IRFIB41N15DPBF Equivalent & Substitute Parts

Part Overview

The IRFIB41N15DPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 150V drain-to-source voltage with 41A continuous drain current at 25°C. This device is packaged in TO-220AB Full-Pak configuration and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility within the electrical and mechanical constraints of the original application.

Substiute Parts

IRFIB41N15DPBF

Infineon TechnologiesIn Stock: 1581IRFIB41N15DPBF Datasheet

Current PartRFQ

IRFI540GPBF

Vishay SiliconixIn Stock: 15558IRFI540GPBF Datasheet

MFR RecommendedRFQ

IRLI540G

Vishay SiliconixIn Stock: 2796IRLI540G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFIB41N15DPBF is constrained by the following critical parameters:

Voltage Rating: The original part specifies 150V Vdss. Substitute parts must operate at or above this voltage rating to ensure safe operation in the original circuit topology.

Current Capacity: The original part delivers 41A continuous drain current. Substitute parts with lower current ratings (such as 17A) represent functional downgrades and are not direct equivalents. They may be used only in applications where the actual circuit current demand is lower than the original specification.

On-Resistance (Rds On): The original part specifies 45 mOhm maximum at 25A and 10V gate drive. This parameter directly affects power dissipation and thermal performance.

Gate Charge (Qg): The original part specifies 110 nC at 10V. Gate charge affects switching speed and driver circuit requirements.

Mounting and Package: The original part uses TO-220AB Full-Pak through-hole configuration. Substitute parts must use compatible through-hole packages to maintain mechanical fit and thermal interface properties.

Product Status and Compliance: The original part is obsolete. Active substitute parts must meet current RoHS and REACH requirements for new production applications.

The substitute parts listed below do not meet the voltage and current specifications of the original IRFIB41N15DPBF. They are provided as reference only for applications where circuit requirements differ from the original design specifications.

Parameter Comparison

Engineering Selection Recommendations

IRFI540GPBF: This part is manufactured by Vishay Siliconix and carries active product status with ROHS3 compliance. It is suitable for new production applications requiring RoHS certification. However, it operates at 100V Vdss and 17A Id, both significantly lower than the original IRFIB41N15DPBF specifications. Selection of this part requires circuit redesign or confirmation that the application operates within these reduced electrical parameters.

IRLI540G: This part is also manufactured by Vishay Siliconix and carries active product status. It does not meet ROHS3 compliance and is classified as RoHS non-compliant. It operates at 100V Vdss and 17A Id, matching the electrical downgrade of IRFI540GPBF. This part is not recommended for new production applications requiring RoHS certification.

For applications requiring the full 150V voltage rating and 41A current capacity of the original IRFIB41N15DPBF, direct electrical equivalents from active product lines must be sourced separately. The substitute parts listed above are functional alternatives only for circuits operating within their reduced voltage and current specifications.

Frequently Asked Questions (FAQ)

Q: Can IRFI540GPBF or IRLI540G be used as direct replacements for IRFIB41N15DPBF?

A: No. The substitute parts operate at 100V Vdss and 17A Id, compared to the original 150V and 41A specifications. Direct replacement is not possible without circuit modification. These parts may be used only in applications where the actual operating voltage and current are within their rated specifications.

Q: What is the significance of the voltage rating difference?

A: The original IRFIB41N15DPBF is rated for 150V drain-to-source voltage. The substitute parts are rated for 100V. Using a lower-voltage device in a circuit designed for 150V operation creates risk of device failure due to overvoltage stress. Voltage rating must match or exceed the circuit requirement.

Q: What is the significance of the current rating difference?

A: The original part delivers 41A continuous drain current. The substitute parts deliver 17A. If the circuit requires more than 17A, the substitute parts will not function properly and may overheat. Current rating must match or exceed the circuit requirement.

Q: Are the TO-220-3 packages of the substitute parts compatible with the TO-220AB Full-Pak of the original?

A: Both packages are through-hole TO-220 variants with three leads. Mechanical fit to the PCB is compatible. However, thermal interface properties may differ. The TO-220AB Full-Pak and TO-220-3 Full Pack with Isolated Tab have different thermal characteristics. Thermal performance must be verified for the specific application.

Q: Why is IRLI540G marked as RoHS non-compliant?

A: IRLI540G does not meet ROHS3 compliance requirements. It is not suitable for new production applications subject to RoHS regulations. IRFI540GPBF is the compliant alternative between the two substitute parts.

Q: What does "Obsolete" status mean for the original IRFIB41N15DPBF?

A: Obsolete status indicates that Infineon Technologies has discontinued this part. New inventory may be limited, and long-term availability is not guaranteed. Substitute parts from active product lines are necessary for ongoing production and new designs.

Q: Can gate drive voltage differences affect circuit operation?

A: Yes. The original part specifies Vgs (Max) of ±20V. IRFI540GPBF also specifies ±20V, but IRLI540G specifies ±10V. If the circuit applies gate drive voltages above ±10V, IRLI540G may be damaged. Gate drive voltage compatibility must be verified.