AOC2423 Equivalent & Substitute Parts

Part Overview

The AOC2423 is a P-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 20V drain-to-source voltage with 2A continuous drain current at 25°C. The device is housed in a 4-AlphaDFN (0.97x0.97) surface mount package and is designed for low-power switching applications requiring compact form factors.

The AOC2423 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

AOC2423

Alpha & Omega Semiconductor Inc.In Stock: 6997AOC2423 Datasheet

Current PartRFQ

FDZ661PZ

Fairchild SemiconductorIn Stock: 7909FDZ661PZ Datasheet

MFR RecommendedRFQ

PMCM4402UPEZ

Nexperia USA Inc.In Stock: 17191PMCM4402UPEZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AOC2423 P-Channel MOSFET is determined by the following critical parameters:

Electrical Compatibility Requirements:

• FET Type: P-Channel (required match)
• Drain to Source Voltage (Vdss): 20V minimum (equal or greater)
• Continuous Drain Current (Id): 2A minimum at 25°C (equal or greater)
• Gate Threshold Voltage (Vgs(th)): Compatible with 1.2V maximum specification
• Operating Temperature Range: -55°C to 150°C (TJ) minimum

Mechanical Compatibility Requirements:

• Mounting Type: Surface Mount (required match)
• Package Category: 4-pin small outline packages (4-AlphaDFN, 4-WLCSP acceptable)

The substitute parts FDZ661PZ and PMCM4402UPEZ meet or exceed all electrical parameters of the AOC2423 while maintaining surface mount compatibility. Both devices support the same voltage rating, exceed the current rating, and operate within the specified temperature range.

Parameter Comparison

Engineering Selection Recommendations

FDZ661PZ (Fairchild Semiconductor): The FDZ661PZ is classified as Active product status, ensuring continued availability and manufacturer support. This device exceeds the AOC2423 specifications in continuous drain current (2.6A vs. 2A) and power dissipation capability (1.3W vs. 600mW). The FDZ661PZ operates within the same temperature range (-55°C to 150°C) and maintains P-Channel MOSFET functionality. The 4-WLCSP package (0.8x0.8) is mechanically compatible with surface mount assembly processes. REACH compliance and EAR99 export classification are confirmed.

PMCM4402UPEZ (Nexperia USA Inc.): The PMCM4402UPEZ is classified as Obsolete product status. However, this device provides the highest continuous drain current rating (4.2A) among the substitute options, offering significant performance margin over the AOC2423. The 4-WLCSP package (0.78x0.78) is mechanically compatible with surface mount assembly. The device is RoHS3 compliant and REACH unaffected. Gate charge is reduced (6.2 nC vs. 10 nC), indicating improved switching characteristics. Power dissipation is rated at 400mW, which is lower than the AOC2423 specification.

For new designs and long-term supply chain requirements, FDZ661PZ is recommended due to active product status. For applications requiring maximum current capacity, PMCM4402UPEZ provides superior electrical performance despite obsolete classification.

Frequently Asked Questions (FAQ)

Q: Can the FDZ661PZ directly replace the AOC2423 in existing designs?

A: The FDZ661PZ is electrically compatible with the AOC2423 across all critical parameters: P-Channel type, 20V Vdss rating, and continuous drain current exceeding 2A. Both devices are surface mount components. The 4-WLCSP package (0.8x0.8) differs from the 4-AlphaDFN (0.97x0.97), requiring PCB layout verification to confirm pin-to-pin compatibility and thermal performance.

Q: What is the primary difference between the FDZ661PZ and PMCM4402UPEZ?

A: The FDZ661PZ is classified as Active product status with 2.6A continuous drain current and 1.3W power dissipation. The PMCM4402UPEZ is classified as Obsolete with 4.2A continuous drain current and 400mW power dissipation. Both devices meet the AOC2423 electrical requirements. The FDZ661PZ offers better long-term availability; the PMCM4402UPEZ offers higher current capacity.

Q: Are there package compatibility concerns when substituting the AOC2423?

A: The AOC2423 uses a 4-AlphaDFN (0.97x0.97) package. Both substitute parts use 4-WLCSP packages with slightly different dimensions (FDZ661PZ: 0.8x0.8; PMCM4402UPEZ: 0.78x0.78). PCB footprint redesign is required. Pin assignments must be verified against device datasheets to ensure correct gate, drain, and source connections.

Q: Does the maximum gate voltage (Vgs) difference affect substitution?

A: The AOC2423 specifies ±12V maximum gate voltage. Both substitute parts specify ±8V maximum gate voltage. If the application drives the gate beyond ±8V, the substitute parts are not suitable. Verify gate drive voltage in the application circuit before substitution.

Q: What is the impact of different Rds On specifications?

A: The AOC2423 specifies 80 mOhm @ 1A, 10V. The FDZ661PZ specifies 140 mOhm @ 2A, 4.5V. Lower on-resistance reduces power dissipation during conduction. The FDZ661PZ exhibits higher on-resistance at the specified test conditions, but this must be evaluated against the application's actual operating current and gate drive voltage to determine thermal impact.

Q: Are there compliance or certification differences between the parts?

A: All three devices are classified as EAR99 for export control. The AOC2423 and PMCM4402UPEZ are REACH Unaffected. The FDZ661PZ compliance documentation does not specify REACH status in the provided data. The PMCM4402UPEZ is RoHS3 compliant; RoHS status for the AOC2423 and FDZ661PZ is not specified in the provided data. Verify compliance requirements for your specific application and region.