AO6402L N-Channel MOSFET 30V 5A Equivalent & Substitute Parts

Part Overview

The AO6402L is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with 5A continuous drain current in a 6-TSOP surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across an industrial temperature range of -55°C to 150°C (TJ) and dissipates up to 1.25W at ambient temperature.

Substiute Parts

AO6402L

Alpha & Omega Semiconductor Inc.In Stock: 9914AO6402L Datasheet

Current PartRFQ

NTGS4141NT1G

onsemiIn Stock: 35310NTGS4141NT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AO6402L is determined by electrical and mechanical compatibility across the following critical parameters:

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

Current Handling: The substitute part current rating must support the application's continuous drain current requirements. The AO6402L specifies 5A continuous drain current; substitute parts with lower current ratings (3.5A) are acceptable only when application current demands do not exceed the substitute's rating.

On-Resistance Characteristics: Rds On values determine power dissipation and thermal performance. Lower Rds On values indicate improved efficiency and reduced heat generation.

Gate Threshold Voltage: Vgs(th) determines gate drive requirements and switching behavior. Compatibility requires similar threshold voltage ranges to maintain consistent gate drive circuit performance.

Package and Mounting: Both the main part and substitute must use identical or mechanically compatible surface mount packages (6-TSOP/SOT-457 family) to ensure PCB layout compatibility.

Temperature Range: Operating temperature specifications must match or exceed the application's thermal requirements (-55°C to 150°C TJ).

Product Status and Compliance: Active product status ensures ongoing availability and manufacturing support. REACH and RoHS compliance certifications confirm regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: NTGS4141NT1G

The NTGS4141NT1G from onsemi is the manufacturer-recommended substitute for the obsolete AO6402L. This part maintains electrical compatibility across voltage rating (30V Vdss) and operating temperature range (-55°C to 150°C TJ). Both devices employ N-Channel MOSFET technology in 6-TSOP surface mount packages.

Application Suitability Criteria:

The NTGS4141NT1G is suitable for applications where continuous drain current requirements do not exceed 3.5A. The AO6402L is rated for 5A continuous drain current; applications requiring the full 5A rating must evaluate whether the substitute's 3.5A specification meets design margins.

Power dissipation compatibility requires verification. The AO6402L dissipates up to 1.25W; the NTGS4141NT1G is rated for 500mW maximum. Applications with thermal budgets exceeding 500mW must confirm that actual power dissipation remains within the substitute's specification.

Compliance and Availability:

The NTGS4141NT1G holds active product status with ongoing manufacturing support from onsemi, ensuring long-term procurement availability. The part is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The AO6402L, classified as obsolete, has no guaranteed future availability.

Package Compatibility:

Both parts use 6-TSOP surface mount packages. The AO6402L specifies SC-74 and SOT-457 designations; the NTGS4141NT1G specifies SOT-23-6 Thin and TSOT-23-6 designations. PCB footprint verification is required to confirm mechanical compatibility, as package variant designations may indicate dimensional differences.

Frequently Asked Questions (FAQ)

Q: Can the NTGS4141NT1G directly replace the AO6402L in all applications?

A: Direct replacement is possible only when application current requirements do not exceed 3.5A continuous drain current and power dissipation remains below 500mW. The AO6402L supports 5A and 1.25W; applications utilizing these higher ratings require design modification or alternative parts.

Q: What is the significance of the different gate threshold voltages (2.4V vs. 3V)?

A: Gate threshold voltage determines the gate-source voltage at which the MOSFET begins to conduct. The NTGS4141NT1G threshold of 3V is 0.6V higher than the AO6402L. Gate drive circuits must supply sufficient voltage to exceed this threshold. Verify that existing gate drive circuits can reliably drive the substitute part above its 3V threshold.

Q: Why does the NTGS4141NT1G have higher gate charge (12nC vs. 6.3nC)?

A: Gate charge represents the total charge required to switch the MOSFET from off to on state. Higher gate charge increases switching time and energy consumption in gate drive circuits. Applications with high-frequency switching or current-limited gate drive circuits must evaluate whether the doubled gate charge affects performance or power consumption.

Q: Are the 6-TSOP packages mechanically identical?

A: Both parts use 6-pin TSOP surface mount packages, but specific variant designations differ (SC-74/SOT-457 vs. SOT-23-6 Thin/TSOT-23-6). These designations may indicate dimensional variations. Obtain detailed package drawings from both manufacturers and verify PCB footprint compatibility before committing to production.

Q: What is the impact of the lower on-resistance in the NTGS4141NT1G?

A: The NTGS4141NT1G exhibits 25mOhm on-resistance compared to 31mOhm in the AO6402L. Lower on-resistance reduces power dissipation during conduction, improving efficiency. This characteristic is beneficial for thermal management, particularly in applications approaching the 500mW power dissipation limit.

Q: Is the higher input capacitance (560pF vs. 310pF) a concern?

A: Input capacitance affects gate drive circuit performance and switching speed. The NTGS4141NT1G input capacitance is approximately 1.8 times higher. High-frequency switching applications may experience slower switching transitions. Evaluate gate drive circuit capability to charge and discharge the higher capacitance within required switching time windows.

Q: Why is the AO6402L classified as obsolete?

A: Obsolete classification indicates the manufacturer has discontinued production and no longer guarantees availability. The NTGS4141NT1G, with active product status, ensures ongoing manufacturing support and procurement reliability for new designs and production continuity.

Q: Does RoHS3 compliance of the NTGS4141NT1G matter if the original design used the AO6402L?

A: RoHS3 compliance ensures the substitute part meets current environmental and regulatory standards. If your application or end-market requires RoHS compliance, the NTGS4141NT1G's ROHS3 certification confirms regulatory alignment. The AO6402L RoHS status is not specified in available documentation.