AOZ8818DI-03 Equivalent & Substitute Parts

Part Overview

The AOZ8818DI-03 is a steering TVS diode designed for transient voltage suppression in general-purpose applications. This 4-channel, unidirectional device features a 3.3V reverse standoff voltage and 17.5V maximum clamping voltage, housed in a 10-DFN (2.5x1) surface mount package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility while meeting current design requirements.

Substiute Parts

AOZ8818DI-03

Alpha & Omega Semiconductor Inc.In Stock: 12605AOZ8818DI-03 Datasheet

Current PartRFQ

IP4283CZ10-TBA,115

Nexperia USA Inc.In Stock: 663638IP4283CZ10-TBA,115 Datasheet

MFR RecommendedRFQ

IP4292CZ10-TBR,115

Nexperia USA Inc.In Stock: 5804IP4292CZ10-TBR,115 Datasheet

MFR RecommendedRFQ

IP4294CZ10-TBR,115

Nexperia USA Inc.In Stock: 42946IP4294CZ10-TBR,115 Datasheet

MFR RecommendedRFQ

PUSB3F96X

Nexperia USA Inc.In Stock: 105230PUSB3F96X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AOZ8818DI-03 is determined by the following critical parameters:

• Type & Configuration: Steering (Rail to Rail) TVS diode with 4 unidirectional channels
• Voltage Rating: Reverse standoff voltage and breakdown voltage compatibility
• Clamping Performance: Maximum clamping voltage at peak pulse current
• Peak Pulse Current: Transient suppression capability at specified pulse duration
• Package Compatibility: Surface mount DFN package with matching pin configuration
• Thermal Range: Operating temperature specification

The substitute parts listed below maintain the core steering TVS diode architecture and surface mount DFN packaging. However, voltage and current ratings differ across candidates, requiring application-specific evaluation based on circuit protection requirements.

Parameter Comparison

Engineering Selection Recommendations

Active Status Preference: IP4283CZ10-TBA,115 and PUSB3F96X are classified as Active products and are recommended for new designs. IP4292CZ10-TBR,115 and IP4294CZ10-TBR,115 are marked as Not For New Designs and should be avoided in new development.

Voltage Rating Considerations: The AOZ8818DI-03 operates at 3.3V reverse standoff with 17.5V clamping. All substitute parts operate at 5.5V reverse standoff with significantly lower clamping voltages (4V to 9.5V). This represents a fundamental difference in voltage protection class and requires circuit-level compatibility assessment.

Current Handling: The AOZ8818DI-03 provides 12A peak pulse current at 100ns pulse duration. Substitute parts deliver 3.8A to 5.2A at 8/20µs pulse duration. The different pulse specifications and lower current ratings indicate these parts are designed for different transient protection scenarios.

Temperature Range: The AOZ8818DI-03 supports -40°C to 125°C (junction temperature). All substitutes operate to -40°C to 85°C (ambient temperature), representing a narrower thermal envelope.

Compliance: All parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can IP4283CZ10-TBA,115 directly replace AOZ8818DI-03?

A: Direct replacement is not recommended. While both are 4-channel steering TVS diodes in surface mount DFN packages, the voltage ratings differ significantly. The AOZ8818DI-03 is rated for 3.3V standoff with 17.5V clamping, while IP4283CZ10-TBA,115 operates at 5.5V standoff with 9.5V clamping. Application compatibility depends on the specific circuit protection requirements.

Q: What is the difference between the DFN package variants?

A: The AOZ8818DI-03 uses 10-UFDFN packaging, while substitute parts use 10-XFDFN. Both are 10-pin DFN packages with similar footprints suitable for surface mount assembly. Pin configuration compatibility must be verified against schematic requirements.

Q: Why do the substitute parts have lower peak pulse current ratings?

A: The AOZ8818DI-03 specifies 12A at 100ns pulse duration, while substitutes specify 3.8A to 5.2A at 8/20µs pulse duration. These represent different transient protection classes. The 8/20µs pulse is a standard industrial test waveform, while 100ns represents faster transient events. Selection depends on the actual transient threat profile in the application.

Q: Are all substitute parts suitable for new designs?

A: No. IP4283CZ10-TBA,115 and PUSB3F96X are Active products suitable for new designs. IP4292CZ10-TBR,115 and IP4294CZ10-TBR,115 are marked Not For New Designs and should not be selected for new development.

Q: What is the thermal difference between AOZ8818DI-03 and substitutes?

A: The AOZ8818DI-03 operates to 125°C junction temperature, while all substitutes operate to 85°C ambient temperature. This represents a 40°C difference in maximum operating temperature, which may impact performance in high-temperature environments.

Q: Do all parts maintain the same compliance certifications?

A: Yes. All parts listed are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and storage requirements.