AOD442 N-Channel MOSFET 60V 7A/37A TO-252 Equivalent & Substitute Parts

Part Overview

The AOD442 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 60V drain-to-source voltage with continuous drain current of 7A at Ta (ambient temperature) and 37A at Tc (case temperature). The device is housed in a TO-252 (DPAK) surface mount package and is compliant with RoHS3 and REACH regulations. The AOD442 carries a product status of "Not For New Designs," indicating that while the part remains in inventory, new circuit designs should evaluate active alternative components. This reference page provides equivalent and substitute N-Channel MOSFETs that maintain compatibility with TO-252 packaging and 60V voltage rating specifications.

Key Parameters

Parameter	AOD442 Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	60	V
Continuous Drain Current @ 25°C (Ta)	7	A
Continuous Drain Current @ 25°C (Tc)	37	A
Rds On (Max) @ Id, Vgs	20 mOhm @ 20A, 10V	—
Gate Threshold Voltage Vgs(th) (Max)	2.7 V @ 250µA	—
Gate Charge (Qg) (Max) @ Vgs	68 nC @ 10V	—
Input Capacitance (Ciss) (Max)	2300 pF @ 30V	—
Power Dissipation (Max) @ Ta	2.1	W
Power Dissipation (Max) @ Tc	60	W
Operating Temperature Range	-55 to 175	°C
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AOD442 is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: All substitute parts maintain a minimum Vdss of 60V, with some rated higher (75V). This ensures the device operates within safe voltage margins in existing circuit topologies.

Package Compatibility: All substitute parts use TO-252-3 (DPAK) surface mount packaging with identical lead configuration (2 Leads + Tab, SC-63), ensuring direct PCB footprint compatibility without layout modifications.

Drain Current Rating: Substitute parts are grouped by their continuous drain current capacity at case temperature (Tc). The AOD442 specifies 37A at Tc; substitute parts range from 35A to 50A at Tc, providing equivalent or enhanced current handling capability.

On-Resistance (Rds On): Substitute parts maintain Rds On values between 16.5 mOhm and 23 mOhm at specified gate-source voltages, ensuring comparable switching losses and thermal performance.

Gate Charge (Qg) and Input Capacitance (Ciss): These parameters affect switching speed and gate drive requirements. Substitute parts maintain gate charge between 4.6 nC and 72 nC and input capacitance between 700 pF and 2300 pF, ensuring compatibility with existing gate drive circuits.

Regulatory Compliance: All substitute parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the AOD442 environmental specifications.

Product Status: Active substitute parts are prioritized for new designs, while the AOD442 is marked "Not For New Designs."

Parameter Comparison

Parameter	AOD442	AOD442G	DMNH6021SK3-13	FDD5680	IPD30N08S2L21ATMA1	IPD350N06LGBTMA1	NVD5C684NLT4G	PJD35N06A_L2_00001	STD35NF06LT4	STD35NF06T4
Manufacturer	Alpha & Omega	Alpha & Omega	Diodes Inc.	onsemi	Infineon	Infineon	onsemi	Panjit	STMicroelectronics	STMicroelectronics
Vdss (V)	60	60	60	60	75	60	60	60	60	60
Id @ Tc (A)	37	40	50	8.5	30	29	38	35	35	35
Rds On (mOhm)	20 @ 20A, 10V	18 @ 20A, 10V	23 @ 12A, 10V	21 @ 8.5A, 10V	20.5 @ 25A, 10V	35 @ 29A, 10V	16.5 @ 15A, 10V	21 @ 20A, 10V	17 @ 17.5A, 10V	20 @ 17.5A, 10V
Vgs(th) (V)	2.7 @ 250µA	2.7 @ 250µA	3 @ 250µA	4 @ 250µA	2 @ 80µA	2 @ 28µA	2.1 @ 250µA	2.5 @ 250µA	2.5 @ 250µA	4 @ 250µA
Qg (nC)	68 @ 10V	68 @ 10V	20.1 @ 10V	46 @ 10V	72 @ 10V	13 @ 5V	4.6 @ 4.5V	28 @ 10V	33 @ 4.5V	60 @ 10V
Ciss (pF)	2300 @ 30V	1920 @ 30V	1143 @ 25V	1835 @ 30V	1650 @ 25V	800 @ 30V	700 @ 25V	1680 @ 20V	1700 @ 25V	1300 @ 25V
Tj (°C)	-55 to 175	-55 to 150	-55 to 175	-55 to 150	-55 to 175	-55 to 175	-55 to 175	-55 to 150	-55 to 175	-55 to 175
Package	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3	TO-252AA	PG-TO252-3-11	PG-TO252-3	DPAK	TO-252	DPAK	DPAK
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	Yes (AEC-Q101)	—	—	—	Yes (AEC-Q101)	—	—	—

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): AOD442G is the manufacturer-recommended upgrade from Alpha & Omega Semiconductor Inc. It maintains identical voltage rating (60V), package (TO-252-3 DPAK), and gate charge specification (68 nC @ 10V), with improved drain current (40A vs. 37A at Tc) and lower on-resistance (18 mOhm vs. 20 mOhm). Product status is Active, making it suitable for new designs.

High Current Capability: DMNH6021SK3-13 (Diodes Incorporated) and NVD5C684NLT4G (onsemi) provide the highest drain current ratings (50A and 38A respectively at Tc). Both are Active products with AEC-Q101 automotive qualification. DMNH6021SK3-13 features significantly lower gate charge (20.1 nC) and input capacitance (1143 pF), reducing gate drive power requirements. NVD5C684NLT4G offers the lowest input capacitance (700 pF) and gate charge (4.6 nC), optimizing for high-frequency switching applications.

Balanced Performance: STD35NF06LT4 and STD35NF06T4 (STMicroelectronics, STripFET™ II series) provide 35A drain current with low on-resistance (17-20 mOhm) and moderate gate charge (33-60 nC). Both are Active products with extended temperature range (-55 to 175°C). STD35NF06LT4 supports ±16V gate voltage, while STD35NF06T4 supports ±20V.

Higher Voltage Rating: IPD30N08S2L21ATMA1 (Infineon OptiMOS™) is rated for 75V Vdss, providing additional voltage margin for applications with transient overvoltage conditions. It delivers 30A at Tc with low on-resistance (20.5 mOhm) and is Active with extended temperature range (-55 to 175°C).

Lower Current Applications: FDD5680 (onsemi PowerTrench®) is suitable for applications requiring lower continuous current (8.5A at Ta). It is Active with extended temperature range and moderate gate charge (46 nC).

Compliance Verification: All substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. DMNH6021SK3-13 and NVD5C684NLT4G carry AEC-Q101 automotive qualification, suitable for automotive and industrial applications requiring enhanced reliability screening.

Frequently Asked Questions (FAQ)

Q: Can AOD442G be used as a direct replacement for AOD442?

A: Yes. AOD442G is the manufacturer-recommended successor from Alpha & Omega Semiconductor Inc. Both devices share identical 60V Vdss rating, TO-252-3 DPAK package, and 68 nC gate charge specification. AOD442G provides improved performance with higher drain current (40A vs. 37A at Tc) and lower on-resistance (18 mOhm vs. 20 mOhm). AOD442G carries Active product status, making it the preferred choice for new designs.

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

A: Continuous drain current at Ta (ambient temperature, typically 25°C) represents the maximum current the device can sustain in free air without external cooling. Continuous drain current at Tc (case temperature) represents the maximum current when the device case is maintained at a specified temperature (typically 25°C) through active cooling or thermal management. Tc ratings are higher because case temperature control enables better heat dissipation. Circuit designers must select based on actual thermal conditions in the application.

Q: Are all substitute parts compatible with existing PCB layouts designed for AOD442?

A: All substitute parts use TO-252-3 (DPAK) surface mount packaging with identical lead configuration (2 Leads + Tab, SC-63). PCB footprints are mechanically compatible. However, electrical performance differences (gate charge, input capacitance, on-resistance) may require gate drive circuit evaluation. Devices with significantly different gate charge (e.g., NVD5C684NLT4G at 4.6 nC vs. AOD442 at 68 nC) may require gate driver adjustment to maintain switching speed and efficiency.

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

A: NVD5C684NLT4G (onsemi) offers the lowest on-resistance at 16.5 mOhm @ 15A, 10V. This reduces conduction losses and heat dissipation in high-current applications. However, on-resistance is specified at different current levels across parts; direct comparison requires normalizing to identical test conditions.

Q: What is the significance of gate charge (Qg) differences?

A: Gate charge determines the energy required to switch the MOSFET on and off. Lower gate charge (e.g., NVD5C684NLT4G at 4.6 nC) reduces gate drive power consumption and enables faster switching with lower-power gate drivers. Higher gate charge (e.g., IPD30N08S2L21ATMA1 at 72 nC) requires more robust gate drive circuits but may provide better noise immunity. Selection depends on gate driver capability and switching frequency requirements.

Q: Are automotive-qualified parts required for this application?

A: Automotive qualification (AEC-Q101) is required only for applications in automotive or safety-critical systems. DMNH6021SK3-13 and NVD5C684NLT4G carry AEC-Q101 qualification. For industrial or consumer applications, non-automotive parts are acceptable. Verify application requirements before selecting.

Q: What is the impact of different operating temperature ranges?

A: AOD442 supports -55 to 175°C junction temperature. Some substitutes (AOD442G, PJD35N06A_L2_00001, FDD5680) are limited to -55 to 150°C. This difference is significant only for applications operating near the upper temperature limit. For most applications, the 150°C limit is sufficient. Verify thermal design to ensure junction temperature remains within device specifications.

Q: Can IPD30N08S2L21ATMA1 (75V) be used in place of AOD442 (60V)?

A: Yes. Higher voltage rating (75V vs. 60V) provides additional safety margin for transient overvoltage conditions. The device is electrically compatible and maintains TO-252-3 package compatibility. However, higher voltage rating typically results in higher on-resistance and input capacitance, which may slightly increase switching losses. Use only if the application benefits from the additional voltage margin.

Q: What is the difference between TO-252AA and standard TO-252-3 DPAK?

A: TO-252AA and TO-252-3 DPAK are mechanically and electrically equivalent surface mount packages with identical lead configuration and PCB footprint. The designation difference reflects manufacturer nomenclature variations. FDD5680 uses TO-252AA designation; all other parts use TO-252-3 or DPAK designation. PCB compatibility is maintained across all variants.

Q: Which substitute part is best for high-frequency switching applications?

A: NVD5C684NLT4G offers the lowest gate charge (4.6 nC) and input capacitance (700 pF), minimizing switching losses and enabling operation at higher frequencies. DMNH6021SK3-13 also provides low gate charge (20.1 nC) and input capacitance (1143 pF). Both are suitable for high-frequency applications. Gate driver capability must be verified to ensure adequate drive current for the selected device.

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