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Alpha & Omega Semiconductor Inc. AOZ8S303BLS-11
- Part No.:
- AOZ8S303BLS-11
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
AOZ8S303BLS-11.pdf
- Description:
- 1CH 11V 0.2PF BIDIRECTIONAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,356
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Product details
Overview
AOZ8S303BLS-11 from Alpha & Omega Semiconductor is a single-channel bidirectional TVS diode designed to protect high-speed data lines-including USB3.2 Gen2 (10 Gbps), Thunderbolt 3.0 (16 Gbps), and PCIe-against ESD (±22 kV contact/air), lightning surge (9 A, 8/20 µs), and EFT (80 A). It features 0.2 pF junction capacitance, 11 V reverse working voltage, and 6 V clamping at 9 A.
For engineers reviewing the AOZ8S303BLS-11 datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low capacitance for signal integrity, bidirectional clamping for AC-coupled interfaces, RoHS-compliant WLCSP-2 package footprint (0.6 mm × 0.3 mm), and validated eye diagram performance up to 16 Gbps.
Technical Context
The AOZ8S303BLS-11 implements a symmetric silicon avalanche structure enabling true bidirectional transient suppression between any two pins. Its TLP-tested dynamic resistance of 0.25 Ω ensures rapid voltage clamping under fast-rising transients (100 ns TLP pulse), while sub-0.25 pF capacitance minimizes insertion loss below –2.5 dB up to 10 GHz.
Rated for –40°C to +125°C operation and qualified per IEC 61000-4-2 (±22 kV), IEC 61000-4-5 (9 A), and IEC 61000-4-4 (80 A), the device targets space-constrained, high-reliability interfaces where leakage (<50 nA at 11 V) and low clamping (6 V @ 9 A) directly preserve signal fidelity and IC survivability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage | 11 V - Maximum continuous DC or RMS signal voltage before conduction begins; matches common 12 V rail margins and USB/PCIe common-mode ranges. |
| Clamping Voltage (9 A, 8/20 µs) | 6 V - Peak voltage seen by protected IC during worst-case lightning surge; stays below typical 6.5 V I/O absolute maximum ratings. |
| Junction Capacitance | 0.20–0.25 pF @ 0 V, 1 MHz - Enables < –2.5 dB insertion loss at 10 GHz; preserves eye opening in 10–16 Gbps serial links. |
| ESD Rating (IEC 61000-4-2) | ±22 kV contact/air - Exceeds Level 4 immunity requirement; protects against direct human discharge without system reset or latch-up. |
| Peak Pulse Power | 70 W @ 8/20 µs - Sustains multi-event surge stress in portable electronics with minimal thermal derating at +125°C ambient. |
| Package | WLCSP 0.6 mm × 0.3 mm, 2-terminal - 0201-equivalent footprint; reduces PCB area by >50% vs. SOD-323, enabling placement adjacent to connector pins. |
Pinout & Package
AOZ8S303BLS-11 uses a 2-terminal WLCSP (Wafer-Level Chip-Scale Package) with no internal die attach pad or exposed thermal slug. The package has no polarity marking; both terminals are electrically symmetric and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as signal line input/output; no fixed anode/cathode assignment due to symmetric TVS structure. |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired with Terminal 1 to form differential or single-ended clamp path; identical electrical behavior to Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled high-speed differential pairs (e.g., USB3.2 TX/RX) without polarity constraints or series DC blocking capacitors. |
| 0.2 pF capacitance | Maintains signal integrity in 10–16 Gbps links: measured insertion loss ≤ –2.5 dB at 10 GHz; validated via HDMI2.1 and Thunderbolt 3.0 eye diagrams. |
| 6 V clamping at 9 A | Keeps protected IC I/O pins below 6.5 V absolute max during IEC 61000-4-5 surges-preventing gate oxide damage and logic upset in 1.8 V/3.3 V transceivers. |
| ±22 kV ESD immunity | Meets and exceeds IEC 61000-4-2 Level 4 for both contact and air discharge, eliminating need for secondary board-level ESD filters in mobile end-equipment. |
Applications
| USB3.2 Gen2 Interface Protection | Thunderbolt 3.0 Channel Protection |
|---|---|
Use Scenario: Protecting SuperSpeed TX/RX differential pairs in ultrabooks and docking stations from ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at USB Type-C connector, clamping transients before they reach the USB controller PHY. Use Value: 0.2 pF capacitance prevents eye diagram degradation at 10 Gbps; ±22 kV ESD rating eliminates field failures from user handling. | Use Scenario: Safeguarding Thunderbolt 3.0 lanes in external GPUs and high-performance peripherals against cable-induced surges and connector ESD. IC Role / Device Role / Timing Role: Two-channel protection using one AOZ8S303BLS-11 per differential pair (TX+/TX−, RX+/RX−), mounted within 2 mm of connector pads. Use Value: 6 V clamping at 9 A ensures Thunderbolt PHY I/O remains within safe operating area during 8/20 µs lightning surges per IEC 61000-4-5. |
| PCI Express Gen4 Signal Line Protection | Mobile Phone High-Speed MIPI D-PHY Protection |
Use Scenario: Shielding PCIe Gen4 x4 lanes in compact edge AI accelerators from board-level EFT and system-level ESD coupling. IC Role / Device Role / Timing Role: Single AOZ8S303BLS-11 per lane (TX+–TX− or RX+–RX−), leveraging bidirectional symmetry to avoid polarity routing errors. Use Value: Sub-0.25 pF capacitance maintains PCIe Gen4 jitter budget (<1.0 ps RMS); 70 W peak power rating supports multi-pulse surge endurance. | Use Scenario: Protecting MIPI D-PHY clock and data lanes in smartphone camera modules from assembly-line ESD and flex-cable coupling. IC Role / Device Role / Timing Role: TVS placed at FPC connector entry point on image sensor PCB, minimizing trace length to preserve 2.5 Gbps signal rise time. Use Value: 0.6 mm × 0.3 mm WLCSP footprint fits within 0.5 mm² camera module keep-out zones; ±22 kV contact ESD rating prevents yield loss during manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Unidirectional, DO-214AC package (4.5 mm × 2.7 mm), 11 V VRWM, 19.9 V VBR, 120 pF CJ | Requires polarity-aware layout; unsuitable for AC-coupled differential lines; too large for mobile PCBs | Select only for cost-sensitive industrial DC-bus protection where size and capacitance are non-critical. |
| TPD4E05U06DQAR | Quad-channel, 0.65 mm × 1.0 mm DQA package, 5.5 V VRWM, 0.5 pF CJ, ±12 kV ESD | Lower working voltage limits use to 3.3 V systems; higher capacitance degrades >8 Gbps signals; quad configuration adds routing complexity | Prefer for multi-line protection in mid-speed interfaces (e.g., USB2.0, HDMI 1.4) where channel count justifies shared footprint. |
Compared with SMAJ11A and TPD4E05U06DQAR, the AOZ8S303BLS-11 uniquely combines bidirectional operation, 0.2 pF capacitance, and 0201-scale WLCSP packaging-making it the only viable option for space-constrained, >10 Gbps differential data line protection requiring ±22 kV ESD immunity.
Availability
AOZ8S303BLS-11 is available at Aetrix Electronics and suitable for USB3.2, Thunderbolt 3.0, and PCIe Gen4 applications requiring stable component supply, high-volume production scalability, and long-term lifecycle assurance.
Supply support for AOZ8S303BLS-11 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 computing, consumer, and industrial markets.
The AOZ8S303BLS-11 belongs to AOS's ultra-low-capacitance TVS portfolio, engineered specifically for ESD and surge protection of next-generation high-speed serial interfaces without compromising signal integrity.
FAQ
What is the maximum clamping voltage of the AOZ8S303BLS-11 under IEC 61000-4-5 surge conditions?
The AOZ8S303BLS-11 clamps to 6 V when subjected to a 9 A, 8/20 µs lightning surge per IEC 61000-4-5. This value is measured across the device terminals and verified via standardized surge waveform testing. The 6 V clamping level ensures protected downstream ICs-such as USB3.2 or Thunderbolt PHYs rated for 6.5 V absolute maximum-remain within safe operating limits during surge events. The AOZ8S303BLS-11 achieves this with a dynamic resistance of 0.25 Ω, enabling rapid voltage stabilization.
Does the AOZ8S303BLS-11 require polarity-aware PCB layout?
No-the AOZ8S303BLS-11 is a symmetric bidirectional TVS diode with identical electrical characteristics between its two terminals. Neither pin is designated anode or cathode; the device clamps equally for positive or negative transients applied across Terminals 1 and 2. This eliminates orientation constraints during placement, simplifying layout for differential high-speed lines like USB3.2 TX/RX or PCIe lanes. The AOZ8S303BLS-11 datasheet confirms bidirectional operation in both Absolute Maximum Ratings and Electrical Characteristics tables.
What is the junction capacitance of the AOZ8S303BLS-11, and how does it impact 10 Gbps signal integrity?
The AOZ8S303BLS-11 exhibits 0.20–0.25 pF junction capacitance at 0 V bias and 1 MHz, verified by manufacturer characterization. At 10 Gbps (5 GHz fundamental frequency), this ultra-low value results in < –2.5 dB insertion loss, preserving eye height and jitter margin in USB3.2 Gen2 links. Measured eye diagrams confirm open eyes under full-rate traffic, confirming that the AOZ8S303BLS-11 introduces negligible signal distortion-unlike alternatives with >1 pF capacitance that cause measurable eye closure.
Is the AOZ8S303BLS-11 suitable for automotive infotainment display interfaces?
Yes-the AOZ8S303BLS-11 operates across –40°C to +125°C ambient temperature and is RoHS-compliant with halogen reduction per AOS Green Product standards. Its ±22 kV IEC 61000-4-2 ESD rating and 9 A IEC 61000-4-5 surge capability meet stringent requirements for LVDS or eDP display link protection in automotive cabins. However, it is not AEC-Q200 qualified; for ASIL-B/C systems, additional system-level validation per ISO 16750-2 is required. The AOZ8S303BLS-11 remains appropriate for non-safety-critical infotainment video paths.
How does the WLCSP 0.6 mm × 0.3 mm package of the AOZ8S303BLS-11 compare to standard SOD-323 in PCB space usage?
At 0.6 mm × 0.3 mm (0.18 mm²), the AOZ8S303BLS-11's WLCSP package occupies less than 25% of the PCB area required by a standard SOD-323 (2.7 mm × 1.7 mm = 4.59 mm²). This enables placement directly adjacent to high-speed connector pads-reducing unprotected trace length and improving ESD suppression efficacy. The AOZ8S303BLS-11's solder-ball interconnect also eliminates lead inductance present in SOD-323 leads, further enhancing high-frequency transient response.
AOZ8S303BLS-11 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 0201 (0603 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 11V (Max)
- Voltage - Breakdown (Min):
- 12V
- Voltage - Clamping (Max) @ Ipp:
- 6V (Typ)
- Current - Peak Pulse (10/1000µs):
- 9A (8/20µs)
- Power - Peak Pulse:
- 70W
- Power Line Protection:
- No
- Applications:
- HDMI, USB
- Capacitance @ Frequency:
- 0.2pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-WLCSP (0.6x0.3)
AOZ8S303BLS-11 FAQ
1.How can I place an order for AOZ8S303BLS-11 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8S303BLS-11 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 AOZ8S303BLS-11 reliable?
The price and inventory of AOZ8S303BLS-11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8S303BLS-11 is usually 5 days.
3.What payment methods are accepted for AOZ8S303BLS-11?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8S303BLS-11 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8S303BLS-11?
AOZ8S303BLS-11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8S303BLS-11 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 AOZ8S303BLS-11?
For technical support, including AOZ8S303BLS-11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8S303BLS-11 requirements.
6.How does Aetrix verify that AOZ8S303BLS-11 is sourced from the original manufacturer or authorized distributors?
All AOZ8S303BLS-11 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 AOZ8S303BLS-11 meets industry standards.
7.What is the process for return or replacement of AOZ8S303BLS-11?
All AOZ8S303BLS-11 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8S303BLS-11, 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 AOZ8S303BLS-11 part is unused and in its original packaging.
Return procedure for AOZ8S303BLS-11:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8S303BLS-11 Tags
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