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AOZ8818DI-05 Equivalent & Substitute Parts
Part Overview
The AOZ8818DI-05 is a 18V clamp, 12A peak pulse TVS diode manufactured by Alpha & Omega Semiconductor Inc., designed for transient voltage suppression in surface mount applications. This steering-type TVS diode features 4 unidirectional channels in a 10-DFN (2.5x1) package with a 5V reverse standoff voltage and 6V minimum breakdown voltage. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AOZ8818DI-05 |
| Manufacturer | Alpha & Omega Semiconductor Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Steering (Rail to Rail) |
| Unidirectional Channels | 4 |
| Voltage - Reverse Standoff (Typ) | 5V (Max) |
| Voltage - Breakdown (Min) | 6V |
| Voltage - Clamping (Max) @ Ipp | 18V |
| Current - Peak Pulse (10/1000µs) | 12A (100ns) |
| Power Line Protection | Yes |
| Mounting Type | Surface Mount |
| Package / Case | 10-UFDFN |
| Supplier Device Package | 10-DFN (2.5x1) |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute parts for the AOZ8818DI-05 are qualified based on the following electrical and mechanical parameters:
- Reverse standoff voltage: 5V to 5.5V range
- Breakdown voltage minimum: 6V
- Steering-type TVS diode configuration with 4 unidirectional channels
- Surface mount package in 10-DFN or equivalent footprint (10-UFDFN, 10-XFDFN, 10-DFNWB)
- Operating temperature range compatibility: -40°C minimum to 85°C or higher
- RoHS3 compliance and MSL Level 1 rating
The substitute parts listed below meet these core electrical and mechanical criteria, though individual clamping voltages and peak pulse currents vary based on specific application requirements.
Parameter Comparison
| Parameter | AOZ8818DI-05 | EGUARD0524P | IP4283CZ10-TBA,115 | IP4292CZ10-TBR,115 | IP4294CZ10-TBR,115 | PUSB3F96X |
|---|---|---|---|---|---|---|
| Manufacturer | Alpha & Omega Semiconductor Inc. | SMC Diode Solutions | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. |
| Product Status | Obsolete | Active | Active | Not For New Designs | Not For New Designs | Active |
| Type | Steering (Rail to Rail) | Steering (Rail to Rail) | Steering (Rail to Rail) | Steering (Rail to Rail) | Steering (Rail to Rail) | Steering (Rail to Rail) |
| Unidirectional Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Voltage - Reverse Standoff (Typ) | 5V (Max) | 5V (Max) | 5.5V | 5.5V | 5.5V | 5.5V (Max) |
| Voltage - Breakdown (Min) | 6V | 6V | 6V | 6V | 6V | 6V |
| Voltage - Clamping (Max) @ Ipp | 18V | 17V | 9.5V (Typ) | 4V (Typ) | 4.1V | 4.6V (Typ) |
| Current - Peak Pulse (10/1000µs) | 12A (100ns) | 7A (8/20µs) | 3.8A (8/20µs) | 4A (8/20µs) | 4A (8/20µs) | 5.2A (8/20µs) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 10-UFDFN | 10-UFDFN | 10-XFDFN | 10-XFDFN | 10-XFDFN | 10-XFDFN |
| Operating Temperature | -40°C ~ 125°C (TJ) | -55°C ~ 150°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
EGUARD0524P (SMC Diode Solutions) is the primary active substitute with the closest electrical performance to the AOZ8818DI-05. It maintains the 5V reverse standoff voltage, 6V breakdown voltage, and 4-channel steering configuration. The 17V clamping voltage and 7A peak pulse rating provide comparable protection levels. This part is currently in active production status with extended temperature range (-55°C to 150°C) and is ROHS3 compliant.
IP4283CZ10-TBA,115 (Nexperia USA Inc.) is an active alternative suitable for applications where lower clamping voltage (9.5V typical) is acceptable. This part is widely available with high inventory levels and maintains full compliance with RoHS3 standards.
PUSB3F96X (Nexperia USA Inc.) is an active substitute optimized for HDMI applications with a 4.6V typical clamping voltage and 5.2A peak pulse rating. This part offers good availability and active production status.
IP4292CZ10-TBR,115 and IP4294CZ10-TBR,115 (Nexperia USA Inc.) are classified as "Not For New Designs" and should be avoided for new development. These parts feature lower clamping voltages (4V and 4.1V respectively) and are suitable only for legacy system maintenance where exact electrical compatibility is required.
Frequently Asked Questions (FAQ)
Q: Can I directly replace AOZ8818DI-05 with any of these substitute parts?
A: Direct replacement depends on your circuit's voltage protection requirements. The AOZ8818DI-05 has an 18V clamping voltage, while most substitutes have lower clamping voltages (4V to 17V). Verify that the substitute part's clamping voltage is appropriate for your protected circuit. All listed substitutes share the same 5V reverse standoff voltage, 6V breakdown voltage, and 4-channel steering configuration.
Q: What is the difference between the 10-UFDFN and 10-XFDFN packages?
A: Both packages are 10-pin DFN variants with 2.5x1mm footprints suitable for surface mount assembly. The 10-UFDFN (used by AOZ8818DI-05 and EGUARD0524P) and 10-XFDFN (used by Nexperia parts) are mechanically compatible for PCB layout purposes. Verify with your PCB design tool and assembly partner for any minor footprint variations.
Q: Why does EGUARD0524P have a lower peak pulse current (7A) compared to AOZ8818DI-05 (12A)?
A: Peak pulse current ratings depend on the specific pulse waveform and duration. AOZ8818DI-05 is rated at 12A for 100ns pulses, while EGUARD0524P is rated at 7A for 8/20µs pulses. These different pulse profiles reflect different test standards and application scenarios. Select based on your actual transient pulse characteristics.
Q: Are all these parts RoHS3 compliant?
A: Yes, all listed substitute parts are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the AOZ8818DI-05.
Q: Should I use parts marked "Not For New Designs"?
A: IP4292CZ10-TBR,115 and IP4294CZ10-TBR,115 are designated "Not For New Designs" by the manufacturer. These parts should be used only for legacy system maintenance or repair where exact electrical compatibility with existing designs is required. For new designs, select from active status parts: EGUARD0524P, IP4283CZ10-TBA,115, or PUSB3F96X.
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