International Rectifier AUIPS1021STRL

Overview

AUIPS1021STRL from International Rectifier is an automotive-grade intelligent power low-side switch designed for protected switching of resistive and inductive loads in 12 V automotive and industrial control systems. The device integrates a low-side N-channel power MOSFET with over-current shutdown, over-temperature shutdown, ESD protection, drain-to-source active clamp, and diagnostic capability through the input current path.

As part of the AUIPS1021 intelligent power switch family, AUIPS1021STRL is supplied as the D²Pak / TO-263 surface-mount tape-and-reel ordering option. For engineers reviewing the AUIPS1021STRL datasheet, AUIPS1021STRL pinout, AUIPS1021STRL application, or AUIPS1021STRL equivalent, this device is commonly used in automotive load switching, relay and solenoid control, lamp control, inductive actuator switching, and protected low-side power distribution circuits.

Technical Context

In a typical low-side switch circuit, AUIPS1021STRL connects between the load and ground. The load is connected to the battery or supply rail, while the AUIPS1021STRL drain switches the low-side return path. A logic-level input controls the internal MOSFET, making the device suitable for MCU, control IC, or driver-based on/off switching where load protection is required.

The device is designed for harsh electrical environments where discrete MOSFETs may require additional protection circuitry. When the junction temperature exceeds the shutdown threshold or when drain current reaches the over-current threshold, the AUIPS1021STRL turns off the MOSFET and latches the protection condition until the input is cycled. This behavior helps protect wiring, loads, and the switching device during short-circuit or overload events.

The active clamp function improves inductive-load demagnetization capability by clamping the drain-to-source voltage during turn-off. This is useful for solenoids, relays, small motors, and other inductive loads where stored magnetic energy must be handled without adding a large number of external suppression components.

Key Specifications

Pinout & Package

The AUIPS1021STRL pinout uses a simple three-terminal intelligent switch structure. Pin 1 is the logic input, Pin 2 and the tab are drain, and Pin 3 is source. This arrangement allows the device to replace a discrete low-side MOSFET in many load-switching circuits while adding integrated fault protection and active clamp behavior.

For PCB design, the drain and tab copper area should be sized for current and thermal dissipation, while the source connection should provide a low-impedance return path. The input trace should be routed away from high-current switching nodes, and the recommended input series resistor can be used to support diagnostic current detection and reduce stress on the control signal path.

Key Features

• Automotive-grade intelligent power low-side switch for protected load control.
• Integrated N-channel power MOSFET with low on-state resistance.
• Over-current shutdown protects the switch and load path during overload or short-circuit conditions.
• Over-temperature shutdown turns off the internal MOSFET when junction temperature exceeds the protection threshold.
• Drain-to-source active clamp supports inductive-load demagnetization during turn-off.
• Low-current logic-level input simplifies connection to control electronics.
• Diagnostic capability through input current when a suitable series resistor is used.
• Optimized turn-on and turn-off behavior helps reduce EMI in switched-load applications.
• ESD protection and automotive qualification support use in harsh vehicle and industrial environments.
• D²Pak surface-mount package supports automated assembly and thermal copper spreading.

Applications

Equivalent & Alternatives

When evaluating AUIPS1021STRL equivalent devices, engineers should compare low-side or high-side topology, package type, pinout, RDS(on), current capability, shutdown threshold, active clamp rating, diagnostic method, thermal footprint, automotive qualification, and tape-and-reel orientation.

Compared with AUIPS1021S and AUIPS1021STRR, AUIPS1021STRL mainly differs by ordering and tape-and-reel orientation rather than the core low-side switch function. AUIPS1021STRL vs AUIPS1021R selection depends on board footprint, thermal copper area, current requirement, assembly method, and whether the design requires D²Pak or D-Pak packaging.

Quality

AUIPS1021STRL should be sourced as original International Rectifier / Infineon automotive-grade components through traceable and controlled supply channels. Quality verification may include package inspection, top-mark validation, reel-label review, moisture-sensitivity control, solderability inspection, electrical screening, and incoming quality control according to automotive or industrial production requirements.

Because the device switches load current in protected low-side circuits, PCB copper area, thermal design, source grounding, drain-tab heat spreading, inductive-load energy, control input timing, and fault-reset behavior should be validated in the final system. Traceable sourcing helps reduce counterfeit risk and supports repeatable performance in repair, maintenance, and production programs.

Availability

AUIPS1021STRL available at Aetrix Electronics and suitable for automotive low-side switching, protected load-driver outputs, inductive actuator control, relay and solenoid switching, and 12 V power distribution circuits requiring stable component supply and replacement support.

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

For production or repair deployment, confirming package type, reel orientation, lifecycle status, automotive qualification, electrical rating, load profile, thermal condition, and sourcing continuity helps reduce procurement risk and improve manufacturing stability.

Manufacturer

International Rectifier was a semiconductor manufacturer specializing in power management, power MOSFETs, IGBTs, gate drivers, and power-control components. International Rectifier products became part of Infineon Technologies' power semiconductor portfolio after the acquisition of International Rectifier.

The AUIPS1021 family belongs to the intelligent power switch product category and is designed for automotive-grade protected load switching. AUIPS1021STRL provides integrated MOSFET switching, over-current shutdown, over-temperature shutdown, ESD protection, active clamp, and input-current diagnostic functionality in a surface-mount package.

FAQ

What is AUIPS1021STRL used for?

AUIPS1021STRL is used for protected low-side switching of automotive and industrial loads such as relays, solenoids, lamps, small motors, actuators, and controlled power-distribution outputs.

Where can I find the AUIPS1021STRL datasheet download?

The AUIPS1021STRL datasheet is available as AUIPS1021 technical documentation and includes product summary, protection behavior, electrical ratings, lead assignments, thermal data, package information, and ordering details.

What should be considered in AUIPS1021STRL pinout design?

Pinout design should confirm Pin 1 as IN, Pin 2 and tab as Drain, and Pin 3 as Source. The drain/tab copper area, source return path, input resistor, inductive-load energy, and thermal footprint should be checked during PCB layout.

Does AUIPS1021STRL support inductive loads?

Yes. AUIPS1021STRL includes drain-to-source active clamp functionality, which helps handle inductive-load demagnetization during turn-off. Final suitability depends on load current, inductance, switching frequency, thermal design, and clamp-energy conditions.

What are common AUIPS1021STRL equivalent solutions?

Common equivalent or alternative directions include AUIPS1021S, AUIPS1021STRR, AUIPS1021R, AUIPS1021RTR, and AUIPS1021 through-hole variants. Final selection must confirm package, footprint, reel orientation, thermal rating, current capability, and protection behavior.