AOC2403 Equivalent & Substitute Parts

Part Overview

The AOC2403 is a P-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 20V drain-to-source voltage with 1.8A continuous drain current. The device is packaged in a 4-AlphaDFN (0.97x0.97) surface mount configuration and is designed for low-power switching applications requiring compact form factors.

The AOC2403 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

AOC2403

Alpha & Omega Semiconductor Inc.In Stock: 36312AOC2403 Datasheet

Current PartRFQ

FDG332PZ

onsemiIn Stock: 65241FDG332PZ Datasheet

MFR RecommendedRFQ

PMCM4402UPEZ

Nexperia USA Inc.In Stock: 17191PMCM4402UPEZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AOC2403 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• FET Type: P-Channel topology must be maintained
• Drain to Source Voltage (Vdss): Minimum 20V rating required
• Continuous Drain Current (Id): Minimum 1.8A at 25°C required
• Gate-Source Voltage (Vgs Max): ±8V maximum rating required
• Operating Temperature Range: -55°C to 150°C minimum required

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount required
• Package Classification: Compact form factors (4-pin or 6-pin configurations)

Compliance Criteria:

• Moisture Sensitivity Level: MSL 1 (Unlimited) preferred
• REACH Status: REACH Unaffected preferred
• ECCN Classification: EAR99 preferred

The substitute parts FDG332PZ and PMCM4402UPEZ satisfy all electrical requirements and maintain surface mount compatibility. Both parts exceed the minimum current rating and voltage specifications of the AOC2403, providing design margin for current-limited applications.

Parameter Comparison

Engineering Selection Recommendations

FDG332PZ (onsemi)

The FDG332PZ is the primary recommended substitute for the AOC2403. This device is classified as Active, ensuring long-term availability and supply chain stability. The FDG332PZ exceeds all electrical specifications of the AOC2403, with 2.6A continuous drain current compared to 1.8A, and maintains identical 20V Vdss and ±8V Vgs ratings. The device is ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements. The SC-88 package (6-TSSOP) is a standard industry footprint with established manufacturing and assembly processes. Power dissipation capability is increased to 750mW, providing additional thermal margin for applications with variable load conditions.

PMCM4402UPEZ (Nexperia USA Inc.)

The PMCM4402UPEZ is an alternative substitute offering the highest current rating at 4.2A continuous drain current. This device is suitable for applications requiring maximum current capacity within the 20V voltage class. The 4-WLCSP package (0.78x0.78) provides the most compact form factor among the three options. However, the PMCM4402UPEZ is classified as Obsolete, which may limit long-term availability. This part is ROHS3 Compliant and REACH Unaffected. Power dissipation is rated at 400mW, which is lower than the AOC2403 and FDG332PZ, making this device suitable for low-power applications with space constraints.

Selection Guidance

For new designs and ongoing production requiring maximum supply chain assurance, the FDG332PZ is the recommended choice due to its Active product status. For applications where the highest current capacity is required within a compact footprint, the PMCM4402UPEZ provides superior electrical performance, with the understanding that long-term availability may be limited due to its Obsolete classification.

Frequently Asked Questions (FAQ)

Q: Can the FDG332PZ be used as a direct replacement for the AOC2403 without circuit modifications?

A: The FDG332PZ meets all electrical requirements for substitution. However, the package footprint differs: the AOC2403 uses 4-AlphaDFN (0.97x0.97), while the FDG332PZ uses SC-88 (6-TSSOP). PCB layout modifications are required to accommodate the different pin configuration and package dimensions. Electrical performance is compatible.

Q: What is the primary advantage of the PMCM4402UPEZ over the FDG332PZ?

A: The PMCM4402UPEZ provides higher continuous drain current (4.2A versus 2.6A) and a more compact package footprint (4-WLCSP at 0.78x0.78 versus SC-88). The PMCM4402UPEZ is suitable for applications requiring maximum current density in minimal board space.

Q: Why is the AOC2403 classified as Obsolete?

A: The AOC2403 is listed as Obsolete by the manufacturer, indicating that production has been discontinued. Substitute parts are necessary to maintain design continuity and ensure component availability for ongoing production and field support.

Q: Are all three devices (AOC2403, FDG332PZ, PMCM4402UPEZ) compatible with the same gate drive voltage?

A: Yes. All three devices have identical Vgs (Max) ratings of ±8V, ensuring compatibility with standard gate drive circuits and control logic.

Q: What is the impact of the different package types on thermal performance?

A: The AOC2403 (4-AlphaDFN) and PMCM4402UPEZ (4-WLCSP) are both compact 4-pin packages with similar thermal characteristics. The FDG332PZ (SC-88, 6-TSSOP) has a larger footprint, which may provide slightly improved thermal dissipation due to increased lead frame surface area. Power dissipation ratings (450mW, 750mW, and 400mW respectively) reflect the thermal design of each package.

Q: Are there any compliance or regulatory differences between these devices?

A: All three devices are REACH Unaffected and classified as EAR99 for export control purposes. The FDG332PZ is ROHS3 Compliant. The AOC2403 and PMCM4402UPEZ do not specify RoHS compliance status in the provided data. All devices have MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Which substitute part should be selected for a new design?

A: The FDG332PZ is recommended for new designs due to its Active product status, ensuring long-term availability and manufacturer support. The device exceeds all electrical specifications of the AOC2403 and meets current regulatory requirements.