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Alpha & Omega Semiconductor Inc. AOZ8350DI-04
- Part No.:
- AOZ8350DI-04
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0805 (2012 Metric)
- Datasheet:
-
AOZ8350DI-04.pdf
- Description:
- TVS DIODE 4.8VWM 14VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,006
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Product details
Overview
AOZ8350DI-04 from Alpha & Omega Semiconductor is a 1-channel unidirectional high-surge TVS diode designed for power-rail protection on battery and Vbus lines. It delivers ±30 kV IEC 61000-4-2 ESD immunity (contact/air), 160 A IEC 61000-4-5 surge rating, 4.8 V reverse working voltage, 1200 pF line-to-ground capacitance, and clamps to 14–15.5 V at 160 A peak pulse current - enabling robust transient suppression in space-constrained mobile power rails.
For engineers reviewing the AOZ8350DI-04 datasheet, pinout, applications, or equivalent options, key selection criteria include unidirectional clamping behavior, low dynamic resistance (0.04 Ω), junction temperature range (−40°C to +125°C), DFN2.0×1.25-2L package compatibility, and compliance with IEC 61000-4-2/4-5 for battery-level surge hardening.
Technical Context
The AOZ8350DI-04 operates as a single unidirectional avalanche diode with fixed polarity: anode connected to protected line, cathode to ground. Its clamping action begins at 6–8.5 V breakdown (VBR), sustains low dynamic resistance (0.04 Ω) across 1–160 A surge currents, and maintains ≤0.5 µA leakage at 4.8 V reverse bias.
It is optimized for DC power rail protection-not signal-line ESD-evidenced by its 1200 pF capacitance, which precludes high-speed data use but ensures effective energy diversion during lightning-like transients. Thermal design must account for its −40°C to +125°C junction rating and exposed paddle thermal path in the DFN2.0×1.25-2L package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | Unidirectional TVS diode for DC power rail protection |
| Reverse Working Voltage (VRWM) | 4.8 V - maximum continuous DC voltage before leakage exceeds 0.5 µA |
| Clamping Voltage (VCL) | 14–15.5 V at 160 A 8/20 µs surge - defines worst-case overvoltage seen by downstream circuitry |
| Junction Capacitance (CJ) | 1200 pF at 0 V - impacts power-rail stability but unsuitable for >10 MHz signal paths |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact/air - meets highest industrial ESD immunity class without external RC filtering |
| Surge Rating (IEC 61000-4-5) | 160 A 8/20 µs - withstands severe lightning-induced surges on battery/Vbus inputs |
| Operating Temperature | −40°C to +125°C junction - supports automotive cabin and industrial ambient deployment |
Pinout & Package
AOZ8350DI-04 is housed in a RoHS-compliant, halogen-free DFN2.0×1.25-2L package (2.0 mm × 1.25 mm × 0.5 mm) with exposed thermal paddle on bottom. Pin 1 (anode) and Pin 2 (cathode) are located on opposite ends of the long side; orientation is marked by laser etch "AW" and date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Protected power line input | Connected directly to battery or Vbus rail; conducts surge current toward cathode during overvoltage |
| Pin 2 (Cathode) | Ground return path | Low-inductance connection to system ground plane; carries full surge current during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | ±30 kV contact/air - eliminates need for secondary ESD stages in battery-input protection |
| Dynamic resistance (RDYN) | 0.04 Ω - minimizes voltage overshoot during fast-rising surges by limiting IR drop |
| Thermal performance | Exposed paddle enables <100°C/W junction-to-board thermal resistance with 25 mm² copper pour |
| Leakage control | ≤0.5 µA at 4.8 V - prevents measurable quiescent drain on battery-powered systems |
| Process reliability | 15.26 FIT failure rate (MTTF = 7480 years) - validated per JEDEC JESD85 for long-life embedded use |
Applications
| Battery Protection | Vbus Line Protection |
|---|---|
Use Scenario: Protecting lithium-ion battery terminals from ESD events during hot-plug insertion or handling. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery+ and system ground. Use Value: Prevents gate oxide damage to battery management ICs by clamping transients to ≤15.5 V at 160 A while adding only 1200 pF loading. |
Use Scenario: Safeguarding USB-C Vbus input against surge coupling from attached peripherals or cable discharge. IC Role / Device Role / Timing Role: Primary surge suppressor on 5 V Vbus rail upstream of buck converter or load switch. Use Value: Absorbs 160 A IEC 61000-4-5 surges without latch-up, maintaining 4.8 V operating margin below typical 5.5 V input tolerance. |
| Notebook Power Input | Industrial Portable Equipment |
Use Scenario: Hardening DC input jack (e.g., 19 V adapter) against lightning-induced surges in consumer notebooks. IC Role / Device Role / Timing Role: First-line transient suppressor before input EMI filter and primary DC-DC stage. Use Value: Clamps 8/20 µs surges to 14–15.5 V with sub-10 ns response, preserving downstream regulator SOA under worst-case grid coupling. |
Use Scenario: Securing main battery rail in handheld test equipment exposed to field ESD and accidental short-circuit transients. IC Role / Device Role / Timing Role: Standalone TVS on 7.4–12 V nominal battery bus, rated for −40°C to +125°C operation. Use Value: Delivers guaranteed ±30 kV ESD immunity and 160 A surge capability in a 2.5 mm² footprint, enabling compact ruggedized designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ4.5A | DO-214AC package (4.5 mm × 2.7 mm); higher 12.5 V clamping at 100 A; 100 pF capacitance | Lower capacitance suits mixed-signal boards; larger footprint limits ultra-thin mobile use | Select when board space allows larger package and lower capacitance is critical for analog sections near power rail |
| TPD4E001DPYR | 4-channel bidirectional array in DFN1.0×0.6-6L; 5.5 V VRWM; 12 pF per channel | Designed for high-speed data lines (USB, HDMI), not power rails; insufficient surge rating (4 A) | Not suitable for AOZ8350DI-04's power-rail role; only consider if protecting low-voltage signal lines alongside power |
Compared with SMAJ4.5A and TPD4E001DPYR, the AOZ8350DI-04 uniquely balances ultra-compact size, high 160 A surge capacity, and power-rail-optimized unidirectional clamping - making it irreplaceable where space-constrained battery/Vbus protection demands both ESD and lightning-grade robustness.
Availability
AOZ8350DI-04 is available at Aetrix Electronics and suitable for battery protection, USB-C Vbus hardening, and notebook DC input applications requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.
Supply support for AOZ8350DI-04 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 efficiency-critical applications.
The AOZ8350DI-04 belongs to AOS's high-surge TVS family engineered specifically for DC power rail protection in portable and computing devices - emphasizing low clamping voltage, high surge current, and miniature DFN packaging.
FAQ
What is the maximum continuous reverse voltage the AOZ8350DI-04 can withstand?
The AOZ8350DI-04 has a reverse working voltage (VRWM) of 4.8 V, meaning it blocks up to 4.8 V DC continuously with leakage current ≤0.5 µA. Exceeding this voltage risks premature conduction and thermal runaway. This rating makes AOZ8350DI-04 suitable for 5 V nominal rails where margin to 5.5 V tolerance is required, but not for 12 V or higher systems without series impedance.
Does the AOZ8350DI-04 meet IEC 61000-4-5 Level 4 surge immunity?
Yes, the AOZ8350DI-04 is rated for ±160 A under IEC 61000-4-5 (8/20 µs waveform), exceeding Level 4 (40 A) by a factor of four. Its clamping voltage remains ≤15.5 V at 160 A, ensuring downstream components see minimal overvoltage. This performance is validated per AOS reliability report rev A and confirmed in the December 2018 datasheet.
Can AOZ8350DI-04 be used on high-speed data lines like USB 3.0 or HDMI?
No, AOZ8350DI-04 is not suitable for high-speed data lines due to its 1200 pF junction capacitance, which would severely attenuate signals above ~10 MHz. It is explicitly designed for DC power rail protection (battery, Vbus). For USB/HDMI, AOS offers low-capacitance arrays like TPD4E001DPYR (12 pF), but those lack the 160 A surge rating of AOZ8350DI-04.
What is the thermal pad requirement for AOZ8350DI-04 in PCB layout?
The AOZ8350DI-04 DFN2.0×1.25-2L package features an exposed thermal paddle on the bottom. A minimum 25 mm² copper pour connected via ≥4 thermal vias (0.3 mm diameter) to inner ground planes is recommended to maintain junction temperature within −40°C to +125°C under 160 A surge conditions. The land pattern must match AOS-recommended dimensions on page 5 of the datasheet.
Is AOZ8350DI-04 compliant with automotive AEC-Q200 requirements?
No, AOZ8350DI-04 is not AEC-Q200 qualified. While it operates from −40°C to +125°C and passes JEDEC reliability tests (HTRB, HAST, Temp Cycle), it lacks the full stress qualification sequence required for automotive grade. It is rated for industrial and consumer applications; for automotive battery protection, AOS offers AEC-Q200 variants such as AOZ8206DI-04.
AOZ8350DI-04 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 0805 (2012 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 4.8V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 14V
- Current - Peak Pulse (10/1000µs):
- 160A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1200pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (2x1.25)
AOZ8350DI-04 FAQ
1.How can I place an order for AOZ8350DI-04 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8350DI-04 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 AOZ8350DI-04 reliable?
The price and inventory of AOZ8350DI-04 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8350DI-04 is usually 5 days.
3.What payment methods are accepted for AOZ8350DI-04?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8350DI-04 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8350DI-04?
AOZ8350DI-04 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8350DI-04 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 AOZ8350DI-04?
For technical support, including AOZ8350DI-04 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8350DI-04 requirements.
6.How does Aetrix verify that AOZ8350DI-04 is sourced from the original manufacturer or authorized distributors?
All AOZ8350DI-04 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 AOZ8350DI-04 meets industry standards.
7.What is the process for return or replacement of AOZ8350DI-04?
All AOZ8350DI-04 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8350DI-04, 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 AOZ8350DI-04 part is unused and in its original packaging.
Return procedure for AOZ8350DI-04:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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