IRF6603 Equivalent & Substitute Parts Reference

Part Overview

The IRF6603 is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 27A continuous drain current (Ta) and 92A (Tc). This device features the DIRECTFET™ MT package and operates across a temperature range of -40°C to 150°C. The IRF6603 is classified as obsolete, making identification of suitable substitute components essential for ongoing production and design continuity. Equivalent parts must maintain electrical compatibility across voltage ratings, current handling, and thermal characteristics while accommodating modern packaging and compliance requirements.

Substiute Parts

IRF6603

Infineon TechnologiesIn Stock: 21154IRF6603 Datasheet

Current PartRFQ

PSMN3R5-30YL,115

Nexperia USA Inc.In Stock: 1929PSMN3R5-30YL,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRF6603 is determined by strict electrical and mechanical compatibility criteria. The primary substitute identified is the PSMN3R5-30YL,115 from Nexperia USA Inc.

Substitution Logic:

The PSMN3R5-30YL,115 qualifies as an equivalent substitute based on the following matching parameters:

• Voltage Rating: Both devices maintain 30V Vdss, ensuring identical voltage class compatibility
• Current Capability: The substitute provides 100A (Tc) continuous drain current, exceeding the IRF6603's 92A (Tc), ensuring superior current handling capacity
• On-Resistance: The substitute's 3.5mOhm @ 15A, 10V is comparable to the IRF6603's 3.4mOhm @ 25A, 10V, maintaining similar conduction losses
• Gate Threshold Voltage: The substitute's 2.15V @ 1mA falls within acceptable switching characteristics relative to the IRF6603's 2.5V @ 250µA
• Temperature Range: The substitute's -55°C to 175°C operating range exceeds the IRF6603's -40°C to 150°C, providing extended thermal capability
• Technology: Both devices employ Metal Oxide MOSFET technology with N-Channel configuration

Key Substitution Parameters:

• Drain-to-Source Voltage (Vdss): 30V (identical)
• Continuous Drain Current: 92A to 100A (Tc) (equivalent or superior)
• On-Resistance: 3.4 to 3.5mOhm (comparable)
• Gate Threshold Voltage: 2.15 to 2.5V (compatible range)
• Operating Temperature: -40°C to 175°C (extended range)

Parameter Comparison

Engineering Selection Recommendations

Compliance and Status Considerations:

The IRF6603 is classified as obsolete, and the PSMN3R5-30YL,115 is classified as "Not For New Designs." Both devices present long-term supply and support limitations.

The PSMN3R5-30YL,115 offers significant compliance advantages:

• RoHS3 Compliance: The substitute meets ROHS3 requirements, whereas the IRF6603 is RoHS non-compliant. This is critical for applications subject to EU environmental directives and equivalent regulations.
• Moisture Sensitivity: The substitute's MSL 1 rating (unlimited shelf life) provides superior handling and storage characteristics compared to the IRF6603's MSL 3 (168-hour limit).

Electrical Compatibility:

The substitute maintains electrical equivalence across all critical parameters. The 100A (Tc) rating of the PSMN3R5-30YL,115 exceeds the IRF6603's 92A (Tc), providing design margin. On-resistance values are comparable, ensuring similar conduction losses. The substitute's lower gate charge (41nC vs. 72nC) and input capacitance (2458pF vs. 6590pF) indicate improved switching performance characteristics.

Thermal Performance:

The substitute's extended operating temperature range (-55°C to 175°C vs. -40°C to 150°C) and higher power dissipation rating (74W vs. 42W at Tc) support broader application environments.

Package Transition:

The DIRECTFET™ MT package of the IRF6603 differs from the LFPAK56/Power-SO8 package of the substitute. PCB layout modifications are required to accommodate the different footprint and thermal characteristics.

Frequently Asked Questions (FAQ)

Q1: Can the PSMN3R5-30YL,115 directly replace the IRF6603 without PCB modifications?

A: No. While the devices are electrically equivalent, they use different packages (DIRECTFET™ MT vs. LFPAK56/Power-SO8). PCB layout redesign is necessary to accommodate the different footprint, pin configuration, and thermal interface requirements.

Q2: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Drain-to-Source Voltage (Vdss) rating, (2) Continuous Drain Current capability, (3) On-Resistance (Rds On) characteristics, (4) Gate Threshold Voltage (Vgs(th)), and (5) Operating Temperature range. The PSMN3R5-30YL,115 meets or exceeds all these parameters relative to the IRF6603.

Q3: Why is the PSMN3R5-30YL,115 also marked "Not For New Designs"?

A: Both the IRF6603 and PSMN3R5-30YL,115 are mature products with limited future support. For new designs, consultation with component suppliers for current-generation alternatives is recommended to ensure long-term availability and support.

Q4: What is the significance of the RoHS compliance difference?

A: The IRF6603 is RoHS non-compliant, while the PSMN3R5-30YL,115 is ROHS3 compliant. This is critical for applications subject to EU Restriction of Hazardous Substances directives or equivalent regulations in other jurisdictions. The substitute meets modern environmental standards.

Q5: How do the gate charge and input capacitance differences affect circuit design?

A: The PSMN3R5-30YL,115 has lower gate charge (41nC vs. 72nC) and input capacitance (2458pF vs. 6590pF). This results in faster switching transitions and reduced gate drive power requirements. Gate driver circuits may require adjustment to optimize switching performance with the substitute device.

Q6: Are there thermal management differences between the two packages?

A: Yes. The DIRECTFET™ MT and LFPAK56/Power-SO8 packages have different thermal interfaces and power dissipation characteristics. The PSMN3R5-30YL,115's higher power dissipation rating (74W vs. 42W at Tc) indicates superior thermal capability, but thermal design must account for the different package geometry and mounting interface.

Q7: What is the moisture sensitivity impact on manufacturing and storage?

A: The IRF6603 (MSL 3) requires controlled storage conditions with a 168-hour shelf life limit after moisture exposure. The PSMN3R5-30YL,115 (MSL 1) has unlimited shelf life, reducing manufacturing complexity and inventory management requirements.

Q8: Are the gate threshold voltage differences significant for circuit operation?

A: The gate threshold voltages are comparable (2.15V vs. 2.5V) and fall within acceptable switching ranges for standard gate driver circuits. The difference is not significant for typical applications, though gate driver timing may require minor adjustment during circuit validation.