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

Infineon Technologies AUIRFR3806

Name: AUIRFR3806
Brand: Infineon Technologies
SKU: AUIRFR3806
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRFR3806

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: AUIRFR3806.pdf

Description:: MOSFET N-CH 60V 43A DPAK

Quantity:: RFQ Add To RFQ list

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Inventory:8,488

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Product details

Overview

AUIRFR3806 from Infineon is an automotive-grade N-channel enhancement-mode HEXFET® Power MOSFET in D-Pak (TO-252AA) package, rated for 60 V V_DS, 12.6 mΩ typical R_DS(on) at V_GS = 10 V and I_D = 25 A, with 175°C maximum junction temperature and 24 V/ns di/dt-rated body diode recovery. It serves as a high-efficiency main or synchronous rectifier switch in 12 V automotive power systems including DC-DC converters and motor drivers.

For engineers reviewing the AUIRFR3806 datasheet, AUIRFR3806 pinout, AUIRFR3806 application, or AUIRFR3806 equivalent, key selection criteria include its 43 A continuous drain current at T_C = 25°C, 7.1 mJ repetitive avalanche energy rating, fast 40 ns rise time, and automotive qualification per AEC-Q101 standards - all critical for under-hood switching reliability.

Technical Context

This MOSFET employs advanced planar silicon processing to achieve ultra-low on-resistance density and robust dynamic dV/dt immunity. Its gate threshold voltage (2.0–4.0 V) and 0.79 Ω internal gate resistance support stable drive with standard 10 V logic-level controllers.

The device integrates a thermally optimized D-Pak package with low 2.12 °C/W R_θJC, enabling high-power operation without heatsink in many automotive applications. Its body diode exhibits 22–39 ns reverse recovery time and 17–36 nC Q_rr across temperature, supporting efficient synchronous rectification in buck and half-bridge topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	60 V - Withstands transients up to ISO 7637-2 Pulse 5a (clamped 58 V), suitable for 12 V automotive battery rail.
R_DS(on) typ.	12.6 mΩ @ V_GS = 10 V, I_D = 25 A - Enables ≤0.8 W conduction loss at 25 A, reducing thermal load in compact modules.
I_D cont. @ T_C = 25°C	43 A - Supports high-current loads such as radiator fan or EPS motor drivers without parallel devices.
E_AR	7.1 mJ - Allows safe repetitive inductive turn-off events in unclamped switching (e.g., solenoid control) up to T_Jmax.
tr / tf	40 ns / 47 ns - Minimizes switching losses in 100–500 kHz DC-DC converters while maintaining EMI control.
T_J max	+175°C - Certified for under-hood environments including engine control units and transmission control modules.
Q_g	22 nC typ. - Compatible with low-power gate drivers (e.g., Infineon 2EDN series) without external boost circuitry.

Pinout & Package

D-Pak (TO-252AA) package with exposed drain pad for thermal and electrical connection; surface-mount construction with 1.6 mm creepage distance and 300°C soldering tolerance for 10 seconds.

Pin/Terminal	Circuit Role	Design Meaning
Drain (D)	Main power output terminal	Connected to exposed copper pad - must be soldered to large PCB copper area for thermal dissipation and low-inductance return path.
Source (S)	Power return reference node	Serves as common source for gate drive loop; low-inductance layout critical to prevent shoot-through during fast switching.
Gate (G)	Control input	High-impedance MOS gate requiring <100 nA leakage drive; sensitive to ESD - requires series resistor (20–47 Ω) and local decoupling.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q101 qualified - validated for temperature cycling, humidity, mechanical shock, and lifetime reliability in automotive power systems.
Repetitive avalanche capability	7.1 mJ E_AR - Enables robust operation in inductive load switching without external snubbers or clamps.
Dynamic dV/dt rating	24 V/ns - Prevents false turn-on during high-slew-rate transients in noisy under-hood environments.
Fast body diode recovery	22 ns t_rr @ T_J = 25°C - Reduces reverse recovery loss and EMI in synchronous rectifier configurations.
Lead-free & RoHS compliant	Meets EU Directive 2011/65/EU - compatible with lead-free reflow profiles and industrial recycling requirements.

Applications

Engine Control Unit (ECU) Fuel Injector Driver

Automotive DC-DC Converter (12 V → 5 V/3.3 V)

Use Scenario: High-speed switching of solenoid-based fuel injectors in gasoline direct injection systems.

IC Role / Device Role / Timing Role: Main power switch controlling injector coil current with precise 1–5 ms pulse width modulation.

Use Value: 43 A peak current handling and 175°C operation ensure reliable actuation across cold-start to full-load thermal conditions.

Use Scenario: Synchronous rectification stage in isolated or non-isolated buck converters powering infotainment and ADAS subsystems.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier operating at 250–500 kHz with gate driven by controller's complementary output.

Use Value: 12.6 mΩ R_DS(on) reduces conduction loss by >40% vs. Schottky diodes, improving efficiency from 88% to 93% at 10 A load.

Electric Power Steering (EPS) Motor Phase Switch

Automotive HVAC Blower Motor Controller

Use Scenario: Half-bridge leg in three-phase inverter driving brushless DC motor for steering assist torque generation.

IC Role / Device Role / Timing Role: High-side or low-side switching element with fast 40 ns rise time enabling precise PWM timing and torque ripple suppression.

Use Value: 24 V/ns dV/dt immunity prevents spurious turn-on during cross-conduction, critical for functional safety compliance (ISO 26262 ASIL-B).

Use Scenario: PWM-controlled power stage regulating airflow in cabin HVAC system using brushed DC blower motor.

IC Role / Device Role / Timing Role: Single-ended switch modulating motor voltage between 0–14 V at 20–100 Hz for variable speed control.

Use Value: 71 W P_D at T_C = 25°C allows direct PCB mounting without heatsink in space-constrained dashboard assemblies.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N6F7	60 V, 2.2 mΩ R_DS(on), 220 A I_D, PowerFLAT 5x6 package, higher capacitance (C_iss = 4200 pF)	Requires larger gate driver due to 62 nC Q_g; better suited for high-current, lower-frequency (<100 kHz) motor drives	Select when higher current capacity and lower R_DS(on) outweigh switching speed and board space constraints.
ON Semiconductor NTMFS5C670NL	60 V, 5.2 mΩ R_DS(on), 67 A I_D, SO-8FL package, 150°C T_Jmax, no AEC-Q101 certification	Lacks automotive qualification; limited to under-dash or non-safety-critical applications	Choose only for cost-sensitive non-AEC designs where 175°C operation and repetitive avalanche are not required.

Compared with STL220N6F7 and NTMFS5C670NL, the AUIRFR3806 offers balanced performance: lower gate charge than STL220N6F7 enables faster switching with smaller drivers, and AEC-Q101 qualification plus 175°C rating make it uniquely suitable for safety-critical under-hood use cases where the alternatives fall short.

Availability

AUIRFR3806 is available at Aetrix Electronics and suitable for automotive engine control, DC-DC conversion, and motor drive applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing aligned with IATF 16949 practices.

Supply support for AUIRFR3806 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 certifications including IATF 16949 and ISO 9001.

The AUIRFR3806 belongs to Infineon's automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for high-reliability 12 V vehicle subsystems demanding robustness against thermal stress, voltage transients, and mechanical vibration.

FAQ

Is AUIRFR3806 pin-compatible with IRFR3806?

No - AUIRFR3806 is the automotive-qualified version with tighter parametric limits (e.g., 175°C T_Jmax, AEC-Q101 test flow), while IRFR3806 is commercial-grade (150°C, no automotive qualification). Pinout and package are identical, but substitution requires revalidation of thermal and reliability margins.

What is the recommended gate resistor value for AUIRFR3806 in a 250 kHz buck converter?

A 22 Ω series gate resistor is recommended to balance switching speed (40 ns rise time) and ringing suppression. This value limits peak gate current to ~450 mA with a 12 V driver, avoids overshoot on V_GS, and keeps EMI within CISPR 25 Class 5 limits for automotive applications.

Can AUIRFR3806 be used in linear mode (as a pass transistor)?

No - it is not characterized or rated for linear (SOA-limited) operation. The Safe Operating Area curve shows R_DS(on)-limited conduction only up to 100 µs pulses; sustained linear bias risks thermal runaway due to positive temperature coefficient of R_DS(on) above 100°C.

Does AUIRFR3806 require a Kelvin source connection for high-accuracy current sensing?

No - it lacks a dedicated Kelvin source pin. For accurate high-side current sensing, use external shunt resistors or Hall-effect sensors; the standard source pin introduces measurement error due to package inductance (~1.5 nH) and bond wire resistance during fast transient currents.

AUIRFR3806 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 60 V

Current - Continuous Drain (Id) @ 25°C:: 43A (Tc)

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

Rds On (Max) @ Id, Vgs:: 15.8mOhm @ 25A, 10V

Vgs(th) (Max) @ Id:: 4V @ 50µA

Gate Charge (Qg) (Max) @ Vgs:: 30 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1150 pF @ 50 V

FET Feature:: -

Power Dissipation (Max):: 71W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252AA (DPAK)

AUIRFR3806 FAQ

1.How can I place an order for AUIRFR3806 through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRFR3806 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 AUIRFR3806 reliable?

The price and inventory of AUIRFR3806 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRFR3806 is usually 5 days.

3.What payment methods are accepted for AUIRFR3806?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRFR3806 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRFR3806?

AUIRFR3806 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRFR3806 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 AUIRFR3806?

For technical support, including AUIRFR3806 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRFR3806 requirements.

6.How does Aetrix verify that AUIRFR3806 is sourced from the original manufacturer or authorized distributors?

All AUIRFR3806 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 AUIRFR3806 meets industry standards.

7.What is the process for return or replacement of AUIRFR3806?

All AUIRFR3806 units undergo pre-shipment inspection (PSI). If there is an issue with AUIRFR3806, 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 AUIRFR3806 part is unused and in its original packaging.

Return procedure for AUIRFR3806:

1.Submit a request within 90 days.

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

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