IRFP4242PBF N-Channel 300V 46A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFP4242PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 300V drain-to-source voltage and 46A continuous drain current in a Through Hole TO-247AC package. This device is classified as Obsolete, indicating it is no longer in active production. Finding equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing manufacturing requirements for applications utilizing this component.

Substiute Parts

64-6006PBF

Infineon TechnologiesIn Stock: 117064-6006PBF Datasheet

Current PartRFQ

IRFP4868PBF

Infineon TechnologiesIn Stock: 54628IRFP4868PBF Datasheet

MFR RecommendedRFQ

AOK60N30L

Alpha & Omega Semiconductor Inc.In Stock: 9217AOK60N30L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFP4242PBF is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Drain to Source Voltage (Vdss): Must equal or exceed 300V
• FET Type: Must be N-Channel
• Package / Case: Must be TO-247-3 (Through Hole)
• Mounting Type: Must be Through Hole
• Technology: Must be MOSFET (Metal Oxide)

Performance Parameters (Allowable Variation):

• Current - Continuous Drain (Id): Substitute must meet or exceed 46A
• Rds On (Max): Lower values are acceptable (improved performance)
• Power Dissipation (Max): Equal or higher values are acceptable
• Operating Temperature Range: Must encompass or exceed -40°C to 175°C

The two substitute parts listed below satisfy all critical criteria and provide equivalent or enhanced electrical performance within the same physical package footprint.

Parameter Comparison

Engineering Selection Recommendations

IRFP4868PBF (Infineon Technologies)

The IRFP4868PBF is a direct substitute manufactured by the same supplier as the original part. It provides superior electrical performance with 70A continuous drain current (compared to 46A) and reduced on-resistance of 32 mOhm (compared to 59 mOhm). The device maintains identical voltage rating and package configuration. The extended lower operating temperature limit (-55°C versus -40°C) provides additional thermal margin. Product status is "Not For New Designs," indicating limited availability but continued support for existing applications. RoHS3 compliance is confirmed.

AOK60N30L (Alpha & Omega Semiconductor Inc.)

The AOK60N30L is a cross-manufacturer substitute providing 60A continuous drain current and 56 mOhm on-resistance. This device offers the highest power dissipation rating (658W) among the three options. The extended lower operating temperature limit (-55°C) matches the IRFP4868PBF. RoHS3 compliance is confirmed. Product status is Obsolete, consistent with the original part. This option is suitable for applications where supply from an alternative manufacturer is required.

Both substitutes are electrically compatible with the IRFP4242PBF within the specified TO-247-3 package and support identical circuit board layouts and thermal management approaches.

Frequently Asked Questions (FAQ)

Q: Can the IRFP4868PBF directly replace the IRFP4242PBF in my circuit?

A: Yes. Both devices share identical Vdss (300V), FET type (N-Channel), and package (TO-247-3). The IRFP4868PBF provides higher current rating (70A versus 46A) and lower on-resistance (32 mOhm versus 59 mOhm), making it a direct electrical upgrade. No circuit modifications are required.

Q: What is the difference between the two substitute parts?

A: IRFP4868PBF is manufactured by Infineon (original supplier), while AOK60N30L is manufactured by Alpha & Omega Semiconductor. Both meet the 300V/46A+ specification. IRFP4868PBF offers lower on-resistance (32 mOhm); AOK60N30L offers higher power dissipation (658W). Both use identical TO-247-3 packaging.

Q: Are there any thermal management differences between these parts?

A: All three devices use the same TO-247-3 package with identical mounting footprints and thermal interface requirements. Thermal performance depends on PCB layout, heatsink design, and airflow—not on package differences. The higher power dissipation ratings of the substitutes (517W and 658W versus 430W) indicate improved thermal capability under identical operating conditions.

Q: Do these substitutes have different gate drive requirements?

A: All three devices specify 10V drive voltage for maximum on-resistance performance. Gate charge values differ slightly (IRFP4242PBF: 247 nC; IRFP4868PBF: 270 nC; AOK60N30L: 106 nC), but standard gate driver circuits accommodate these variations without modification.

Q: Which substitute should I choose for new inventory procurement?

A: IRFP4868PBF is recommended for direct replacement due to identical manufacturer (Infineon) and superior electrical performance. AOK60N30L is suitable if Infineon supply is unavailable. Both are electrically compatible and use the same package.

Q: Are these parts RoHS compliant?

A: IRFP4868PBF is RoHS3 compliant. AOK60N30L is RoHS3 compliant. Both meet current environmental regulations. The original IRFP4242PBF compliance status was not specified in available data.