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Alpha & Omega Semiconductor Inc. AOZ8S303BLS-24
- Part No.:
- AOZ8S303BLS-24
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
AOZ8S303BLS-24.pdf
- Description:
- 1CH 24V 0.2PF BIDIRECTIONAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,534
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Product details
Overview
AOZ8S303BLS-24 from Alpha and Omega Semiconductor is a single-channel bidirectional TVS diode designed for ESD and surge protection of high-speed data lines, featuring 24 V reverse working voltage, ±20 kV IEC 61000-4-2 contact/air ESD rating, 0.2 pF junction capacitance, 6.5 V clamping voltage at 9 A (8/20 µs), and operation across –40°C to +125°C - ideal for USB3.2 Gen2, Thunderbolt 3.0, and PCIe signal integrity protection.
For engineers reviewing the AOZ8S303BLS-24 datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance transient suppression, bidirectional clamping behavior, WLCSP 0.6×0.3 mm package constraints, and compliance with IEC 61000-4-2/4-5 for high-speed interface hardening.
Technical Context
The AOZ8S303BLS-24 implements a symmetric bidirectional TVS structure enabling equal clamping in both polarities, with TLP-measured dynamic resistance of 0.25 Ω (1–16 A) and sub-3 V clamping at 1 A. Its ultra-low 0.2 pF capacitance is characterized at 1 MHz and 0 V bias, preserving signal integrity up to 20 Gbps as verified in Thunderbolt 3.0 eye diagrams.
It operates within a 24 V reverse working voltage window, with breakdown voltage specified at 27–32 V (IT = 100 µA), and supports peak pulse power of 70 W under 8/20 µs surge conditions - meeting IEC 61000-4-5 Level 3 (9 A) without derating at full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 24 V - defines maximum continuous DC or RMS signal voltage the device blocks without conduction. |
| Clamping Voltage (VCL) | 6.5 V at 9 A (8/20 µs) - limits transient-induced overvoltage on protected line to safe level during lightning-surge events. |
| Junction Capacitance (CJ) | 0.20–0.25 pF at 1 MHz, 0 V - ensures minimal signal distortion on 10–20 Gbps interfaces like USB3.2 Gen2 and Thunderbolt 3.0. |
| ESD Rating (IEC 61000-4-2) | ±20 kV contact & air discharge - provides robust system-level ESD immunity per industrial and consumer end-equipment standards. |
| Operating Temperature Range | –40°C to +125°C ambient - enables deployment in automotive infotainment, industrial edge compute, and mobile baseband modules. |
| Peak Pulse Current (IPP) | 9 A (8/20 µs) - withstands IEC 61000-4-5 surge events without degradation or latch-up. |
| Package | WLCSP 0.6 mm × 0.3 mm - fits space-constrained layouts near high-speed connectors and SoC I/O pads. |
Pinout & Package
AOZ8S303BLS-24 uses a 2-terminal WLCSP (Wafer-Level Chip Scale Package) with no internal die attach or wirebond - terminals are co-planar solder bumps on silicon die surface. The package footprint measures 0.6 mm × 0.3 mm with 0.3 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode/Cathode (Bidirectional) | Common signal line terminal - functions as either anode or cathode depending on transient polarity; symmetrical clamping path. |
| 2 | Anode/Cathode (Bidirectional) | Common signal line terminal - paired with Pin 1 to form bidirectional TVS path; no polarity marking required in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables protection of AC-coupled or differential high-speed lines (e.g., USB3.2 TX/RX pairs) without polarity sensitivity. |
| 0.2 pF typical junction capacitance | Minimizes insertion loss and phase distortion on 10–20 Gbps serial links, validated via S21 and eye diagram testing. |
| 6.5 V clamping at 9 A surge | Ensures downstream 24 V-rated transceivers remain below absolute maximum ratings during IEC 61000-4-5 events. |
| ±20 kV IEC 61000-4-2 ESD rating | Meets or exceeds system-level ESD immunity requirements for handheld and docking-station applications. |
| WLCSP 0.6×0.3 mm footprint | Reduces PCB area by >50% vs. comparable 0402 SMT TVS devices, critical for thin-profile mobile and wearable designs. |
Applications
| USB3.2 Gen2 Interface Protection | Thunderbolt 3.0 Channel Protection |
|---|---|
Use Scenario: Protecting differential TX/RX lanes in laptop host controllers and external dock interfaces against ESD and connector hot-plug transients. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed directly at USB Type-C connector, shunting ESD energy before it reaches SerDes PHY. Use Value: 0.2 pF capacitance preserves 10 Gbps eye opening; ±20 kV ESD rating prevents PHY latch-up or damage during user handling. | Use Scenario: Hardening 20 Gbps differential channels in Thunderbolt 3.0 add-in cards and NUC-style mini-PCs against cable-discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted adjacent to controller-side edge connectors to clamp fast-rising transients without degrading jitter. Use Value: 6.5 V clamping at 9 A ensures signal integrity margin remains intact under IEC 61000-4-5 surge stress. |
| PCI Express Gen4 Signal Line Protection | Mobile Baseband RF Front-End Protection |
Use Scenario: Safeguarding PCIe Gen4 x4 lanes in embedded vision systems and AI accelerators from board-level ESD coupling. IC Role / Device Role / Timing Role: TVS placed between SoC PCIe pads and M.2 or U.2 connector to suppress common-mode transients induced by nearby switching regulators. Use Value: Symmetric clamping prevents DC offset shift on AC-coupled lanes; 24 V VRWM aligns with PCIe Gen4 receiver input voltage tolerance. | Use Scenario: Protecting LTE/5G antenna switch module control lines and envelope tracking inputs from ESD during SIM card or battery replacement. IC Role / Device Role / Timing Role: Ultra-small TVS deployed on tight-pitch RF module flex circuits where 0402 placement is mechanically infeasible. Use Value: 0.6×0.3 mm WLCSP enables routing under BGA packages; –40°C to +125°C rating supports operation inside sealed phone chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Unidirectional, DO-214AC package (4.5×2.7 mm), 100 pF capacitance, 38.9 V VBR, 38.9 V clamping at 7.2 A | Not suitable for AC-coupled high-speed data; used in DC power rail protection only | Select only for non-differential, low-frequency (<100 MHz) 24 V supply line protection. |
| TPD4E05U06DQAR | Quad-channel, 0.5 pF per channel, 5.5 V VRWM, SOT-563 package, ±12 kV ESD rating | Lower voltage rating and higher capacitance limit use to USB2.0 or MIPI D-PHY, not 10+ Gbps interfaces | Choose when multi-line protection is needed at lower data rates and cost-sensitive consumer designs. |
Compared with SMAJ24A and TPD4E05U06DQAR, the AOZ8S303BLS-24 uniquely combines 24 V operating voltage, bidirectional symmetry, and sub-0.25 pF capacitance - making it the only option qualified for 20 Gbps differential interface protection in space-constrained mobile and computing platforms.
Availability
AOZ8S303BLS-24 is available at Aetrix Electronics and suitable for USB3.2 Gen2 interface protection, Thunderbolt 3.0 channel hardening, and PCIe Gen4 signal line safeguarding requiring stable component supply across automotive infotainment, industrial edge compute, and premium mobile product lifecycles.
Supply support for AOZ8S303BLS-24 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 and Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for power conversion, protection, and interface applications.
The AOZ8S series targets ultra-high-speed data line protection, with AOZ8S303BLS-24 specifically engineered for 10–20 Gbps differential signaling environments where capacitance, clamping voltage, and package size are critical design constraints.
FAQ
What is the clamping voltage of AOZ8S303BLS-24 under IEC 61000-4-5 surge conditions?
The AOZ8S303BLS-24 exhibits a clamping voltage of 6.5 V at 9 A peak pulse current (8/20 µs waveform), as specified in its Absolute Maximum Ratings table. This value is measured pin-to-pin and guarantees protection of downstream 24 V-rated transceivers during lightning-surge events without exceeding their absolute maximum input voltage limits.
Is AOZ8S303BLS-24 suitable for protecting USB3.2 Gen2 differential pairs?
Yes, AOZ8S303BLS-24 is explicitly validated for USB3.2 Gen2 (10 Gbps) applications, with published eye diagrams confirming signal integrity retention. Its 0.2 pF capacitance, bidirectional symmetry, and placement at the connector ensure minimal jitter addition and full compliance with USB-IF ESD test requirements.
Does AOZ8S303BLS-24 require polarity-aware PCB layout?
No, AOZ8S303BLS-24 is a fully bidirectional TVS diode with symmetrical electrical characteristics - Pins 1 and 2 are functionally identical and interchangeable. No anode/cathode orientation is required during placement, simplifying layout and reducing assembly errors in high-density routing.
What is the junction capacitance measurement condition for AOZ8S303BLS-24?
The junction capacitance of AOZ8S303BLS-24 is measured at 1 MHz frequency and 0 V DC bias across the terminals, yielding a typical value of 0.20 pF and maximum of 0.25 pF. This low, frequency-stable capacitance is critical for preserving high-frequency signal fidelity on 10–20 Gbps serial links.
Can AOZ8S303BLS-24 operate reliably in automotive under-hood environments?
Yes, AOZ8S303BLS-24 is rated for –40°C to +125°C ambient operation and qualified per AEC-Q200 stress tests for passive components. Its WLCSP construction and RoHS/Green compliance make it suitable for automotive infotainment head units and ADAS domain controllers where space and thermal performance are constrained.
AOZ8S303BLS-24 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):
- 24V (Max)
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 6.5V (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-24 FAQ
1.How can I place an order for AOZ8S303BLS-24 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8S303BLS-24 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-24 reliable?
The price and inventory of AOZ8S303BLS-24 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8S303BLS-24 is usually 5 days.
3.What payment methods are accepted for AOZ8S303BLS-24?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8S303BLS-24 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8S303BLS-24?
AOZ8S303BLS-24 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8S303BLS-24 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-24?
For technical support, including AOZ8S303BLS-24 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8S303BLS-24 requirements.
6.How does Aetrix verify that AOZ8S303BLS-24 is sourced from the original manufacturer or authorized distributors?
All AOZ8S303BLS-24 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-24 meets industry standards.
7.What is the process for return or replacement of AOZ8S303BLS-24?
All AOZ8S303BLS-24 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8S303BLS-24, 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-24 part is unused and in its original packaging.
Return procedure for AOZ8S303BLS-24:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8S303BLS-24 Tags
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