AOD522P N-Channel MOSFET 30V 17A/46A TO-252 Equivalent & Substitute Parts

Part Overview

The AOD522P is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with continuous drain current of 17A at Ta (ambient temperature) and 46A at Tc (case temperature). The device is housed in a TO-252 (DPAK) surface mount package and is classified as Obsolete product status. Due to its obsolete classification, identifying equivalent and substitute parts is necessary for ongoing design support, production continuity, and component sourcing.

Substiute Parts

AOD522P

Alpha & Omega Semiconductor Inc.In Stock: 4548AOD522P Datasheet

Current PartRFQ

DMTH3004LK3-13

Diodes IncorporatedIn Stock: 2132DMTH3004LK3-13 Datasheet

MFR RecommendedRFQ

FDD8870

onsemiIn Stock: 3666FDD8870 Datasheet

MFR RecommendedRFQ

IRLR7833TRPBF

Infineon TechnologiesIn Stock: 17863IRLR7833TRPBF Datasheet

MFR RecommendedRFQ

NTD4965NT4G

onsemiIn Stock: 3976NTD4965NT4G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AOD522P are selected based on strict electrical and mechanical parameter compatibility within the N-Channel MOSFET category. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• FET Type: N-Channel (required)
• Technology: MOSFET (Metal Oxide) (required)
• Drain-to-Source Voltage (Vdss): 30V (required)
• Package Type: TO-252-3 (DPAK) or equivalent surface mount variant (required)
• Operating Temperature Range: -55°C to 175°C (required)
• Mounting Type: Surface Mount (required)

Performance Parameters (must meet or exceed):

• Continuous Drain Current (Id) @ 25°C: minimum 17A (Ta) or 46A (Tc)
• Rds(on) Max: must not exceed 5.2 mOhm @ specified conditions
• Gate Threshold Voltage (Vgs(th)): within ±20V gate voltage specification
• Input Capacitance (Ciss): acceptable range based on application requirements

The four substitute parts listed below satisfy all critical matching parameters and provide equivalent or superior electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

DMTH3004LK3-13 (Diodes Incorporated)

The DMTH3004LK3-13 is classified as Active product status, providing long-term availability and design support. This part meets all critical electrical parameters with improved Rds(on) performance (4.0 mOhm vs. 5.2 mOhm) and higher continuous drain current ratings (21A Ta, 75A Tc). The device is ROHS3 compliant and carries MSL 1 rating. Gate charge is elevated at 44 nC, which may impact switching speed in high-frequency applications. This substitute is suitable for applications requiring improved thermal performance and extended component lifecycle.

FDD8870 (onsemi)

The FDD8870 is classified as Obsolete, similar to the AOD522P. This part provides the lowest Rds(on) specification (3.9 mOhm) and highest continuous drain current capability (160A Tc), delivering superior thermal performance. However, gate charge is significantly elevated at 118 nC and input capacitance is 5160 pF, substantially higher than the AOD522P. The FDD8870 is ROHS3 compliant with MSL 1 rating. This substitute is appropriate for applications where thermal management is critical and switching frequency is not a limiting factor.

IRLR7833TRPBF (Infineon Technologies)

The IRLR7833TRPBF is classified as Not For New Designs, indicating limited future availability. This part delivers high continuous drain current (140A Tc) with moderate Rds(on) (4.5 mOhm) and gate charge (50 nC). The device is ROHS3 compliant with MSL 1 rating. Input capacitance is 4010 pF. This substitute is suitable for existing production support where component qualification has been completed, but not recommended for new design implementations.

NTD4965NT4G (onsemi)

The NTD4965NT4G is classified as Active product status, ensuring long-term availability and design support. This part provides the lowest gate charge specification (17.2 nC) and minimal input capacitance (1710 pF), closely matching the AOD522P electrical profile. Continuous drain current is slightly lower (13A Ta, 68A Tc) and Rds(on) is 4.7 mOhm. The device is ROHS3 compliant with MSL 1 rating. This substitute is optimal for applications prioritizing switching speed and gate drive efficiency while maintaining electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the AOD522P be directly replaced with any of these substitute parts?

A: All four substitute parts are electrically and mechanically compatible with the AOD522P based on matching Vdss (30V), FET type (N-Channel), package type (TO-252/DPAK variants), and operating temperature range (-55°C to 175°C). However, application-specific performance characteristics such as gate charge, input capacitance, and Rds(on) vary between substitutes. Circuit validation is required to confirm suitability for specific applications.

Q: What is the difference between Ta and Tc current ratings?

A: Ta represents continuous drain current at ambient temperature (25°C), while Tc represents continuous drain current at case temperature (25°C). Tc ratings are typically higher due to improved thermal coupling at the device case. Selection depends on the thermal management approach in the application circuit.

Q: Why does the DMTH3004LK3-13 have higher gate charge than the AOD522P?

A: Gate charge (Qg) is a function of device geometry and capacitance characteristics. The DMTH3004LK3-13 exhibits higher gate charge (44 nC vs. 18 nC) due to larger input capacitance (2370 pF vs. 1500 pF), which results from its higher current rating capability. This requires higher gate drive current but does not affect DC electrical compatibility.

Q: Is the NTD4965NT4G suitable for high-frequency switching applications?

A: The NTD4965NT4G exhibits the lowest gate charge (17.2 nC) and input capacitance (1710 pF) among the substitutes, making it the most suitable for high-frequency switching applications. Lower gate charge reduces switching losses and simplifies gate driver design.

Q: What is the significance of Product Status classifications?

A: Product Status indicates component lifecycle stage. Active parts ensure long-term availability and design support. Obsolete parts have limited or no future availability. Not For New Designs indicates the manufacturer no longer recommends the part for new applications. For new designs, Active status parts (DMTH3004LK3-13, NTD4965NT4G) are preferred.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all four substitute parts are ROHS3 compliant. The AOD522P does not specify RoHS status in the provided data. All substitutes carry MSL 1 (Unlimited) moisture sensitivity rating, matching the AOD522P specification.

Q: How do I select between multiple substitute options?

A: Selection depends on application requirements. For thermal performance priority, select FDD8870. For switching speed and gate drive efficiency, select NTD4965NT4G. For long-term availability with balanced performance, select DMTH3004LK3-13. For existing production support, IRLR7833TRPBF is acceptable if already qualified.

Q: Can package variants (TO-252-3 vs. TO-252AA vs. DPAK-3) be used interchangeably?

A: All substitute parts use TO-252 family packages (TO-252-3, TO-252AA, DPAK-3) with identical pinout and mechanical footprint compatibility. These variants are mechanically and electrically interchangeable in PCB layouts designed for TO-252 packages.