AON7140 Equivalent & Substitute Parts

Part Overview

The AON7140 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 40V drain-to-source voltage with 50A continuous drain current at 25°C. This device is housed in a Surface Mount 8-DFN-EP (3.3x3.3) package and is designed for high-current switching applications requiring low on-resistance performance. The part maintains Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching critical electrical parameters including voltage rating, current capacity, on-resistance characteristics, and package compatibility. Substitutes enable design flexibility when primary components face supply constraints or when alternative manufacturers' specifications align with application requirements.

Substiute Parts

AON7140

Alpha & Omega Semiconductor Inc.In Stock: 60442AON7140 Datasheet

Current PartRFQ

NVTFS5C466NLTAG

onsemiIn Stock: 20308NVTFS5C466NLTAG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AON7140 MOSFET is determined by alignment of the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: The substitute part must maintain a Drain to Source Voltage (Vdss) rating of 40V to ensure safe operation within the same voltage domain.

Current Capacity: The substitute must support continuous drain current (Id) at 25°C equal to or greater than 50A to handle equivalent load conditions.

On-Resistance Characteristics: The Rds On (Max) specification determines switching losses and thermal performance. Substitutes must maintain comparable on-resistance values to preserve circuit efficiency.

Gate Charge and Threshold Voltage: Gate charge (Qg) and gate threshold voltage (Vgs(th)) affect switching speed and drive circuit requirements. These parameters must remain within acceptable ranges to ensure compatible gate driver operation.

Package and Mounting: The substitute must use the same 8-PowerWDFN (3.3x3.3) Surface Mount package to ensure PCB layout compatibility and thermal management characteristics.

Compliance and Status: Both the main part and substitute must maintain Active product status and ROHS3 compliance to meet regulatory and supply chain requirements.

The NVTFS5C466NLTAG from onsemi qualifies as a direct substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The AON7140 remains the primary choice when Alpha & Omega Semiconductor supply is available and cost is not a constraint. The part is Active, ROHS3 compliant, and carries unlimited moisture sensitivity rating.

Substitute Selection Criteria: The NVTFS5C466NLTAG from onsemi qualifies as a direct substitute based on matching voltage rating (40V), equivalent current capacity (51A vs. 50A), identical package geometry (8-PowerWDFN 3.3x3.3), and equivalent compliance status (ROHS3, MSL 1).

Automotive Applications: The NVTFS5C466NLTAG carries AEC-Q101 automotive qualification, making it the preferred choice for automotive-grade designs. The AON7140 does not specify automotive qualification.

Thermal Considerations: The AON7140 specifies 46W maximum power dissipation compared to 38W for the NVTFS5C466NLTAG. Applications operating near thermal limits should account for this difference in thermal design calculations.

Temperature Range: The NVTFS5C466NLTAG supports extended operating temperature to 175°C (TJ) versus 150°C (TJ) for the AON7140, providing additional margin for high-temperature environments.

On-Resistance Trade-off: The AON7140 exhibits lower on-resistance (2.3 mOhm @ 20A, 10V) compared to the NVTFS5C466NLTAG (7.3 mOhm @ 10A, 10V). Applications sensitive to conduction losses should evaluate this parameter difference.

Gate Charge: The NVTFS5C466NLTAG exhibits significantly lower gate charge (7 nC @ 4.5V) compared to the AON7140 (60 nC @ 10V), resulting in faster switching transitions and reduced gate driver power requirements.

Both parts maintain Active product status and are suitable for new designs. Selection between them depends on supply availability, thermal budget, automotive qualification requirements, and switching speed priorities.

Frequently Asked Questions (FAQ)

Q: Can the NVTFS5C466NLTAG directly replace the AON7140 on existing PCBs?

A: Yes. Both devices use identical 8-PowerWDFN (3.3x3.3) Surface Mount packages with the same pinout and thermal pad configuration. No PCB layout modifications are required for mechanical compatibility.

Q: What are the key electrical differences between these parts?

A: The primary differences are on-resistance (AON7140: 2.3 mOhm @ 20A, 10V; NVTFS5C466NLTAG: 7.3 mOhm @ 10A, 10V), gate charge (AON7140: 60 nC @ 10V; NVTFS5C466NLTAG: 7 nC @ 4.5V), and maximum power dissipation (AON7140: 46W; NVTFS5C466NLTAG: 38W). Both maintain 40V voltage rating and support 50A+ continuous drain current.

Q: Is the NVTFS5C466NLTAG suitable for automotive applications?

A: Yes. The NVTFS5C466NLTAG carries AEC-Q101 automotive qualification and is designated as an automotive-grade device. The AON7140 does not specify automotive qualification.

Q: How do gate charge differences affect circuit design?

A: Lower gate charge (NVTFS5C466NLTAG: 7 nC) reduces gate driver power dissipation and enables faster switching transitions compared to higher gate charge (AON7140: 60 nC). Gate driver selection and timing calculations must account for these differences.

Q: Are both parts RoHS compliant?

A: Yes. Both the AON7140 and NVTFS5C466NLTAG are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), meeting regulatory requirements for lead-free manufacturing.

Q: What is the temperature operating range difference?

A: The AON7140 operates from -55°C to 150°C (TJ), while the NVTFS5C466NLTAG extends to -55°C to 175°C (TJ). The NVTFS5C466NLTAG provides 25°C additional high-temperature margin.

Q: Which part should be selected for new designs?

A: Selection depends on application priorities. Choose AON7140 for lowest on-resistance and highest power dissipation budget. Choose NVTFS5C466NLTAG for automotive applications, extended temperature range, lower gate charge, and faster switching performance.

Q: Are there packaging differences between these parts?

A: Both parts use 8-PowerWDFN (3.3x3.3) Surface Mount packages. The AON7140 specifies 8-DFN-EP while the NVTFS5C466NLTAG specifies 8-WDFN, but both refer to the same physical package geometry and are mechanically interchangeable.