IRFS3004PBF N-Channel 40V 195A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFS3004PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 40V drain-to-source voltage with 195A continuous drain current at 25°C. This device is housed in a D2PAK surface mount package and is part of the HEXFET® series. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

IRFS3004PBF

Infineon TechnologiesIn Stock: 5312IRFS3004PBF Datasheet

Current PartRFQ

BUK661R9-40C,118

Nexperia USA Inc.In Stock: 2390BUK661R9-40C,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFS3004PBF is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute must maintain the 40V Vdss specification to ensure safe operation within the same voltage domain.

Current Capability: The substitute must support continuous drain current sufficient for the application. The IRFS3004PBF delivers 195A at 25°C; substitutes with lower current ratings require application-level verification of thermal and electrical margins.

On-State Resistance (Rds On): This parameter directly affects power dissipation and thermal performance. The IRFS3004PBF specifies 1.75 mOhm maximum at 195A and 10V gate drive. Substitutes with higher Rds On values increase conduction losses.

Package Compatibility: The D2PAK (TO-263-3) surface mount package is mandatory for mechanical and thermal interface compatibility.

Gate Drive Characteristics: Gate threshold voltage, gate charge, and maximum gate voltage must be compatible with the driving circuit. The IRFS3004PBF operates with 10V gate drive and ±20V maximum gate voltage.

Thermal Performance: Power dissipation rating and operating temperature range must support the application's thermal requirements.

Compliance Standards: RoHS3 compliance and MSL rating ensure regulatory and manufacturing process compatibility.

The identified substitute BUK661R9-40C,118 shares the same voltage rating, package type, and operating temperature range. However, it exhibits reduced continuous drain current (120A versus 195A) and different gate drive characteristics, requiring application-level assessment.

Parameter Comparison

Engineering Selection Recommendations

Voltage and Package Compatibility: The BUK661R9-40C,118 maintains full compatibility with the IRFS3004PBF in terms of voltage rating (40V Vdss) and package form factor (D2PAK surface mount). Both devices operate across the identical temperature range (-55°C to 175°C).

Current Rating Differential: The substitute part is rated for 120A continuous drain current compared to the IRFS3004PBF's 195A. This represents a 38.5% reduction in current capacity. Applications requiring the full 195A specification cannot use this substitute without circuit redesign or parallel device configuration.

On-State Resistance Characteristics: The IRFS3004PBF specifies 1.75 mOhm at 195A and 10V gate drive, while the BUK661R9-40C,118 specifies 1.9 mOhm at 25A and 10V gate drive. Direct comparison at equivalent current levels is not possible from the provided data. The substitute exhibits higher input capacitance (15100 pF versus 9200 pF), which affects gate drive circuit requirements and switching speed.

Gate Drive Voltage: The BUK661R9-40C,118 has a maximum gate voltage rating of ±16V compared to the IRFS3004PBF's ±20V. Gate drive circuits designed for the original part must operate within the reduced ±16V envelope for the substitute.

Regulatory and Manufacturing Compliance: Both devices are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring equivalent regulatory status and manufacturing process compatibility. The substitute carries AEC-Q101 automotive qualification, which the main part does not specify.

Product Status: Both parts are discontinued or obsolete, indicating limited future availability. Selection should prioritize current inventory status and long-term supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can the BUK661R9-40C,118 directly replace the IRFS3004PBF in all applications?

A: Direct replacement is limited by current rating. The substitute supports 120A continuous drain current versus the original's 195A. Applications operating at or near 195A require circuit redesign or parallel device configuration. Applications operating below 120A may use the substitute with thermal margin verification.

Q: What is the impact of the higher input capacitance in the substitute part?

A: The BUK661R9-40C,118 has 15100 pF input capacitance compared to 9200 pF in the IRFS3004PBF. Higher input capacitance increases gate charge requirements and may slow switching transitions. Gate drive circuits must deliver sufficient current to charge the higher capacitance within the required switching time window.

Q: Are the gate drive voltage requirements compatible?

A: The substitute part has a maximum gate voltage of ±16V versus the original's ±20V. Gate drive circuits designed for ±20V operation must be verified to operate safely within the ±16V limit of the substitute. Exceeding ±16V on the substitute part may cause device damage.

Q: Does the substitute part have automotive qualification?

A: Yes, the BUK661R9-40C,118 carries AEC-Q101 automotive qualification. The IRFS3004PBF does not specify automotive qualification in the provided data. This qualification may be advantageous for automotive applications.

Q: What is the significance of the different gate threshold voltages?

A: The IRFS3004PBF specifies 4V gate threshold at 250µA, while the BUK661R9-40C,118 specifies 2.8V at 1mA. These measurements are taken at different current levels, making direct comparison difficult. Gate drive circuits must ensure sufficient overdrive voltage above the threshold to achieve full on-state performance.

Q: Are both parts available in the same packaging format?

A: Yes, both devices use the D2PAK (TO-263-3) surface mount package with identical pinout and thermal interface. PCB layout and thermal management designs are directly compatible.

Q: What is the difference in power dissipation capability?

A: The IRFS3004PBF is rated for 380W maximum power dissipation at the case temperature, while the BUK661R9-40C,118 is rated for 306W. The lower power dissipation rating of the substitute reflects its reduced current capability and affects thermal design margins.

Q: How do the RoHS and moisture sensitivity ratings compare?

A: Both parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), indicating identical regulatory status and unlimited shelf life without moisture bake-out requirements. Manufacturing and storage processes are equivalent.