IRL3402 Equivalent & Substitute Parts

Part Overview

The IRL3402 is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 20V drain-to-source voltage with 85A continuous drain current in a Through Hole TO-220AB package. This device is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing production and maintenance applications. The HEXFET® series component delivers 110W maximum power dissipation and operates across a temperature range of -55°C to 150°C.

Substiute Parts

IRL3402

Infineon TechnologiesIn Stock: 18964IRL3402 Datasheet

Current PartRFQ

STP90NF03L

STMicroelectronicsIn Stock: 35428STP90NF03L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRL3402 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• FET Type: N-Channel topology
• Package: Through Hole TO-220 form factor
• Drain-to-Source Voltage (Vdss): Equal to or greater than 20V
• Continuous Drain Current (Id): Equal to or greater than 85A at 25°C
• On-State Resistance (Rds On): Lower or equivalent values
• Operating Temperature Range: Minimum -55°C to 150°C coverage
• Gate Charge (Qg): Lower or equivalent switching characteristics

The STP90NF03L from STMicroelectronics meets these criteria with a 30V Vdss rating (exceeding the 20V requirement), 90A continuous drain current (exceeding 85A), and improved thermal performance at 150W maximum power dissipation. The substitute maintains Through Hole TO-220 packaging compatibility and N-Channel MOSFET technology.

Parameter Comparison

Engineering Selection Recommendations

Product Status Considerations:

The IRL3402 is classified as Obsolete. The STP90NF03L is classified as Not For New Designs, indicating both devices are legacy components. For applications currently using the IRL3402, the STP90NF03L provides functional equivalence with improved electrical performance margins.

Compliance and Certification:

The IRL3402 is RoHS non-compliant. The STP90NF03L is ROHS3 compliant, offering regulatory advantage for applications subject to RoHS requirements. Both devices are REACH Unaffected and carry EAR99 ECCN classification.

Electrical Performance:

The STP90NF03L exceeds the IRL3402 specifications across all critical parameters: higher Vdss (30V vs. 20V), higher Id (90A vs. 85A), lower Rds On (6.5 mOhm vs. 8 mOhm), and lower gate charge (47 nC vs. 78 nC). These characteristics indicate improved switching efficiency and reduced thermal stress.

Thermal and Temperature Range:

The STP90NF03L provides extended operating temperature range (-65°C to 175°C vs. -55°C to 150°C) and higher power dissipation capability (150W vs. 110W), supporting more demanding thermal environments.

Package Compatibility:

Both devices use Through Hole TO-220-3 packaging, ensuring direct mechanical and electrical compatibility in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the STP90NF03L directly replace the IRL3402 in existing designs?

A: Yes. Both devices share identical Through Hole TO-220-3 packaging and N-Channel MOSFET topology. The STP90NF03L meets or exceeds all electrical specifications of the IRL3402, including voltage rating, current capacity, and thermal performance. No circuit modifications are required.

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

A: The STP90NF03L provides higher voltage rating (30V vs. 20V), higher current capacity (90A vs. 85A), lower on-state resistance (6.5 mOhm vs. 8 mOhm), lower gate charge (47 nC vs. 78 nC), higher power dissipation (150W vs. 110W), and extended temperature range (-65°C to 175°C vs. -55°C to 150°C). The STP90NF03L is also ROHS3 compliant while the IRL3402 is not.

Q: Are there any electrical parameter mismatches that would prevent substitution?

A: No. All electrical parameters of the STP90NF03L are equal to or superior to the IRL3402. The higher Vdss rating provides additional voltage margin, and the lower Rds On reduces conduction losses.

Q: What is the significance of the gate charge difference?

A: Gate charge (Qg) determines switching speed and driver circuit requirements. The STP90NF03L has lower gate charge (47 nC vs. 78 nC), resulting in faster switching transitions and reduced driver power consumption. This is a performance advantage.

Q: Does the higher power dissipation rating of the STP90NF03L affect thermal management?

A: The higher power dissipation rating (150W vs. 110W) indicates improved thermal capability, not increased heat generation. In equivalent operating conditions, the STP90NF03L may generate less heat due to lower Rds On. Existing thermal management solutions designed for the IRL3402 remain adequate for the STP90NF03L.

Q: Why is the IRL3402 classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support. The STP90NF03L, though classified as Not For New Designs, remains available in inventory and provides functional equivalence for maintenance and replacement applications.

Q: Are there any compliance advantages to using the STP90NF03L?

A: Yes. The STP90NF03L is ROHS3 compliant, while the IRL3402 is RoHS non-compliant. For applications subject to RoHS regulations, the STP90NF03L is the appropriate choice.