IRFS7734TRL7PP N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFS7734TRL7PP is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 75V drain-to-source voltage with 197A continuous drain current at 25°C. This device is packaged in a D2PAK (TO-263-7) surface mount configuration and is part of the HEXFET® and StrongIRFET™ series. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. Equivalent parts must maintain compatibility across electrical ratings, thermal performance, and mechanical packaging specifications.

Substiute Parts

IRFS7734TRL7PP

Infineon TechnologiesIn Stock: 2257IRFS7734TRL7PP Datasheet

Current PartRFQ

IRFS3107TRL7PP

Infineon TechnologiesIn Stock: 18456IRFS3107TRL7PP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFS7734TRL7PP is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Drain-to-Source Voltage (Vdss) must equal or exceed 75V
• Continuous Drain Current (Id) must meet or exceed 197A at 25°C
• On-State Resistance (Rds On) must not exceed specified maximum values at rated conditions
• Gate Threshold Voltage (Vgs(th)) must fall within acceptable operating margins
• Gate Charge (Qg) characteristics must support existing gate drive circuitry
• Power Dissipation capability must support thermal requirements

Mechanical & Packaging Compatibility:

• Package type must be D2PAK (TO-263-7) surface mount configuration
• Lead count and pinout must be identical
• Mounting footprint must be compatible with existing PCB layouts

Regulatory & Compliance Requirements:

• RoHS3 compliance status
• Moisture Sensitivity Level (MSL) rating
• REACH compliance status

The IRFS3107TRL7PP qualifies as a direct substitute based on matching voltage rating (75V Vdss), exceeding current capability (240A vs. 197A), improved on-state resistance characteristics, identical package configuration, and equivalent regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The IRFS3107TRL7PP is a direct substitute for the obsolete IRFS7734TRL7PP based on the following engineering criteria:

Electrical Performance: The substitute part maintains the same 75V Vdss rating and exceeds the minimum continuous drain current requirement (240A vs. 197A). The on-state resistance is improved (2.6 mOhm vs. 3.05 mOhm), resulting in lower conduction losses and reduced thermal stress. Gate charge is lower (240 nC vs. 270 nC), which may reduce gate drive power requirements. These characteristics ensure the substitute part will operate within or exceed the performance envelope of the original design.

Thermal Management: The IRFS3107TRL7PP provides superior power dissipation capability (370W vs. 294W), offering additional thermal margin for the same operating conditions. This enhancement supports long-term reliability and design robustness.

Packaging & Mechanical Compatibility: Both parts use identical D2PAK (TO-263-7) surface mount packaging with matching pinout and footprint. No PCB layout modifications are required.

Regulatory Compliance: Both parts maintain ROHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and REACH unaffected status. No compliance barriers exist for substitution.

Product Status: The substitute part is classified as active with confirmed inventory availability (18,424 pcs), ensuring long-term supply continuity compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can the IRFS3107TRL7PP be used as a direct replacement for the IRFS7734TRL7PP without circuit modifications?

A: Yes. Both parts share identical voltage ratings (75V Vdss), matching D2PAK packaging, and compatible gate drive characteristics. The substitute part's improved electrical performance (higher current rating, lower on-state resistance, lower gate charge) ensures compatibility with existing circuit designs. No modifications to PCB layout, gate drive circuitry, or thermal management are required for direct substitution.

Q: What are the key differences between these two parts?

A: The primary differences are continuous drain current (240A vs. 197A), on-state resistance (2.6 mOhm vs. 3.05 mOhm at rated conditions), gate charge (240 nC vs. 270 nC), and power dissipation capability (370W vs. 294W). All differences favor the substitute part, providing improved performance margins. The main part is obsolete; the substitute is active with available inventory.

Q: Are there any thermal or reliability concerns with substitution?

A: No. The substitute part provides superior thermal performance with higher power dissipation capability. Lower on-state resistance reduces conduction losses, resulting in lower junction temperatures under identical operating conditions. This enhancement improves long-term reliability and design margin.

Q: Does the substitute part require different gate drive voltage or circuitry?

A: No. Both parts accept identical gate drive voltage (±20V maximum) and have compatible gate threshold voltage characteristics. Gate charge is lower in the substitute part (240 nC vs. 270 nC), which may reduce gate drive power consumption but does not require circuit modifications.

Q: Are there any compliance or regulatory differences?

A: No. Both parts maintain identical RoHS3 compliance status, MSL Level 1 rating, and REACH unaffected status. No additional compliance documentation or design review is required for substitution.

Q: What is the availability status of each part?

A: The IRFS7734TRL7PP is classified as obsolete with limited remaining inventory (2,200 pcs). The IRFS3107TRL7PP is active with substantial inventory availability (18,424 pcs), ensuring reliable long-term supply for new designs and production continuity.

Q: Can the IRFS3107TRL7PP be used in applications requiring the exact specifications of the IRFS7734TRL7PP?

A: Yes. The substitute part meets or exceeds all electrical specifications of the original part. Applications requiring 75V, 197A minimum continuous drain current, and D2PAK packaging will operate correctly with the IRFS3107TRL7PP. The improved performance characteristics provide additional design margin.