Infineon Technologies AUIRF3805L

Overview

AUIRF3805L from International Rectifier is a automotive-qualified N-channel power MOSFET for switching, load-control, and power-conversion circuits supplied in the TO-262-3 Long Leads, I2PAK, TO-262AA package. The device is intended for discrete power switching where board designers need a defined MOSFET package, gate-control interface, drain-source current path, and thermal path.

For engineers reviewing the AUIRF3805L datasheet, AUIRF3805L pinout, AUIRF3805L application, or AUIRF3805L equivalent, this device is commonly used in automotive load switching, motor control, relay and solenoid switching, DC-DC converter stages, battery power paths, and legacy power-board replacement. Selection should focus on channel polarity, drain-source voltage, continuous and pulsed current, RDS(on), gate charge, body-diode behavior, package thermal resistance, and footprint compatibility.

Technical Context

In circuit use, AUIRF3805L serves as the main discrete switching element between the supply, load, or converter node and the power return or power rail.

The gate driver should be selected from the required gate voltage, total gate charge, switching speed, and EMI target. RDS(on), pulsed current, avalanche capability, and body-diode recovery define practical load and converter limits.

The I²Pak / TO-262 package determines the board footprint, heat-spreading path, and current terminal arrangement. For replacement work, the package and pinout should be confirmed before assuming interchangeability with another IRF or AUIRF suffix.

Key Specifications

Pinout & Package

The AUIRF3805L pinout should be checked together with the TO-262-3 Long Leads, I2PAK, TO-262AA outline, because terminal arrangement and thermal connection affect layout, replacement approval, and assembly method.

For PCB design, keep the high-current power path short, route the gate or control line away from noisy switching nodes, and size copper or heatsinking for the real load current and duty cycle. I²Pak long-lead power package for board-mounted switching stages requiring higher current paths than small SMD packages.

Key Features

• AUIRF3805L is a N-channel power MOSFET for power switching, load control, and converter-stage use.
• I²Pak / TO-262 package affects footprint compatibility, thermal impedance, and assembly method.
• Low RDS(on), gate charge, and package thermal resistance are the main parameters for efficiency and temperature rise.
• Body-diode behavior and avalanche capability support inductive-load and synchronous-switching design checks.
• Can be driven from an external gate driver, controller, or logic stage when gate-drive voltage and timing are validated.
• Suitable for BOM continuation and replacement projects when footprint, pinout, and electrical ratings match the original board.

Applications

Equivalent & Alternatives

When evaluating AUIRF3805L equivalent devices, engineers should compare only specific orderable part numbers and verify package footprint, pinout, voltage rating, current rating, thermal resistance, switching behavior, qualification status, and suffix or packing requirements before substitution.

Compared with related alternatives, AUIRF3805L should remain the preferred sourcing reference when the existing BOM, PCB footprint, and qualification documentation require the exact International Rectifier orderable device.

Quality

AUIRF3805L should be sourced as original International Rectifier / Infineon inventory through traceable and controlled supply channels. Quality verification may include package inspection, top-mark validation, label and lot review, solderability inspection, moisture-sensitivity handling review, and electrical screening according to the target production requirement.

Because AUIRF3805L is used in power switching circuits, final validation should include the actual PCB footprint, thermal path, electrical stress, operating temperature, switching frequency, and fault-condition behavior. Traceable sourcing helps reduce counterfeit risk and supports repeatable performance in production, repair, and maintenance programs.

Availability

AUIRF3805L available at Aetrix Electronics and suitable for power switching, power-conversion, motor-control, load-driver, repair, and BOM-continuity applications requiring stable component supply and controlled replacement planning.

Supply support may include scheduled delivery planning, volume procurement support, BOM continuity assistance, traceable sourcing management, and long-term availability support for OEM manufacturers, repair programs, and electronics production teams.

For production or repair deployment, confirming package type, orderable suffix, lifecycle status, environmental requirement, electrical rating, thermal condition, and sourcing continuity helps reduce procurement risk and improve manufacturing stability.

Manufacturer

International Rectifier was a semiconductor manufacturer known for power MOSFETs, IGBTs, gate drivers, power-management ICs, intelligent power switches, photovoltaic relays, and power modules. International Rectifier products became part of Infineon Technologies' power semiconductor portfolio after the acquisition of International Rectifier.

The AUIRF3805L ordering line should be reviewed with the relevant International Rectifier legacy product family and current Infineon supply-chain references where available. This is especially important for legacy MOSFETs, IGBT devices, power modules, and automotive AUIR power devices.

FAQ

What is AUIRF3805L used for?

AUIRF3805L is used in MOSFET switching circuits such as load control, motor drive auxiliaries, DC-DC converter stages, battery power paths, and legacy power boards where its package and ratings match the design.

Where can I find the AUIRF3805L datasheet download?

The AUIRF3805L datasheet download is typically available from International Rectifier / Infineon documentation sources or authorized distributor documentation libraries. Use it to confirm ratings, package information, pinout, thermal data, and test conditions.

What should be considered in AUIRF3805L pinout design?

AUIRF3805L pinout design should confirm the package drawing, terminal functions, thermal path, high-current routing, gate or control routing, and whether the orderable suffix changes package or packing details.

Can AUIRF3805L be used as a direct replacement?

AUIRF3805L can be used as a direct replacement only when the package footprint, pinout, electrical ratings, thermal behavior, and qualification status match the original design.

What are common AUIRF3805L equivalent solutions?

Common AUIRF3805L equivalent directions include AUIRFSL6535, AUIRF1405ZL-308, AUIRFSL8408, AUIRFSL3206. Final selection must confirm package, footprint, voltage rating, current rating, thermal performance, and switching behavior.