FDMS2D4N03S N-Channel 30V 163A MOSFET Equivalent & Substitute Parts

Part Overview

The FDMS2D4N03S is an N-Channel MOSFET manufactured by onsemi, rated for 30V drain-to-source voltage with 163A continuous drain current at case temperature (Tc). This device is packaged in an 8-PQFN (5x6) surface mount configuration and is designed for high-current switching applications. The part is currently listed as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility across voltage ratings, current handling capability, thermal characteristics, and mounting requirements.

Substiute Parts

FDMS2D4N03S

onsemiIn Stock: 945FDMS2D4N03S Datasheet

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NTMFS4C022NT1G

onsemiIn Stock: 40449NTMFS4C022NT1G Datasheet

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DMTH3002LPS-13

Diodes IncorporatedIn Stock: 9203DMTH3002LPS-13 Datasheet

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RS1E350BNTB

Rohm SemiconductorIn Stock: 3283RS1E350BNTB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDMS2D4N03S is determined by the following critical parameters:

Voltage Rating Compatibility: All substitute parts must maintain the 30V Vdss rating to ensure safe operation within the same voltage domain.

Current Handling: Substitute parts must support continuous drain current ratings sufficient for the application. The FDMS2D4N03S delivers 163A at case temperature; substitutes are evaluated based on their Tc-rated current specifications.

On-Resistance (Rds On): The maximum on-resistance specification of 1.8 mOhm at specified conditions establishes the conduction loss baseline. Substitute parts with equal or lower Rds On values maintain thermal and efficiency characteristics.

Gate Charge and Input Capacitance: These parameters affect switching speed and gate drive requirements. Substitutes with comparable or lower values ensure compatible gate driver performance.

Thermal Characteristics: Power dissipation rating and operating temperature range must support the thermal environment of the application.

Package and Mounting: Surface mount compatibility and lead configuration must align with PCB layout and assembly processes.

Compliance and Status: Active product status and regulatory compliance (RoHS3, REACH) ensure long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

NTMFS4C022NT1G (onsemi): This part maintains the same 30V Vdss rating and offers 136A continuous drain current at case temperature, representing a 16.5% reduction from the FDMS2D4N03S. The on-resistance of 1.7 mOhm is marginally lower, and gate charge is significantly reduced at 45.2 nC, enabling faster switching response. The 5-DFN package differs from the original 8-PQFN configuration, requiring PCB layout modification. This substitute is suitable for applications where the reduced current rating is acceptable and where the smaller package footprint provides design benefits. Active product status ensures supply chain continuity.

DMTH3002LPS-13 (Diodes Incorporated): This device provides 100A continuous drain current at case temperature with a 30V Vdss rating. The on-resistance of 1.6 mOhm is the lowest among substitutes, and power dissipation capability reaches 136W at case temperature, exceeding the original part. The operating temperature range extends to 175°C, providing enhanced thermal margin. AEC-Q101 automotive qualification and PowerDI5060-8 packaging indicate suitability for demanding applications. The current rating represents a 38.7% reduction from the FDMS2D4N03S, limiting applicability to lower-current designs. Active product status and automotive-grade qualification support long-term availability.

RS1E350BNTB (Rohm Semiconductor): This part delivers 80A continuous drain current at case temperature with 30V Vdss rating. The on-resistance of 1.7 mOhm is comparable to other substitutes. Gate charge is elevated at 185 nC, and input capacitance reaches 7900 pF, both higher than the original part, potentially requiring gate driver adjustment. The 8-HSOP package differs from the original configuration. The current rating represents a 50.9% reduction from the FDMS2D4N03S, restricting use to lower-current applications. Active product status supports availability.

Selection Criteria: Choose NTMFS4C022NT1G for applications requiring the highest current capability among active substitutes with minimal on-resistance penalty. Select DMTH3002LPS-13 for automotive-qualified designs or applications requiring extended temperature operation. Use RS1E350BNTB only when current requirements do not exceed 80A and package compatibility can be accommodated. All substitutes are RoHS3 compliant with MSL 1 rating, ensuring regulatory and moisture handling compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can the NTMFS4C022NT1G directly replace the FDMS2D4N03S without PCB modification?

A: No. The NTMFS4C022NT1G uses a 5-DFN (5x6) package, while the FDMS2D4N03S uses an 8-PQFN (5x6) package. Although both are 5x6mm surface mount packages, the lead configurations differ, requiring PCB footprint redesign and layout adjustment.

Q: What is the current derating impact when substituting with DMTH3002LPS-13?

A: The DMTH3002LPS-13 provides 100A continuous drain current at case temperature, compared to 163A for the FDMS2D4N03S. This represents a 38.7% reduction in current capacity. Applications must be re-evaluated to confirm that 100A is sufficient for the intended use case.

Q: Does the RS1E350BNTB require different gate drive circuitry?

A: The RS1E350BNTB has a gate charge of 185 nC at 10V, compared to 88 nC for the FDMS2D4N03S. This higher gate charge may require increased gate drive current or extended switching times. Verify that existing gate driver circuitry can supply the necessary charge within acceptable switching frequency constraints.

Q: Are all substitute parts suitable for automotive applications?

A: Only the DMTH3002LPS-13 carries AEC-Q101 automotive qualification. The NTMFS4C022NT1G and RS1E350BNTB are industrial-grade components. For automotive applications, DMTH3002LPS-13 is the qualified choice.

Q: What is the thermal performance difference between substitutes?

A: The DMTH3002LPS-13 offers the highest power dissipation capability at 136W (Tc), followed by FDMS2D4N03S at 75W (Tc), NTMFS4C022NT1G at 64W (Tc), and RS1E350BNTB at 35W (Tc). Thermal design must account for these differences, particularly in high-power applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed—NTMFS4C022NT1G, DMTH3002LPS-13, and RS1E350BNTB—are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original FDMS2D4N03S specifications.

Q: Which substitute offers the best on-resistance performance?

A: The DMTH3002LPS-13 provides the lowest on-resistance at 1.6 mOhm (@ 25A, 10V), followed by NTMFS4C022NT1G and RS1E350BNTB, both at 1.7 mOhm. Lower on-resistance reduces conduction losses and heat generation.

Q: Can I use multiple lower-current substitutes in parallel to achieve the required current rating?

A: Parallel operation of MOSFETs requires careful design consideration of gate drive distribution, current sharing, and thermal management. This approach is not addressed by the provided specifications and requires detailed circuit analysis beyond the scope of direct substitution.