FDMS7676 N-Channel 30V MOSFET Equivalent & Substitute Parts

Part Overview

The FDMS7676 is an N-Channel 30V MOSFET manufactured by onsemi in the PowerTrench® series, housed in an 8-PQFN (5x6) surface mount package. This device is rated for 16A continuous drain current at 25°C ambient temperature and 28A at case temperature, with a maximum on-resistance of 5.5mOhm at 19A and 10V gate-source voltage. The FDMS7676 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Alternative devices must maintain compatibility across voltage ratings, current handling capability, thermal performance, and package form factor to ensure functional equivalence in existing circuit applications.

Substiute Parts

FDMS7676

onsemiIn Stock: 2409FDMS7676 Datasheet

Current PartRFQ

BSC020N03LSGATMA1

Infineon TechnologiesIn Stock: 2172BSC020N03LSGATMA1 Datasheet

DirectRFQ

BSC016N03MSGATMA1

Infineon TechnologiesIn Stock: 15883BSC016N03MSGATMA1 Datasheet

SimilarRFQ

BSC050N03LSGATMA1

Infineon TechnologiesIn Stock: 1000449BSC050N03LSGATMA1 Datasheet

SimilarRFQ

BSC057N03LSGATMA1

Infineon TechnologiesIn Stock: 1000142BSC057N03LSGATMA1 Datasheet

SimilarRFQ

CSD17304Q3

Texas InstrumentsIn Stock: 35835CSD17304Q3 Datasheet

SimilarRFQ

CSD17552Q5A

Texas InstrumentsIn Stock: 30124CSD17552Q5A Datasheet

SimilarRFQ

CSD17577Q5A

Texas InstrumentsIn Stock: 24187CSD17577Q5A Datasheet

SimilarRFQ

CSD17577Q5AT

Texas InstrumentsIn Stock: 3790CSD17577Q5AT Datasheet

SimilarRFQ

RS1E170GNTB

Rohm SemiconductorIn Stock: 16332RS1E170GNTB Datasheet

SimilarRFQ

STL90N3LLH6

STMicroelectronicsIn Stock: 7968STL90N3LLH6 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDMS7676 is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Voltage Rating: All substitute parts must maintain a Drain-Source Voltage (Vdss) of 30V to ensure compatibility with the original circuit design voltage specifications.

Current Handling: Substitute parts must support continuous drain current ratings at both ambient temperature (Ta) and case temperature (Tc) that meet or exceed the FDMS7676 specifications of 16A (Ta) and 28A (Tc).

On-Resistance (Rds On): The maximum on-resistance at specified gate-source voltage and drain current must be equal to or lower than the original 5.5mOhm specification to maintain thermal performance and power efficiency.

Gate Charge and Input Capacitance: These parameters affect switching speed and drive circuit requirements. Substitute parts with comparable or lower gate charge and input capacitance values ensure compatibility with existing gate drive circuits.

Package Form Factor: The 8-PQFN (5x6) package designation must be maintained or substituted with mechanically and electrically equivalent packages to ensure PCB layout compatibility.

Thermal Performance: Power dissipation ratings at both ambient and case temperatures must support the thermal requirements of the application.

Compliance and Status: Substitute parts must maintain RoHS3 compliance and preferably active product status to ensure long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: BSC050N03LSGATMA1 (Infineon OptiMOS™)

The BSC050N03LSGATMA1 provides the closest electrical match to the FDMS7676 with active product status. This device maintains the 30V voltage rating, exceeds the continuous drain current requirement at both ambient (18A vs. 16A) and case temperatures (80A vs. 28A), and delivers superior on-resistance performance (5mOhm vs. 5.5mOhm). The gate charge of 35nC and input capacitance of 2800pF are comparable to the original specification, ensuring compatibility with existing gate drive circuits. The PG-TDSON-8-5 package is mechanically equivalent to the 8-PQFN form factor. This part is actively manufactured and RoHS3 compliant, providing long-term supply assurance.

Secondary Substitute: CSD17552Q5A (Texas Instruments NexFET™)

The CSD17552Q5A offers active product status with 30V rating and 17A ambient current capability (exceeding the 16A requirement). The 8-VSONP (5x6) package maintains the original footprint dimensions. On-resistance of 6.2mOhm is slightly higher than the original but within acceptable tolerance. Gate charge of 12nC at 4.5V is significantly lower, reducing gate drive power requirements. Input capacitance of 2050pF is lower than the original, potentially improving switching speed. This device is suitable for applications where lower gate charge is beneficial.

Tertiary Substitute: BSC020N03LSGATMA1 (Infineon OptiMOS™)

The BSC020N03LSGATMA1 maintains active product status with 30V rating and substantially exceeds current requirements (28A ambient, 100A case). On-resistance of 2mOhm is significantly lower than the original, providing improved thermal efficiency. However, the gate charge of 93nC and input capacitance of 7200pF are substantially higher than the FDMS7676, requiring verification of gate drive circuit capability. The PG-TDSON-8-1 package is mechanically compatible. This part is recommended only when enhanced current handling and reduced on-resistance are critical design requirements.

Alternative Substitute: STL90N3LLH6 (STMicroelectronics STripFET™ VI)

The STL90N3LLH6 provides active product status with 30V rating and exceptional current handling (90A case temperature). On-resistance of 4.5mOhm is superior to the original. Gate charge of 17nC at 4.5V is significantly lower. The PowerFlat™ (5x6) package maintains the original footprint. This device is suitable for applications requiring enhanced thermal performance and lower gate drive power. Input capacitance of 1690pF is substantially lower than the original.

Not Recommended: BSC016N03MSGATMA1

This device carries a "Not For New Designs" status, making it unsuitable for new applications despite meeting electrical specifications. Existing designs currently using this part may continue operation, but migration to active alternatives is advised.

Not Recommended: BSC057N03LSGATMA1

This device is classified as obsolete, providing no advantage over the original FDMS7676 for long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the BSC050N03LSGATMA1 be used as a direct replacement for the FDMS7676 without PCB modifications?

A: The BSC050N03LSGATMA1 uses the PG-TDSON-8-5 package, which is mechanically equivalent to the 8-PQFN (5x6) form factor. Both packages maintain the same 5x6mm footprint and pin configuration, allowing direct PCB substitution without layout changes. Electrical parameters are compatible with the original design.

Q: What is the impact of higher gate charge in the BSC020N03LSGATMA1 compared to the FDMS7676?

A: The BSC020N03LSGATMA1 has a gate charge of 93nC versus 44nC in the FDMS7676. Higher gate charge requires more current from the gate drive circuit during switching transitions, increasing switching losses and potentially requiring a more robust gate driver. Verify that the existing gate drive circuit can supply sufficient current at the required switching frequency before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed in this document are RoHS3 compliant and maintain Moisture Sensitivity Level 1 (Unlimited), matching the original FDMS7676 specifications. All parts are suitable for lead-free soldering processes.

Q: Which substitute part offers the lowest on-resistance?

A: The BSC016N03MSGATMA1 provides the lowest on-resistance at 1.6mOhm, followed by the BSC020N03LSGATMA1 at 2mOhm. However, the BSC016N03MSGATMA1 carries a "Not For New Designs" status. For active products, the BSC020N03LSGATMA1 offers the best on-resistance performance.

Q: Can the CSD17304Q3 be used in applications requiring 28A case temperature current?

A: The CSD17304Q3 is rated for 56A case temperature current, which exceeds the 28A requirement. However, its ambient temperature rating of 15A is below the original 16A specification. This device is suitable only for applications where the actual operating current at ambient temperature remains below 15A.

Q: What is the significance of lower gate charge in the CSD17552Q5A and STL90N3LLH6?

A: Lower gate charge (12nC and 17nC respectively, versus 44nC in the original) reduces the charge that must be supplied by the gate driver during switching transitions. This results in lower switching losses, reduced gate driver power dissipation, and potentially faster switching speeds. These characteristics are beneficial in high-frequency switching applications.

Q: Are package dimensions identical between all substitute parts and the FDMS7676?

A: No. While all substitute parts maintain the 8-pin PowerTDFN package family, specific package variants differ. The BSC050N03LSGATMA1 and BSC020N03LSGATMA1 use TDSON packages, the CSD17552Q5A uses VSONP, the CSD17304Q3 uses VSON-CLIP, the RS1E170GNTB uses HSOP, and the STL90N3LLH6 uses PowerFlat™. All maintain 5x6mm footprints and are mechanically compatible with the original PCB layout.

Q: Which substitute part is recommended for new designs?

A: The BSC050N03LSGATMA1 is recommended for new designs due to its active product status, electrical compatibility, superior on-resistance, and proven long-term availability. The CSD17552Q5A and STL90N3LLH6 are also suitable alternatives with active status and specific performance advantages in switching speed and thermal efficiency.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts maintain the -55°C to 150°C operating temperature range, matching the original FDMS7676 specification. This ensures compatibility across the full temperature operating envelope of the original design.