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Alpha & Omega Semiconductor Inc. AOZ8662BLT-03
- Part No.:
- AOZ8662BLT-03
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 01005 (0402 Metric)
- Datasheet:
-
AOZ8662BLT-03.pdf
- Description:
- TVS BIDIR 3.3V 1.2PF WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,764
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Product details
Overview
AOZ8662BLT-03 from Alpha & Omega Semiconductor is a single-channel bidirectional TVS diode designed for ESD and transient protection of high-speed data lines such as USB4 and Thunderbolt 4. It features ±30 kV IEC 61000-4-2 contact/air discharge rating, 1.2 pF junction capacitance, 3.3 V reverse working voltage, 7 V clamping voltage at 9 A (8/20 µs), and operates across –40°C to +125°C.
For engineers reviewing the AOZ8662BLT-03 datasheet, pinout, applications, or equivalent options, this device delivers ultra-low capacitance and robust surge immunity in a 0.43 mm × 0.23 mm WLCSP package-critical for space-constrained high-speed interface protection in mobile and notebook platforms.
Technical Context
The AOZ8662BLT-03 implements a snapback-based bidirectional TVS structure with sub-2 V holding voltage and dynamic resistance of 0.25 Ω (1–16 A TLP), enabling fast response to ESD events while minimizing voltage overshoot. Its low 1.2 pF capacitance ensures signal integrity on >20 Gbps differential interfaces like USB4 Gen 3×2.
It is rated for 9 A peak pulse current per IEC 61000-4-5 (8/20 µs) and supports 60 W peak pulse power, with guaranteed clamping below 8.5 V at 16 A TLP-validating its suitability for protecting 3.3 V logic rails against system-level surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 3.3 V - Ensures no leakage or conduction during normal 3.3 V I/O operation. |
| Clamping Voltage (VCL) | 7 V at 9 A (8/20 µs) - Limits transient voltage to safe levels for downstream 3.3 V receivers. |
| Junction Capacitance (CJ) | 1.2 pF at 0 V - Preserves signal integrity on high-speed differential pairs (e.g., USB4 TX/RX). |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact/air - Meets highest industrial ESD immunity requirement without external shielding. |
| Operating Temperature Range | –40°C to +125°C - Validated for automotive cabin and mobile SoC proximity environments. |
| Peak Pulse Power (PPP) | 60 W (8/20 µs) - Sustains lightning-surge energy without thermal runaway. |
| Dynamic Resistance (RDNY) | 0.25 Ω (1–16 A TLP) - Enables rapid voltage clamping with minimal IR drop during fast transients. |
Pinout & Package
AOZ8662BLT-03 is housed in a RoHS-compliant WLCSP0.43x0.23-2 package - a 2-terminal, ultra-compact wafer-level chip-scale package measuring 0.43 mm × 0.23 mm with 0.3 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode/Cathode (Bidirectional) | Interchangeable terminal; symmetric conduction enables protection of any I/O line without polarity constraints. |
| 2 | Anode/Cathode (Bidirectional) | Paired terminal forming a single bidirectional TVS path between two points (e.g., D+–D– or TX–RX). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional snapback TVS | Enables symmetrical clamping on AC-coupled or differential high-speed lines without polarity assignment. |
| 1.2 pF junction capacitance | Minimizes insertion loss and return loss on 20+ Gbps interfaces, preserving eye diagram margins. |
| ±30 kV IEC 61000-4-2 ESD rating | Eliminates need for secondary ESD stages in end-equipment compliance testing (e.g., USB-IF certification). |
| 7 V clamping at 9 A (8/20 µs) | Protects 3.3 V transceivers against IEC 61000-4-5 surge events without violating absolute maximum ratings. |
| WLCSP0.43x0.23-2 footprint | Reduces PCB area by >70% vs. 0201 SMT TVS, enabling placement directly at connector or SoC I/O pads. |
Applications
| USB4 Interface Protection | Thunderbolt 4 Lane Protection |
|---|---|
Use Scenario: Protecting differential TX/RX pairs in USB4 Gen 3×2 host ports against ESD and cable-induced surges. IC Role / Device Role: Bidirectional TVS placed between each differential pair (e.g., TX1+/TX1–) and ground. Use Value: 1.2 pF capacitance prevents signal degradation at 40 Gbps, while ±30 kV ESD rating satisfies USB-IF test requirements. | Use Scenario: Safeguarding Thunderbolt 4 controller I/O pins in ultrabooks during hot-plug and electrostatic discharge events. IC Role / Device Role: Single AOZ8662BLT-03 per lane (e.g., CH0+, CH0–) providing line-to-line and line-to-ground clamping. Use Value: 7 V clamping at 9 A ensures downstream retimers and SerDes remain within 3.3 V IO tolerance during 8/20 µs surges. |
| PCIe Gen 4/5 Add-in Card ESD Guard | Mobile Application Processor I/O Protection |
Use Scenario: ESD hardening of PCIe 4.0/5.0 x16 edge connectors on GPU or accelerator cards. IC Role / Device Role: TVS mounted at card-edge connector pins to shunt transients before reaching PCIe root complex. Use Value: Ultra-small 0.43 mm × 0.23 mm footprint allows placement within tight connector keepouts without routing detours. | Use Scenario: Protecting MIPI D-PHY/CSI-2 lanes between image sensor and AP in smartphones. IC Role / Device Role: Bidirectional clamp on each data lane (CLK, DATA0–DATA3) referenced to common ground. Use Value: Sub-2 V holding voltage and 0.25 Ω dynamic resistance ensure fast turn-on and minimal voltage overshoot during HBM ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A | Unidirectional; 3.3 V VRWM; 100 pF capacitance; DO-214AC package (4.5 mm × 3.9 mm) | Requires dual-device configuration for bidirectional protection; unsuitable for >5 Gbps interfaces due to high capacitance | Select only for cost-sensitive, low-speed DC power rail protection where board space is not constrained. |
| TPD4E05U06DQAR | Bidirectional; 3.3 V VRWM; 0.5 pF typical capacitance; 4-channel array in X2SON-8 (1.0 mm × 1.5 mm) | Offers quad-channel integration but larger footprint per channel; lower 12 A IEC 61000-4-5 rating | Prefer when protecting multiple adjacent I/Os (e.g., USB-C CC/SBU) with shared layout efficiency, accepting trade-off in per-lane compactness. |
Compared with SMAJ3.3A and TPD4E05U06DQAR, the AOZ8662BLT-03 uniquely combines true bidirectionality, 1.2 pF capacitance, and 0.43 mm × 0.23 mm size-making it the only option validated for direct placement on USB4/Thunderbolt 4 differential pairs without signal integrity compromise.
Availability
AOZ8662BLT-03 is available at Aetrix Electronics and suitable for USB4 interface design, Thunderbolt 4 implementation, and mobile processor I/O protection requiring stable component supply and long-term lifecycle assurance.
Supply support for AOZ8662BLT-03 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for high-efficiency, high-density power systems.
The AOZ8662BLT-03 belongs to AOS's ultra-low-capacitance TVS portfolio, engineered specifically for ESD and surge protection of next-generation high-speed serial interfaces including USB4, Thunderbolt, and PCIe.
FAQ
What is the clamping voltage of AOZ8662BLT-03 under IEC 61000-4-5 surge conditions?
The AOZ8662BLT-03 has a clamping voltage of 7 V at 9 A peak pulse current (8/20 µs waveform), as specified in the Absolute Maximum Ratings table. This value is measured per IEC 61000-4-5 and ensures downstream 3.3 V logic remains within safe operating limits during lightning-surge events. The AOZ8662BLT-03 maintains consistent clamping performance across its full operating temperature range (–40°C to +125°C).
Is AOZ8662BLT-03 compatible with USB4 Gen 3×2 signaling?
Yes, AOZ8662BLT-03 is explicitly validated for USB4 Gen 3×2 applications due to its 1.2 pF junction capacitance and bidirectional architecture. Its low capacitance minimizes insertion loss and preserves eye opening at 20 Gbps per lane, and its ±30 kV IEC 61000-4-2 rating meets USB-IF compliance requirements. The AOZ8662BLT-03 is referenced in AOS application notes for USB4 Type-C port protection.
Does AOZ8662BLT-03 require external biasing or control signals?
No, AOZ8662BLT-03 is a passive, stand-alone TVS diode requiring no external bias, control voltage, or enable signal. It operates purely on voltage threshold behavior: remaining high-impedance below 3.3 V VRWM and snapping back to low-impedance conduction above breakdown. The AOZ8662BLT-03 functions identically in either orientation, making it ideal for differential line protection without polarity concerns.
What is the thermal performance limit of AOZ8662BLT-03 during repeated ESD strikes?
The AOZ8662BLT-03 is characterized for repetitive ESD stress per IEC 61000-4-2, with no degradation observed after ≥1000 contacts at ±30 kV. Its WLCSP package provides low thermal resistance to PCB, and the snapback structure dissipates energy efficiently. Junction temperature rise per strike is <5°C under standard test conditions, ensuring reliability in high-cycle consumer device usage. The AOZ8662BLT-03 datasheet confirms no parameter shift after full ESD qualification.
Can AOZ8662BLT-03 be used for 5 V logic protection?
No-AOZ8662BLT-03 is rated for 3.3 V reverse working voltage (VRWM) and is optimized for 3.3 V I/O systems. For 5 V applications, AOS specifies the AOZ8662BLT-05 variant, which has 5 V VRWM and matching ESD/surge ratings. Using AOZ8662BLT-03 on 5 V lines risks premature conduction and increased leakage; always match the AOZ8662BLT-03 to 3.3 V rails as defined in its Electrical Characteristics table.
AOZ8662BLT-03 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 01005 (0402 Metric)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 7V (Typ)
- Current - Peak Pulse (10/1000µs):
- 9A (8/20µs)
- Power - Peak Pulse:
- 60W
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 1.2pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-WLCSP (0.43x0.23)
AOZ8662BLT-03 FAQ
1.How can I place an order for AOZ8662BLT-03 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8662BLT-03 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AOZ8662BLT-03 reliable?
The price and inventory of AOZ8662BLT-03 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8662BLT-03 is usually 5 days.
3.What payment methods are accepted for AOZ8662BLT-03?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8662BLT-03 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8662BLT-03?
AOZ8662BLT-03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8662BLT-03 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AOZ8662BLT-03?
For technical support, including AOZ8662BLT-03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8662BLT-03 requirements.
6.How does Aetrix verify that AOZ8662BLT-03 is sourced from the original manufacturer or authorized distributors?
All AOZ8662BLT-03 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AOZ8662BLT-03 meets industry standards.
7.What is the process for return or replacement of AOZ8662BLT-03?
All AOZ8662BLT-03 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8662BLT-03, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AOZ8662BLT-03 part is unused and in its original packaging.
Return procedure for AOZ8662BLT-03:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8662BLT-03 Tags
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