolute maximum gate-to-source voltage is ±20 V, but Infineon specifies 10 V as the nominal drive level for full RDS(on) specification and optimal switching performance. Driving above 15 V yields diminishing RDS(on) improvement while increasing gate oxide stress and ESD vulnerability.
Does AUIRFS8408-7P require external gate resistors in automotive applications?
Yes-although the device includes 2.0 Ω internal gate resistance, an external 2.2–4.7 Ω series resistor is recommended to dampen gate ringing caused by PCB trace inductance and ensure controlled dV/dt during turn-on/off, especially in high-noise engine-bay environments.
Can AUIRFS8408-7P replace older IRFS8408 variants in existing designs?
Yes-AUIRFS8408-7P is the automotive-grade (AEC-Q101) successor to IRFS8408, sharing identical pinout, electrical specs, and thermal characteristics. Key improvements include tighter RDS(on) distribution and enhanced avalanche testing, allowing drop-in replacement in qualified automotive hardware.
AUIRFS8408-7P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- HEXFET®
- Package/Case:
- TO-263-7, D2PAK (6 Leads + Tab), TO-263CB
- 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:
- 1mOhm @ 100A, 10V
- Vgs(th) (Max) @ Id:
- 3.9V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 315 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 10250 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 294W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TO263-7-900
AUIRFS8408-7P FAQ
1.How can I place an order for AUIRFS8408-7P through Aetrix?
Please submit a Request for Quotation (RFQ) for AUIRFS8408-7P 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 AUIRFS8408-7P reliable?
The price and inventory of AUIRFS8408-7P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRFS8408-7P is usually 5 days.
3.What payment methods are accepted for AUIRFS8408-7P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRFS8408-7P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AUIRFS8408-7P?
AUIRFS8408-7P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AUIRFS8408-7P 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 AUIRFS8408-7P?
For technical support, including AUIRFS8408-7P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRFS8408-7P requirements.
6.How does Aetrix verify that AUIRFS8408-7P is sourced from the original manufacturer or authorized distributors?
All AUIRFS8408-7P 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 AUIRFS8408-7P meets industry standards.
7.What is the process for return or replacement of AUIRFS8408-7P?
All AUIRFS8408-7P units undergo pre-shipment inspection (PSI). If there is an issue with AUIRFS8408-7P, 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 AUIRFS8408-7P part is unused and in its original packaging.
Return procedure for AUIRFS8408-7P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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