AOL1428 Equivalent & Substitute Parts

Part Overview

The AOL1428 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with a continuous drain current of 12.4A at Ta (25°C ambient temperature). The device is housed in an UltraSO-8™ surface mount package and is designed for applications requiring efficient switching and power conversion in compact form factors.

The AOL1428 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 systems utilizing this component.

Substiute Parts

AOL1428

Alpha & Omega Semiconductor Inc.In Stock: 15976AOL1428 Datasheet

Current PartRFQ

SIR464DP-T1-GE3

Vishay SiliconixIn Stock: 37648SIR464DP-T1-GE3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AOL1428 is based on electrical and mechanical compatibility within the N-Channel MOSFET category. The following parameters establish the substitution criteria:

Electrical Compatibility Parameters:

• Drain-to-Source Voltage (Vdss) must equal or exceed 30V
• Gate Threshold Voltage (Vgs(th)) must be compatible at the specified operating point
• Maximum Gate Voltage (Vgs Max) must accommodate ±20V
• Operating temperature range must support the application requirements

Mechanical Compatibility Parameters:

• Surface mount package configuration
• Pin configuration compatible with UltraSO-8™ or equivalent SO-8 derivatives
• Moisture Sensitivity Level (MSL) rating of 1 or better

Performance Considerations:

• Continuous drain current rating must meet or exceed application requirements
• RDS(on) characteristics must be suitable for the intended switching application
• Gate charge and input capacitance affect switching speed and drive requirements

The SIR464DP-T1-GE3 meets these substitution criteria through equivalent voltage ratings, compatible gate characteristics, and surface mount SO-8 package configuration.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The AOL1428 is classified as obsolete, making the SIR464DP-T1-GE3 the appropriate substitute for ongoing production and design continuity. The SIR464DP-T1-GE3 is active and available in production quantities.

Compliance and Certification: Both parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99), ensuring regulatory compliance is maintained during substitution. Both devices carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints for storage and handling.

Electrical Equivalence: The SIR464DP-T1-GE3 provides equivalent voltage ratings (30V Vdss) and gate threshold characteristics (2.5V Vgs(th)), ensuring gate drive compatibility. The substitute part delivers superior continuous drain current (50A Tc versus 49A Tc) and improved RDS(on) performance (3.1 mOhm versus 9.5 mOhm), resulting in lower conduction losses and reduced thermal dissipation requirements.

Package and Mechanical Compatibility: Both devices are surface mount N-Channel MOSFETs in SO-8 package derivatives. The SIR464DP-T1-GE3 uses PowerPAK® SO-8 configuration, which maintains pin compatibility with the UltraSO-8™ package of the AOL1428 for standard PCB layouts.

Operating Temperature Range: The AOL1428 supports -55°C to 175°C operation, while the SIR464DP-T1-GE3 supports -55°C to 150°C. Applications requiring operation above 150°C require design review to confirm the substitute part meets thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the SIR464DP-T1-GE3 directly replace the AOL1428 in existing designs?

A: The SIR464DP-T1-GE3 is electrically and mechanically compatible with the AOL1428 for most applications. Both devices share 30V Vdss rating, identical gate threshold voltage (2.5V), and compatible ±20V gate voltage specifications. The SO-8 package configuration supports standard PCB layouts. However, applications operating above 150°C require verification, as the SIR464DP-T1-GE3 maximum junction temperature is 150°C compared to the AOL1428 at 175°C.

Q: What are the key electrical differences between these parts?

A: The SIR464DP-T1-GE3 provides improved RDS(on) performance (3.1 mOhm at 15A, 10V versus 9.5 mOhm at 20A, 10V), resulting in lower conduction losses. The substitute part exhibits higher gate charge (95 nC versus 18 nC) and input capacitance (3545 pF versus 1000 pF), which may affect gate drive circuit design and switching speed characteristics. Continuous drain current ratings are equivalent (50A Tc versus 49A Tc).

Q: Are there packaging considerations for PCB layout?

A: Both parts use surface mount SO-8 package configurations. The AOL1428 uses UltraSO-8™ while the SIR464DP-T1-GE3 uses PowerPAK® SO-8. Pin assignments and lead spacing are compatible for standard SO-8 footprints. PCB layout review is recommended to confirm thermal management provisions are adequate for the substitute part's higher power dissipation capability (69W Tc versus 43W Tc).

Q: What is the impact of higher gate charge on circuit design?

A: The SIR464DP-T1-GE3 gate charge of 95 nC (versus 18 nC for AOL1428) requires higher gate drive current or longer switching times to achieve the same gate voltage slew rate. Gate drive circuits must supply sufficient current to charge the gate capacitance within the application's switching frequency requirements. Input capacitance is also higher (3545 pF versus 1000 pF), affecting input impedance and drive circuit design.

Q: Are both parts compliant with environmental and regulatory requirements?

A: Both the AOL1428 and SIR464DP-T1-GE3 are REACH Unaffected and classified as EAR99 for export control purposes. Both carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints. Regulatory compliance is maintained during substitution.

Q: What is the availability status of each part?

A: The AOL1428 is obsolete with 15,873 pieces in stock. The SIR464DP-T1-GE3 is active with 37,600 pieces available in Tape & Reel packaging, ensuring long-term supply chain availability for production requirements.