Infineon Technologies AUIRL1404S

Overview

AUIRL1404S from International Rectifier is a automotive-qualified logic-level N-channel power MOSFET for switching, load-control, and power-conversion circuits supplied in the TO-252-3, DPAK (2 Leads + Tab), SC-63 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 AUIRL1404S datasheet, AUIRL1404S pinout, AUIRL1404S application, or AUIRL1404S 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, AUIRL1404S supports lower-voltage gate-drive control than standard gate-drive MOSFET families, which is useful when the control signal comes from a microcontroller, low-voltage driver, or logic rail.

Logic-level operation does not remove the need to review RDS(on) at the actual gate voltage. Thermal rise, pulsed current, and avalanche stress still determine safe load-current capability.

The DPAK / TO-252 package affects both footprint compatibility and heat spreading, so the same electrical die may behave differently in DPAK, D²Pak, IPAK, I²Pak, TO-220, or DirectFET versions.

Key Specifications

Pinout & Package

The AUIRL1404S pinout should be checked together with the TO-252-3, DPAK (2 Leads + Tab), SC-63 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. DPAK surface-mount power package for compact load switching with PCB copper thermal dissipation.

Key Features

• AUIRL1404S is a N-channel power MOSFET for power switching, load control, and converter-stage use.
• DPAK / TO-252 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 AUIRL1404S 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, AUIRL1404S should remain the preferred sourcing reference when the existing BOM, PCB footprint, and qualification documentation require the exact International Rectifier orderable device.

Quality

AUIRL1404S 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 AUIRL1404S 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

AUIRL1404S 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 AUIRL1404S 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 AUIRL1404S used for?

AUIRL1404S 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 AUIRL1404S datasheet download?

The AUIRL1404S 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 AUIRL1404S pinout design?

AUIRL1404S 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 AUIRL1404S be used as a direct replacement?

AUIRL1404S 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 AUIRL1404S equivalent solutions?

Common AUIRL1404S equivalent directions include AUIRF1404, AUIRF1404S, AUIRF1404ZS, AUIRF1404ZSTRL. Final selection must confirm package, footprint, voltage rating, current rating, thermal performance, and switching behavior.