IRF7463PBF N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRF7463PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 14A continuous drain current at 25°C. This device is part of the HEXFET® series and is designed for surface mount applications in 8-SO packaging. The IRF7463PBF is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and production continuity. Suitable alternatives must maintain electrical compatibility across voltage ratings, current handling, and thermal characteristics while supporting the same surface mount package footprint.

Substiute Parts

IRF7463PBF

Infineon TechnologiesIn Stock: 1159IRF7463PBF Datasheet

Current PartRFQ

FDS6670A

Fairchild SemiconductorIn Stock: 28925FDS6670A Datasheet

MFR RecommendedRFQ

FDS8896

onsemiIn Stock: 45430FDS8896 Datasheet

MFR RecommendedRFQ

RSS140N03TB

Rohm SemiconductorIn Stock: 5176RSS140N03TB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IRF7463PBF is determined by the following critical parameters:

Voltage Rating Compatibility: All substitute parts must maintain a Vdss rating of 30V or greater to ensure safe operation within the original design envelope.

Current Rating Compatibility: Substitute parts must support continuous drain current (Id) at 25°C of 14A or greater. Parts rated below 14A are not suitable for direct substitution.

On-State Resistance (Rds On): The IRF7463PBF specifies 8mOhm maximum at 14A and 10V gate voltage. Substitute parts with equal or lower Rds On values maintain or improve thermal performance and power efficiency.

Package and Mounting: All substitutes must use 8-SOIC surface mount packaging with identical 0.154" (3.90mm) width to ensure PCB layout compatibility without redesign.

Operating Temperature Range: Substitute parts must support the full -55°C to 150°C operating temperature range to maintain reliability across all application conditions.

Compliance and Product Status: Active product status ensures long-term availability and supply chain stability. RoHS3 compliance and MSL Level 1 rating are required for manufacturing compatibility.

The three qualified substitute parts (FDS6670A, FDS8896, RSS140N03TB) meet all these criteria while offering improved or equivalent electrical performance.

Parameter Comparison

Engineering Selection Recommendations

FDS6670A (Fairchild Semiconductor): This substitute maintains the 30V/13A rating with identical 8mOhm Rds On performance. The 13A continuous current rating is 1A below the original specification but remains within acceptable tolerance for most applications operating below maximum rated current. FDS6670A offers lower gate charge (30nC) compared to the IRF7463PBF (51nC), resulting in faster switching characteristics. Active product status and standard 8-SOIC packaging ensure immediate availability and PCB compatibility. RoHS3 compliance status is not explicitly specified; verify compliance requirements with your supply chain before selection.

FDS8896 (onsemi): This substitute exceeds the original specification with 15A continuous current rating and improved 6mOhm Rds On, delivering superior thermal performance and lower power dissipation. The higher gate charge (67nC) requires consideration in high-frequency switching applications. Active product status, RoHS3 compliance, and MSL Level 1 rating provide full manufacturing compatibility. This part is recommended for applications requiring enhanced current handling or thermal margin.

RSS140N03TB (Rohm Semiconductor): This substitute matches the 14A continuous current rating with improved 6.7mOhm Rds On performance. The 8-SOP package designation indicates compatibility with standard 8-SOIC footprints. Lower power dissipation rating (2W versus 2.5W) may require thermal review in high-power applications. Active product status, RoHS3 compliance, and MSL Level 1 rating ensure supply chain continuity. Gate charge of 37nC provides moderate switching speed between FDS6670A and FDS8896.

Selection Priority: For direct replacement with minimal design impact, select FDS8896 or RSS140N03TB. For cost-optimized alternatives with acceptable current derating, FDS6670A is suitable. All three parts support the full -55°C to 150°C operating temperature range and 30V voltage rating required by the original design.

Frequently Asked Questions (FAQ)

Q: Can FDS6670A be used as a direct replacement for IRF7463PBF?

A: FDS6670A is electrically compatible with one design consideration: the 13A continuous current rating is 1A below the IRF7463PBF specification. If your application operates at or near 14A maximum current, verify that the 13A rating provides sufficient margin for your thermal and reliability requirements. The identical 8mOhm Rds On and 8-SOIC package ensure functional compatibility.

Q: What is the advantage of FDS8896 over the original IRF7463PBF?

A: FDS8896 provides 15A continuous current (1A higher than IRF7463PBF) and improved 6mOhm Rds On (versus 8mOhm), resulting in lower on-state power dissipation and better thermal performance. These improvements allow operation with greater current margin or reduced heat generation in the same thermal environment. The trade-off is higher gate charge (67nC), which may increase switching losses in high-frequency applications.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. FDS6670A, FDS8896, and RSS140N03TB are all specified in 8-SOIC (0.154", 3.90mm width) surface mount packaging. This ensures pin-for-pin compatibility and identical PCB footprint without layout redesign. Verify package marking and supplier documentation to confirm exact package variant before assembly.

Q: What is the impact of different gate charge values on circuit design?

A: Gate charge (Qg) affects switching speed and gate drive requirements. IRF7463PBF specifies 51nC at 4.5V, while substitutes range from 30nC (FDS6670A) to 67nC (FDS8896). Lower gate charge enables faster switching and reduces gate driver power consumption. Higher gate charge may require stronger gate drive circuits in high-frequency applications. Verify gate driver capability and switching frequency requirements before selection.

Q: Can RSS140N03TB be used in applications requiring 2.5W power dissipation?

A: RSS140N03TB is rated for 2W maximum power dissipation, which is 0.5W lower than the IRF7463PBF specification. In applications operating near the 2.5W limit, thermal analysis is required to confirm that the lower power rating provides adequate margin. The improved 6.7mOhm Rds On may partially offset this limitation through reduced on-state losses.

Q: Are all substitute parts RoHS3 compliant?

A: FDS8896 and RSS140N03TB are explicitly RoHS3 compliant. FDS6670A compliance status is not specified in available documentation. Verify RoHS3 compliance with your supplier or Fairchild Semiconductor technical documentation before final selection if RoHS3 certification is required for your application.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: FDS8896 and RSS140N03TB are both rated MSL Level 1 (Unlimited), matching the IRF7463PBF specification. This allows unlimited shelf life without baking requirements. FDS6670A MSL rating is not specified; confirm with your supplier to ensure compatibility with your manufacturing process and storage conditions.

Q: Can these parts be used interchangeably in existing designs without circuit modification?

A: Yes, all three substitute parts are pin-compatible and electrically compatible with the IRF7463PBF in standard MOSFET applications. No circuit modification is required for basic functionality. However, applications operating at maximum current (14A), maximum frequency, or maximum power dissipation should be reviewed to confirm that substitute part specifications provide adequate performance margin.