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

Infineon Technologies AUIRFB3806

Name: AUIRFB3806
Brand: Infineon Technologies
SKU: AUIRFB3806
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRFB3806

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: AUIRFB3806.pdf

Description:: MOSFET N-CH 60V 43A TO220AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AUIRFB3806 from Infineon Technologies (formerly International Rectifier) is an automotive-qualified AEC-Q101 single N-channel enhancement-mode HEXFET power MOSFET rated for 60 V V_BRDSS, 15.8 mΩ R_DS(on) at V_GS = 10 V, and 43 A continuous drain current at T_C = 25 °C, used as a high-efficiency main switch in 12 V/24 V automotive power distribution modules.

For engineers reviewing the AUIRFB3806 datasheet, AUIRFB3806 pinout, AUIRFB3806 application, or AUIRFB3806 equivalent, key selection criteria include its AEC-Q101 qualification, TO-220AB thermal resistance of 2.12 °C/W, 22.0 nC total gate charge, and suitability for high-side load switching in engine control units and body electronics.

Technical Context

This MOSFET employs planar silicon process technology optimized for ruggedness and low conduction loss in automotive 12 V systems. It features a fully avalanche-rated structure with guaranteed unclamped inductive switching (UIS) capability and operates with gate threshold voltage (V_GS(th)) between 2.0 V and 4.0 V.

The device supports standard logic-level drive (10 V gate drive) and delivers 71 W power dissipation at T_C = 25 °C. Its 6.3 nC gate-drain charge enables fast turn-off with reduced switching losses in PWM-controlled solenoid drivers and DC motor controllers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BRDSS	60 V - Maximum blocking voltage before breakdown; suitable for 24 V nominal automotive systems with 100 V load-dump transients.
R_DS(on) @ V_GS = 10 V	15.8 mΩ - Conduction loss of ≤0.29 W at 43 A; enables compact thermal design in space-constrained ECUs.
I_D @ T_C = 25 °C	43 A - Continuous drain current rating under ideal heatsink conditions; defines maximum steady-state load capacity.
Q_g Typ	22.0 nC - Total gate charge required for full enhancement; determines driver strength requirement for <1 µs switching.
R_th(JC)	2.12 °C/W - Junction-to-case thermal resistance; allows direct mounting to chassis or heatsink without thermal interface material.
Q_gd Typ	6.3 nC - Gate-drain charge governing Miller plateau duration; critical for minimizing shoot-through risk in half-bridge topologies.

Pinout & Package

Supplied in TO-220AB package: insulated tab, through-hole mounting, single-row 3-pin configuration with metal tab electrically connected to drain.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current-carrying terminal, electrically tied to metal tab	Provides low-inductance, high-current path to heatsink; requires electrical isolation if mounted to conductive chassis.
Source	Reference node for gate drive and current return path	Serves as common reference for gate control circuitry and current sensing; must be routed with low impedance for stable switching.
Gate	Control electrode for channel formation	Requires ≥10 V drive for full enhancement; sensitive to ESD; needs series resistor (10–47 Ω) to damp ringing.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive temperature range (−40 °C to +175 °C junction), vibration, and humidity per JESD22 standards.
Fully avalanche rated	Guaranteed UIS capability up to 100 mJ at T_J = 25 °C; protects against inductive kickback in relay/solenoid loads.
Low R_DS(on) × Q_g figure-of-merit	349 mΩ·nC - Balances conduction and switching losses for high-efficiency 10–100 kHz PWM operation.
TO-220AB insulated tab	Creepage/clearance compliant with automotive insulation requirements; eliminates need for isolating washer in most chassis-mount applications.

Applications

Engine Control Unit (ECU) Power Switching

Automotive HVAC Blower Motor Driver

Use Scenario: High-side switching of fuel injector drivers and ignition coil primary circuits in gasoline/diesel ECUs.

IC Role / Device Role / Timing Role: Main power switch handling repetitive 10–20 A pulsed loads at 1–10 kHz with strict SOA compliance.

Use Value: 60 V rating withstands ISO 7637-2 pulse 5a (100 V transient); 2.12 °C/W R_th(JC) maintains T_J < 150 °C under peak load.

Use Scenario: PWM-controlled speed regulation of 24 V blower motors in climate control systems.

IC Role / Device Role / Timing Role: Low-side switching element in half-bridge configuration driving brushed DC motors.

Use Value: 15.8 mΩ R_DS(on) limits conduction loss to <0.5 W at 30 A; 6.3 nC Q_gd ensures clean commutation at 20 kHz.

Body Control Module (BCM) Load Protection

Commercial Vehicle Lighting Control

Use Scenario: Smart high-side switch for rear fog lamps, window lifters, and seat heaters in BCMs.

IC Role / Device Role / Timing Role: Protected load switch with integrated current limiting and thermal shutdown behavior.

Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; 43 A I_D supports multi-load parallel configurations.

Use Scenario: On/off control of LED headlamps and auxiliary lighting in trucks and buses.

IC Role / Device Role / Timing Role: Robust main switch interfacing directly with CAN-based lighting controllers.

Use Value: Fully avalanche-rated structure survives load dump events up to 100 V; TO-220AB mechanical stability resists road vibration.

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
STL220N6F7	60 V, 2.2 mΩ R_DS(on), 200 A I_D, PowerFLAT 8x8 package	Surface-mount only; no through-hole option; higher current but larger footprint	Select when board space permits SMT and higher peak current is needed; not drop-in compatible.
IRF3205PbF	55 V, 8.0 mΩ R_DS(on), 110 A I_D, TO-220AB, non-automotive grade	No AEC-Q101 qualification; lower V_BRDSS; higher ID but wider SOA margin	Acceptable for non-safety-critical 12 V industrial applications where automotive certification is not required.

Compared with STL220N6F7 and IRF3205PbF, AUIRFB3806 uniquely balances AEC-Q101 compliance, 60 V robustness, and TO-220AB through-hole manufacturability-making it optimal for legacy-compatible automotive production lines requiring zero requalification.

Availability

AUIRFB3806 is available at Aetrix Electronics and suitable for engine control units, body control modules, HVAC motor drives, and commercial vehicle lighting systems requiring stable component supply across extended automotive product lifecycles.

Supply support for AUIRFB3806 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 global semiconductor leader specializing in power management, sensor, and automotive ICs, with vertically integrated manufacturing and AEC-Q100/Q101 certified processes.

AUIRFB3806 belongs to Infineon's automotive-qualified HEXFET® power MOSFET product line, designed specifically for high-reliability 12 V/24 V power switching in safety-critical vehicle subsystems.

FAQ

Is AUIRFB3806 pin-compatible with standard TO-220AB N-channel MOSFETs?

Yes, AUIRFB3806 uses standard TO-220AB pinout: Drain on tab, Source on pin 1, Gate on pin 2. Mechanical dimensions and mounting hole positions match JEDEC TO-220AB outline, enabling direct replacement in existing PCB footprints without layout changes.

What is the maximum allowable junction temperature during continuous operation?

The absolute maximum junction temperature is 175 °C per AEC-Q101 stress testing. For continuous operation, derate linearly from 43 A at 25 °C case temperature to 31 A at 100 °C case temperature, ensuring T_J remains ≤150 °C under worst-case ambient and heatsink conditions.

Does AUIRFB3806 require a gate driver IC for automotive microcontroller interfaces?

No-AUIRFB3806 is logic-level compatible with 5 V and 3.3 V MCU GPIOs when used with appropriate gate series resistance (≥22 Ω). However, for >10 kHz PWM or high-side switching, a dedicated gate driver (e.g., IRS2007) improves rise/fall time and reduces shoot-through risk.

How does AUIRFB3806 handle load dump transients in automotive 12 V systems?

AUIRFB3806 withstands ISO 7637-2 Pulse 5a (100 V, 400 ms) due to its 60 V V_BRDSS rating and fully avalanche-rated structure. Its guaranteed UIS energy of 100 mJ at 25 °C provides margin beyond typical 12 V system transients without external clamping diodes.

AUIRFB3806 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-220-3

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:: Through Hole

Supplier Device Package:: TO-220AB

AUIRFB3806 FAQ

1.How can I place an order for AUIRFB3806 through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRFB3806 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 AUIRFB3806 reliable?

The price and inventory of AUIRFB3806 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRFB3806 is usually 5 days.

3.What payment methods are accepted for AUIRFB3806?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRFB3806 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRFB3806?

AUIRFB3806 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRFB3806 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 AUIRFB3806?

For technical support, including AUIRFB3806 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRFB3806 requirements.

6.How does Aetrix verify that AUIRFB3806 is sourced from the original manufacturer or authorized distributors?

All AUIRFB3806 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 AUIRFB3806 meets industry standards.

7.What is the process for return or replacement of AUIRFB3806?

All AUIRFB3806 units undergo pre-shipment inspection (PSI). If there is an issue with AUIRFB3806, 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 AUIRFB3806 part is unused and in its original packaging.

Return procedure for AUIRFB3806:

1.Submit a request within 90 days.

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

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