AOD528 N-Channel MOSFET 30V 17A/50A TO-252 Equivalent & Substitute Parts

Part Overview

The AOD528 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with continuous drain current of 17A (Ta) and 50A (Tc) in a surface mount TO-252 (DPAK) package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, thermal characteristics, and package form factor while meeting modern compliance and availability requirements.

Key Parameters

Parameter	AOD528 Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	17A (Ta), 50A (Tc)	A
Rds On (Max) @ Id, Vgs	5.4 mOhm @ 20A, 10V	mOhm
Vgs(th) (Max) @ Id	2.4V @ 250µA	V
Gate Charge (Qg) (Max) @ Vgs	18 nC @ 10V	nC
Input Capacitance (Ciss) (Max) @ Vds	1400 pF @ 15V	pF
Operating Temperature Range	−55 to 175	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AOD528 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Drain-to-Source Voltage (Vdss): Must equal or exceed 30V
Package Type: Must be TO-252-3 (DPAK) form factor
Mounting Type: Surface Mount
Continuous Drain Current (Id): Must support minimum 17A (Ta) or 50A (Tc) rating
Gate-Source Voltage (Vgs): Operating range must accommodate ±20V or greater
Operating Temperature: Must span −55°C to 175°C (TJ) minimum
Moisture Sensitivity: MSL 1 or MSL 3 acceptable for unlimited or 168-hour storage

Substitution Logic: All identified substitute parts maintain the 30V Vdss rating and TO-252-3 DPAK package configuration. Substitutes are grouped by current handling capability and on-resistance characteristics. Parts with higher continuous drain current ratings (80A, 160A) and lower on-resistance values provide enhanced thermal performance and reduced power dissipation, making them suitable for applications requiring improved efficiency. Parts with comparable current ratings (50A) offer direct functional equivalence with minimal circuit redesign.

Parameter Comparison

Parameter	AOD528	FDD8870	IPD050N03LGATMA1	IPD060N03LGATMA1	STD86N3LH5	STD96N3LLH6	TSM090N03ECP ROG	Unit
Vdss	30	30	30	30	30	30	30	V
Id (Tc)	50	160	50	50	80	80	50	A
Rds On (Max) @ 10V	5.4 @ 20A	3.9 @ 35A	5 @ 30A	6 @ 30A	5 @ 40A	4.2 @ 40A	9 @ 16A	mOhm
Vgs(th) (Max) @ 250µA	2.4	2.5	2.2	2.2	2.5	2.5	2.5	V
Qg (Max) @ Vgs	18 @ 10V	118 @ 10V	31 @ 10V	23 @ 10V	14 @ 5V	20 @ 4.5V	7.7 @ 4.5V	nC
Ciss (Max) @ 15V	1400	5160	3200	2400	1850	2200	680	pF
Operating Temperature (TJ)	−55 to 175	−55 to 175	−55 to 175	−55 to 175	to 175	to 175	to 150	°C
Package	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK	—
Product Status	Obsolete	Obsolete	Not For New Designs	Active	Active	Active	Active	—
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

Primary Recommendation: IPD060N03LGATMA1

The IPD060N03LGATMA1 (Infineon Technologies OptiMOS™ series) is the preferred substitute for new designs and ongoing production. This device maintains the 30V Vdss and 50A (Tc) continuous drain current specification of the AOD528 while offering active product status with full ROHS3 compliance. The part is currently in production with substantial inventory availability (25,100 units). Operating temperature range extends to 175°C (TJ), matching the AOD528 specification. Gate charge of 23 nC at 10V and input capacitance of 2400 pF at 15V provide switching characteristics suitable for direct circuit substitution.

Secondary Recommendation: STD96N3LLH6

The STD96N3LLH6 (STMicroelectronics DeepGATE™/STripFET™ VI series) provides enhanced current handling at 80A (Tc) with superior on-resistance of 4.2 mOhm at 40A, 10V. This part is active in production with AEC-Q101 automotive qualification and ROHS3 compliance. The lower on-resistance reduces power dissipation in high-current applications. Gate charge of 20 nC at 4.5V and input capacitance of 2200 pF at 25V support efficient switching operation.

Tertiary Recommendation: STD86N3LH5

The STD86N3LH5 (STMicroelectronics STripFET™ V series) offers 80A (Tc) continuous drain current with 5 mOhm on-resistance at 40A, 10V. This part carries AEC-Q101 automotive qualification and ROHS3 compliance with active product status. Gate charge of 14 nC at 5V provides low switching losses. Inventory availability is substantial (18,895 units).

Not Recommended for New Designs:

FDD8870 and IPD050N03LGATMA1 are classified as obsolete or not for new designs, respectively. While electrically compatible, these parts do not support long-term supply chain continuity.

TSM090N03ECP ROG operates at maximum junction temperature of 150°C, below the AOD528 specification of 175°C, limiting thermal margin in high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the IPD060N03LGATMA1 be used as a direct drop-in replacement for the AOD528?

A: Yes. Both devices share identical 30V Vdss rating, 50A (Tc) continuous drain current, TO-252-3 DPAK package configuration, and −55°C to 175°C operating temperature range. Gate-source voltage, threshold voltage, and thermal characteristics are compatible with existing circuit designs. No PCB layout modifications are required.

Q: What is the difference between the STD86N3LH5 and STD96N3LLH6?

A: Both parts are rated for 80A (Tc) continuous drain current in TO-252-3 DPAK packages. The STD96N3LLH6 features lower on-resistance (4.2 mOhm vs. 5 mOhm at 40A, 10V) and lower gate charge (20 nC vs. 14 nC), resulting in reduced power dissipation and faster switching. The STD96N3LLH6 is the preferred choice for efficiency-critical applications.

Q: Why does the FDD8870 have higher gate charge than other substitutes?

A: The FDD8870 is rated for 160A (Tc) continuous drain current, significantly exceeding the AOD528 specification. Higher current capability requires larger die area and increased gate charge (118 nC at 10V). This part is suitable for applications requiring substantially higher current handling but introduces additional gate drive requirements.

Q: Is the TSM090N03ECP ROG suitable for high-temperature applications?

A: The TSM090N03ECP ROG operates to 150°C (TJ) maximum, which is 25°C below the AOD528 specification of 175°C. This part is not suitable for applications requiring full 175°C thermal margin. Use STD86N3LH5, STD96N3LLH6, or IPD060N03LGATMA1 for high-temperature designs.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: The AOD528 carries MSL 1 (unlimited moisture sensitivity), indicating no moisture-related storage restrictions. The TSM090N03ECP ROG carries MSL 3 (168 hours), requiring controlled storage conditions. For applications with extended shelf life or humid storage environments, select MSL 1 rated parts: IPD060N03LGATMA1, IPD050N03LGATMA1, STD86N3LH5, STD96N3LLH6, or FDD8870.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification. The AOD528 product status does not specify RoHS compliance; however, all active and not-for-new-designs substitutes meet current environmental regulations.

Q: Can I use a higher-rated current device (80A or 160A) in place of the 50A AOD528?

A: Yes. Devices rated for higher continuous drain current (STD86N3LH5 at 80A, FDD8870 at 160A) are electrically compatible and provide enhanced thermal performance. These parts operate within the same voltage and temperature specifications. Higher current ratings do not create compatibility issues in circuits designed for the AOD528.

Q: What is the impact of different on-resistance values on circuit performance?

A: On-resistance (Rds On) directly affects power dissipation and thermal performance. Lower on-resistance reduces I²R losses. The STD96N3LLH6 (4.2 mOhm) dissipates less power than the AOD528 (5.4 mOhm) at equivalent current levels. For thermal-constrained applications, select parts with lower on-resistance ratings.

Q: Are gate charge differences significant for circuit design?

A: Gate charge affects switching speed and gate drive requirements. Lower gate charge (TSM090N03ECP ROG at 7.7 nC, STD86N3LH5 at 14 nC) enables faster switching with reduced gate drive power. Higher gate charge (FDD8870 at 118 nC) requires more robust gate drive circuits. For high-frequency switching applications, select parts with lower gate charge ratings.

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