AUIPS1021S Equivalent & Substitute Parts

Part Overview

The AUIPS1021S is an N-Channel power switch/driver manufactured by Infineon Technologies, designed for general-purpose low-side switching applications. This device features a 1:1 input-to-output ratio with a maximum load voltage of 36V and output current capability of 4.8A in a D2PAK surface mount package.

The AUIPS1021S has reached obsolete product status. Identifying qualified substitute components ensures design continuity and maintains supply chain reliability for applications requiring equivalent switching performance and thermal characteristics.

Substiute Parts

AUIPS1021S

Infineon TechnologiesIn Stock: 1518AUIPS1021S Datasheet

Current PartRFQ

BTS3142DATMA1

Infineon TechnologiesIn Stock: 3567BTS3142DATMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AUIPS1021S is determined by the following critical parameters:

• Output Configuration & Type: Low-side N-Channel switching topology
• Ratio - Input:Output: 1:1 configuration
• Number of Outputs: Single output
• Interface Type: On/Off control
• Input Type: Non-Inverting
• Voltage - Load Rating: Minimum 36V capability
• Current - Output: Minimum 4.8A capability
• Fault Protection: Current limiting and over-temperature protection
• Operating Temperature Range: -40°C to 150°C (TJ)
• Mounting & Package: Surface mount compatibility

The BTS3142DATMA1 qualifies as a manufacturer-recommended substitute. This device maintains equivalent switching topology, protection features, and thermal operating range while offering enhanced voltage rating (42V) and comparable current handling (4.6A) with slightly higher on-resistance (23mOhm vs. 20mOhm).

Parameter Comparison

Engineering Selection Recommendations

The BTS3142DATMA1 is the manufacturer-recommended substitute for the obsolete AUIPS1021S. Both devices are manufactured by Infineon Technologies and maintain identical switching topology, control interface, and thermal operating specifications.

The BTS3142DATMA1 offers the following advantages:

• Active Product Status: Ensures long-term availability and supply chain continuity
• Enhanced Voltage Rating: 42V maximum load voltage provides additional design margin over the 36V specification of the AUIPS1021S
• Additional Protection: Integrated over-voltage fault protection complements the current limiting and over-temperature protection present in both devices
• RoHS3 Compliance: Meets current environmental and regulatory requirements

The BTS3142DATMA1 operates within the same thermal range (-40°C to 150°C junction temperature) and maintains non-inverting input control logic. The slight increase in on-resistance (23mOhm vs. 20mOhm) and marginal reduction in output current rating (4.6A vs. 4.8A) remain within acceptable tolerance for most general-purpose switching applications operating below the 36V load specification of the original device.

Frequently Asked Questions (FAQ)

Q: Can the BTS3142DATMA1 directly replace the AUIPS1021S in existing designs?

A: Yes. Both devices share identical switching topology (low-side N-Channel 1:1), non-inverting control interface, and thermal operating range. The BTS3142DATMA1 is rated for higher load voltage (42V vs. 36V), making it suitable for applications designed around the AUIPS1021S specifications. Pin configuration and package footprint compatibility must be verified for your specific PCB layout.

Q: What is the impact of the higher on-resistance in the BTS3142DATMA1?

A: The BTS3142DATMA1 has a typical on-resistance of 23mOhm compared to 20mOhm in the AUIPS1021S. This 3mOhm difference results in proportionally higher conduction losses. For applications operating at maximum current (4.8A), this represents approximately 0.46mW additional power dissipation. Thermal analysis should confirm this remains within acceptable limits for your application.

Q: Are there package differences between these devices?

A: Yes. The AUIPS1021S uses a D2PAK (TO-263-3) package, while the BTS3142DATMA1 uses a TO-252-3 (DPAK/SC-63) package. These are different footprints and require PCB layout modification. Consult the respective datasheets for pinout and thermal pad specifications.

Q: What additional protection does the BTS3142DATMA1 provide?

A: The BTS3142DATMA1 includes integrated over-voltage fault protection in addition to the current limiting and over-temperature protection found in the AUIPS1021S. This provides enhanced robustness against transient voltage spikes and load dump conditions.

Q: Are both devices suitable for automotive applications?

A: The AUIPS1021S carries automotive grade qualification (AEC-Q100). The BTS3142DATMA1 is part of the HITFET® series and is manufactured to automotive standards. Confirm specific automotive qualification requirements with Infineon Technologies for your application.