AUIPS1021R Equivalent & Substitute Parts

Part Overview

The AUIPS1021R is an N-Channel power switch/driver manufactured by Infineon Technologies, designed for general-purpose low-side switching applications. This device operates with a 1:1 input-to-output ratio and delivers up to 4.3A output current at a maximum load voltage of 36V. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. All substitute parts listed maintain the same functional topology (1:1 N-Channel low-side configuration) while offering variations in current capacity, voltage rating, and on-resistance characteristics.

Key Parameters

Parameter	AUIPS1021R
Manufacturer	Infineon Technologies
Category	Power Management (PMIC)
Switch Type	General Purpose
Output Configuration	Low Side, N-Channel, 1:1
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Voltage - Load (Max)	36V
Current - Output (Max)	4.3A
Rds On (Typ)	20mOhm
Fault Protection	Current Limiting (Fixed), Over Temperature
Operating Temperature	-40°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Product Status	Obsolete
Grade	Automotive
Qualification	AEC-Q100

Substitute Part Grouping Explanation

Substitution of the AUIPS1021R is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Criteria:

Output configuration must remain low-side, N-Channel, 1:1 topology
Package must be TO-252-3 DPAK (2 Leads + Tab) for PCB compatibility
Operating temperature range must support -40°C ~ 150°C (TJ)
Mounting type must be surface mount
Interface must be On/Off control (non-inverting input)

Acceptable Parameter Variations:

Load voltage rating may exceed 36V (higher ratings are backward compatible)
Output current capacity may be lower or higher than 4.3A depending on application requirements
On-resistance (Rds On) may vary; lower values indicate improved performance
Fault protection features may be enhanced (additional over-voltage protection is acceptable)
Product status may transition from obsolete to active (preferred for new designs)

All substitute parts listed are manufactured by Infineon Technologies and maintain the same functional architecture, ensuring direct pin-compatible replacement in existing designs.

Parameter Comparison

Part Number	Product Status	Voltage - Load (Max)	Current - Output (Max)	Rds On (Typ)	Fault Protection	RoHS Status
AUIPS1021R	Obsolete	36V	4.3A	20mOhm	Current Limiting (Fixed), Over Temperature	Not Specified
BTS118DATMA1	Active	42V	2.4A	70mOhm	Current Limiting (Fixed), Over Temperature, Over Voltage	ROHS3 Compliant
BTS134DATMA1	Active	42V	3.5A	35mOhm	Current Limiting (Fixed), Over Temperature, Over Voltage	ROHS3 Compliant
BTS142DATMA1	Active	42V	4.6A	23mOhm	Current Limiting (Fixed), Over Temperature, Over Voltage	ROHS3 Compliant
BTS3028SDLATMA1	Active	60V	5A	28mOhm	Current Limiting (Fixed), Over Temperature, Over Voltage	ROHS3 Compliant
BTS3104SDLATMA1	Active	60V	2A	104mOhm	Current Limiting (Fixed), Over Temperature, Over Voltage	ROHS3 Compliant
BTS3118DATMA1	Active	42V	2.4A	70mOhm	Current Limiting (Fixed), Over Temperature, Over Voltage	ROHS3 Compliant
BTS3142DATMA1	Active	42V	4.6A	23mOhm	Current Limiting (Fixed), Over Temperature, Over Voltage	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Highest Compatibility): BTS142DATMA1 and BTS3142DATMA1 provide the closest electrical match to the AUIPS1021R. Both deliver 4.6A output current (exceeding the original 4.3A specification) with 23mOhm on-resistance (comparable to the original 20mOhm). Both parts are active products with ROHS3 compliance and enhanced fault protection including over-voltage detection. These parts are suitable for designs requiring current capacity at or near the original specification.

For Higher Voltage Applications: BTS3028SDLATMA1 supports 60V load voltage (compared to the original 36V) while delivering 5A output current. This part is appropriate for applications requiring extended voltage headroom or higher current capacity. The 28mOhm on-resistance remains efficient for power dissipation management.

For Lower Current Applications: BTS118DATMA1 and BTS3118DATMA1 are suitable for designs requiring only 2.4A output current. Both support 42V load voltage and include enhanced fault protection. These parts reduce thermal dissipation in current-limited applications.

For Reduced Current Designs: BTS3104SDLATMA1 supports 60V load voltage with 2A output current capacity. This part is appropriate for low-current switching applications where voltage margin is prioritized.

For Intermediate Current Requirements: BTS134DATMA1 delivers 3.5A output current at 42V load voltage with 35mOhm on-resistance, providing a middle-ground option between lower and higher current specifications.

All substitute parts are active products with ROHS3 compliance, ensuring long-term availability and regulatory compliance for new designs. The AUIPS1021R's automotive grade (AEC-Q100) qualification is not explicitly carried forward in the substitute parts listed; designs requiring automotive qualification should verify compliance documentation with the manufacturer.

Frequently Asked Questions (FAQ)

Q: Can BTS142DATMA1 directly replace AUIPS1021R in existing PCB designs? A: Yes. BTS142DATMA1 maintains identical TO-252-3 DPAK packaging, pin configuration, and functional topology (1:1 N-Channel low-side). The part is pin-compatible and electrically suitable for designs operating at or below 4.3A output current and 36V load voltage. No PCB modifications are required.

Q: What is the difference between BTS142DATMA1 and BTS3142DATMA1? A: Both parts deliver identical electrical specifications (4.6A, 42V, 23mOhm). The primary difference is packaging format: BTS142DATMA1 is supplied in Tape & Reel (TR), while BTS3142DATMA1 is also supplied in Tape & Reel (TR). Both are active products with ROHS3 compliance. Selection depends on procurement and assembly requirements.

Q: Why do substitute parts have higher voltage ratings (42V or 60V) than the original 36V? A: Higher voltage ratings provide design margin and flexibility for applications with transient overvoltage conditions or future design iterations. A 42V or 60V rated device operates safely at 36V load voltage. This is a standard engineering practice and does not compromise performance or reliability.

Q: Are all substitute parts automotive-grade? A: The substitute parts listed do not explicitly specify automotive grade or AEC-Q100 qualification in the provided data. Designs requiring automotive qualification should verify compliance documentation directly with Infineon Technologies before selection.

Q: What does "1:1" ratio mean in the output configuration? A: The 1:1 ratio indicates a single input control signal drives a single output switch. This is the standard topology for general-purpose power switches and is maintained across all substitute parts.

Q: Can I use BTS3104SDLATMA1 if my application requires 4.3A output current? A: No. BTS3104SDLATMA1 is rated for maximum 2A output current, which is insufficient for applications requiring 4.3A. Select BTS142DATMA1, BTS3142DATMA1, or BTS3028SDLATMA1 for adequate current capacity.

Q: What is the significance of the "HITFET®" series designation on substitute parts? A: HITFET® is Infineon's high-current, low on-resistance power switch technology platform. All substitute parts belong to this series, indicating they share common design architecture and performance characteristics optimized for efficient switching applications.

Q: Do substitute parts include over-voltage protection? A: Yes. All substitute parts include over-voltage fault protection in addition to current limiting and over-temperature protection. The original AUIPS1021R includes only current limiting and over-temperature protection, making the substitutes functionally enhanced in this regard.

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