AOZ8204KI Equivalent & Substitute Parts

Part Overview

The AOZ8204KI is a transient voltage suppressor (TVS) diode manufactured by Alpha & Omega Semiconductor Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 5V reverse standoff voltage with 7.5V clamping capability and 5A peak pulse current rating in an SC-89-6 package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component sourcing.

Substiute Parts

AOZ8204KI

Alpha & Omega Semiconductor Inc.In Stock: 6368AOZ8204KI Datasheet

Current PartRFQ

DSILC6-4P6

STMicroelectronicsIn Stock: 1424DSILC6-4P6 Datasheet

MFR RecommendedRFQ

UCLAMP0504A.TCT

SemtechIn Stock: 2665UCLAMP0504A.TCT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AOZ8204KI is determined by the following critical parameters:

• Reverse standoff voltage: 5V (Max)
• Breakdown voltage (Min): 6V
• Unidirectional channels: 4
• Surface-mount package compatibility: SOT-563 or SOT-666
• Mounting type: Surface Mount

The substitute parts listed below maintain compatibility with these core electrical and mechanical specifications. Variations in clamping voltage, peak pulse current, and capacitance are noted where they differ from the original part, as these parameters may affect circuit performance in specific applications.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing status, providing long-term component availability compared to the obsolete AOZ8204KI.

DSILC6-4P6 (STMicroelectronics) maintains the closest electrical profile to the original part with matching 5V reverse standoff and 6V breakdown specifications. This part features a steering diode topology with 120W peak pulse power rating and significantly lower capacitance (2pF @ 1MHz). The DSILC6-4P6 is ROHS3 compliant and available in SOT-666 packaging.

UCLAMP0504A.TCT (Semtech) provides higher performance specifications with 7A peak pulse current (versus 5A in the original) and 100W peak pulse power rating. The clamping voltage is specified at 12V, which is higher than the original 7.5V specification. This part operates across an extended temperature range (-55°C to 125°C) and is ROHS3 compliant. The UCLAMP0504A.TCT is supplied in SC-89 (SOT-666) packaging.

Selection between these substitutes depends on circuit requirements for clamping voltage, peak pulse current capacity, and capacitance characteristics. Both parts satisfy the core substitution criteria of 5V reverse standoff voltage, 6V breakdown voltage, 4-channel configuration, and surface-mount SOT-666 package compatibility.

Frequently Asked Questions (FAQ)

Q: Can the DSILC6-4P6 directly replace the AOZ8204KI in all applications?

A: The DSILC6-4P6 matches the core electrical specifications (5V reverse standoff, 6V breakdown, 4 channels) and package type (SOT-666). However, the DSILC6-4P6 uses a steering diode topology rather than a Zener topology, and clamping voltage is not specified. Verify circuit compatibility with your specific application requirements before substitution.

Q: What is the primary difference between the DSILC6-4P6 and UCLAMP0504A.TCT?

A: The DSILC6-4P6 is a steering diode with 120W peak pulse power and 2pF capacitance. The UCLAMP0504A.TCT is a Zener diode with 100W peak pulse power, 12V clamping voltage, and 60pF capacitance. The UCLAMP0504A.TCT also provides higher peak pulse current (7A versus unspecified for DSILC6-4P6) and an extended operating temperature range (-55°C to 125°C).

Q: Are both substitute parts available in the same package as the original AOZ8204KI?

A: Both substitute parts are available in SOT-666 packaging, which is compatible with the original SC-89-6 package specification. Verify PCB footprint compatibility with your design before implementation.

Q: Do the substitute parts meet RoHS compliance requirements?

A: Yes, both the DSILC6-4P6 and UCLAMP0504A.TCT are ROHS3 compliant. The original AOZ8204KI RoHS status is not specified.

Q: Which substitute part should I select for applications requiring lower capacitance?

A: The DSILC6-4P6 features 2pF capacitance at 1MHz, significantly lower than the original part's 15pF and the UCLAMP0504A.TCT's 60pF. Select the DSILC6-4P6 for high-frequency applications where capacitance must be minimized.

Q: Which substitute part should I select for applications requiring higher current handling?

A: The UCLAMP0504A.TCT is rated for 7A peak pulse current (8/20µs), compared to the original part's 5A rating. Select the UCLAMP0504A.TCT for applications requiring higher transient current suppression capability.