IRF3708SPBF N-Channel 30V 62A MOSFET Equivalent & Substitute Parts

Part Overview

The IRF3708SPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 62A continuous drain current at 25°C. The device is housed in a D2PAK surface mount package and is classified as obsolete. Due to its obsolete product status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production runs and system updates.

Substiute Parts

IRF3708SPBF

Infineon TechnologiesIn Stock: 8124IRF3708SPBF Datasheet

Current PartRFQ

PSMN017-30BL,118

Nexperia USA Inc.In Stock: 2850PSMN017-30BL,118 Datasheet

MFR RecommendedRFQ

PSMN4R3-30BL,118

Nexperia USA Inc.In Stock: 10797PSMN4R3-30BL,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRF3708SPBF is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Drain-to-Source Voltage (Vdss): Must equal 30V
• Package Type: Must be D2PAK (TO-263-3) surface mount
• FET Type: Must be N-Channel MOSFET
• Operating Temperature Range: Must support -55°C to 175°C
• Mounting Type: Must be surface mount

Performance Consideration Parameters:

• Continuous Drain Current (Id): Substitute must meet or exceed 62A at 25°C
• On-State Resistance (Rds On): Lower values indicate improved performance
• Power Dissipation: Must support thermal requirements of the application
• Gate Charge (Qg): Affects switching speed and drive circuit requirements

The substitute parts listed below maintain full electrical and mechanical compatibility with the IRF3708SPBF while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

PSMN4R3-30BL,118 (Nexperia USA Inc.) - Primary Substitute

The PSMN4R3-30BL,118 is the recommended primary substitute for the IRF3708SPBF. This device maintains identical voltage rating (30V Vdss) and package configuration (D2PAK surface mount). The PSMN4R3-30BL,118 exceeds the current rating of the original part at 100A continuous drain current versus 62A, providing design margin for thermal and electrical performance. The on-state resistance is significantly lower at 4.1 mOhm compared to 12 mOhm, resulting in reduced power dissipation and improved efficiency. The device carries active product status from Nexperia, ensuring long-term availability and supply chain stability. ROHS3 compliance and REACH unaffected status align with current regulatory requirements.

PSMN017-30BL,118 (Nexperia USA Inc.) - Secondary Substitute

The PSMN017-30BL,118 serves as a secondary substitute option. While it maintains the 30V voltage rating and D2PAK package, the continuous drain current rating of 32A is below the original 62A specification. This part is suitable only for applications where the actual operating current does not exceed 32A. The gate charge is lower at 10.7 nC, which may reduce drive circuit complexity. Like the primary substitute, this device is ROHS3 compliant and REACH unaffected. However, the product status is obsolete, limiting its long-term availability advantage.

Selection Criteria:

• For applications requiring current capacity at or above 62A: Select PSMN4R3-30BL,118
• For applications with maximum current below 32A: Either substitute is acceptable; PSMN4R3-30BL,118 is preferred for future-proofing
• For thermal-sensitive designs: PSMN4R3-30BL,118 offers superior thermal performance due to lower Rds On
• For regulatory compliance: Both Nexperia substitutes provide ROHS3 compliance; original IRF3708SPBF compliance status not specified

Frequently Asked Questions (FAQ)

Q: Can the PSMN4R3-30BL,118 be used as a direct drop-in replacement for the IRF3708SPBF?

A: Yes. Both devices share identical voltage rating (30V), package type (D2PAK), mounting method (surface mount), and operating temperature range (-55°C to 175°C). The PSMN4R3-30BL,118 exceeds the current and power dissipation specifications of the original part, making it electrically and mechanically compatible for direct substitution.

Q: What is the difference in gate charge between the IRF3708SPBF and PSMN4R3-30BL,118?

A: The IRF3708SPBF has a gate charge of 24 nC at 4.5V, while the PSMN4R3-30BL,118 has 41.5 nC at 10V. The higher gate charge in the substitute requires slightly more energy from the gate drive circuit but does not prevent substitution. Gate drive circuits designed for the original part will function with the substitute; however, switching speed may be marginally affected.

Q: Is the PSMN017-30BL,118 suitable for all applications using the IRF3708SPBF?

A: No. The PSMN017-30BL,118 is rated for 32A continuous drain current, which is below the 62A rating of the original part. This substitute is only appropriate for applications where the actual operating current does not exceed 32A. For applications requiring the full 62A capacity, the PSMN4R3-30BL,118 must be used.

Q: What are the thermal implications of switching from IRF3708SPBF to PSMN4R3-30BL,118?

A: The PSMN4R3-30BL,118 has lower on-state resistance (4.1 mOhm versus 12 mOhm), resulting in reduced power dissipation at equivalent current levels. This translates to lower junction temperatures and improved thermal performance. The maximum power dissipation rating of 103W (versus 87W) provides additional thermal margin.

Q: Are there any compliance or regulatory differences between the original and substitute parts?

A: The PSMN4R3-30BL,118 and PSMN017-30BL,118 are both ROHS3 compliant and REACH unaffected. The original IRF3708SPBF compliance status is not specified in the provided data. Both substitutes meet current regulatory requirements for electronic components in most jurisdictions.

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

A: All three parts (IRF3708SPBF, PSMN4R3-30BL,118, and PSMN017-30BL,118) have a Moisture Sensitivity Level of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can I use the PSMN4R3-30BL,118 in a design originally specified for lower current applications?

A: Yes. The PSMN4R3-30BL,118 can be used in any application where the IRF3708SPBF was specified, regardless of whether the application uses the full 62A capacity. The higher current rating and improved performance characteristics of the substitute provide design margin and improved reliability.