IRSF3031L Equivalent & Substitute Parts

Part Overview

The IRSF3031L is an N-Channel power switch driver manufactured by Infineon Technologies, designed for low-side switching applications with a 1:1 input-to-output ratio. This device operates at a maximum load voltage of 50V with an output current capability of 1.8A and features slew rate control with over-temperature and over-voltage protection. The IRSF3031L is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	IRSF3031L
Manufacturer	Infineon Technologies
Category	Power Management (PMIC)
Switch Type	General Purpose
Output Configuration	Low Side
Output Type	N-Channel
Ratio - Input:Output	1:1
Number of Outputs	1
Voltage - Load (Max)	50V
Current - Output (Max)	1.8A
Rds On (Typ)	155mOhm
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	TO-261-4, TO-261AA
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the IRSF3031L are identified based on the following critical parameters that define functional equivalence:

Output Configuration: Low Side
Output Type: N-Channel
Ratio - Input:Output: 1:1
Number of Outputs: 1
Package / Case: TO-261-4, TO-261AA
Mounting Type: Surface Mount
Interface: On/Off

The substitute parts BSP78HUMA1 and BTS3134NHUMA1 maintain these core functional and mechanical characteristics. Both substitutes are active products from Infineon Technologies, providing improved specifications in current handling and on-resistance while preserving the same package footprint and electrical interface required for direct replacement in existing designs.

Parameter Comparison

Parameter	IRSF3031L	BSP78HUMA1	BTS3134NHUMA1
Manufacturer	Infineon Technologies	Infineon Technologies	Infineon Technologies
Switch Type	General Purpose	General Purpose	General Purpose
Output Configuration	Low Side	Low Side	Low Side
Output Type	N-Channel	N-Channel	N-Channel
Ratio - Input:Output	1:1	1:1	1:1
Number of Outputs	1	1	1
Voltage - Load (Max)	50V	42V	42V
Current - Output (Max)	1.8A	3A	3A
Rds On (Typ)	155mOhm	35mOhm	35mOhm
Input Type	Non-Inverting	Non-Inverting	Non-Inverting
Operating Temperature	-55°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
Fault Protection	Over Temperature, Over Voltage	Current Limiting (Fixed), Over Temperature, Over Voltage	Current Limiting (Fixed), Over Temperature, Over Voltage
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both BSP78HUMA1 and BTS3134NHUMA1 are active products suitable for replacing the obsolete IRSF3031L in new designs and production continuity scenarios. The substitute parts offer enhanced electrical performance with lower on-resistance (35mOhm versus 155mOhm) and higher current capability (3A versus 1.8A), while maintaining identical package geometry and interface characteristics.

Key considerations for selection:

Both substitutes are ROHS3 compliant, addressing regulatory requirements that the original IRSF3031L does not meet
The maximum load voltage specification decreases from 50V to 42V in the substitute parts; applications requiring operation above 42V are not suitable for these alternatives
The minimum operating temperature increases from -55°C to -40°C; applications requiring operation below -40°C require design review
Both substitutes provide additional current limiting protection not present in the original device
BSP78HUMA1 includes auto-restart functionality; BTS3134NHUMA1 does not

Frequently Asked Questions (FAQ)

Q: Can BSP78HUMA1 and BTS3134NHUMA1 be used interchangeably with IRSF3031L?

A: Both parts maintain the same package footprint (TO-261-4, TO-261AA), pinout configuration, and low-side N-Channel switching interface. Direct PCB substitution is mechanically and electrically feasible for applications operating within the specified voltage and temperature ranges of the substitute parts.

Q: What is the primary limitation when substituting to BSP78HUMA1 or BTS3134NHUMA1?

A: The maximum load voltage specification is reduced from 50V to 42V. Applications requiring operation above 42V cannot use these substitutes without circuit redesign.

Q: Are there temperature range considerations for substitution?

A: The minimum operating temperature increases from -55°C to -40°C. Applications requiring junction temperatures below -40°C require alternative component selection or design modification.

Q: What is the difference between BSP78HUMA1 and BTS3134NHUMA1?

A: Both parts share identical electrical specifications and package characteristics. BSP78HUMA1 includes auto-restart functionality as an additional feature; BTS3134NHUMA1 does not list this feature. Packaging differs: BSP78HUMA1 is supplied in Cut Tape and Digi-Reel format, while BTS3134NHUMA1 is supplied in Tape & Reel format.

Q: Do the substitute parts provide improved protection compared to IRSF3031L?

A: Yes. Both BSP78HUMA1 and BTS3134NHUMA1 include current limiting protection in addition to the over-temperature and over-voltage protection present in the original device.

Q: Are compliance certifications different between the original and substitute parts?

A: The IRSF3031L is RoHS non-compliant. Both substitute parts are ROHS3 compliant, meeting current regulatory requirements for electronic components in restricted substance applications.

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