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Alpha & Omega Semiconductor Inc. AOZ8350ADI-04
- Part No.:
- AOZ8350ADI-04
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0805 (2012 Metric)
- Datasheet:
-
AOZ8350ADI-04.pdf
- Description:
- TVS DIODE 4.8VWM 14VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,290
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Product details
Overview
AOZ8350ADI-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), 220 A IEC 61000-4-5 surge rating, 4.8 V reverse working voltage, 2100 pF line-to-ground capacitance, and clamps to 12.8–14 V at 220 A peak pulse current-enabling robust transient suppression in mobile and notebook power rails.
For engineers reviewing the AOZ8350ADI-04 datasheet, pinout, applications, or equivalent options, key selection criteria include its DFN2.0×1.25-2L package footprint, low clamping voltage under high-current surge, unidirectional polarity, RoHS/Halogen-Free compliance, and junction temperature range of –40°C to +125°C.
Technical Context
The AOZ8350ADI-04 operates as a unidirectional avalanche diode with fixed reverse polarity, triggered when transient voltage exceeds its 6–8.5 V breakdown threshold. Its dynamic resistance of 0.025 Ω ensures minimal voltage overshoot during fast 8/20 µs surges up to 220 A.
It exhibits stable 2100 pF capacitance at 0 V bias (1 MHz), with capacitance decreasing gradually above 0 V-making it suitable for DC power-line protection where signal integrity is not a concern but low clamping and high surge handling are critical.
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 rises significantly |
| Breakdown Voltage (VBR) | 6–8.5 V at 1 mA - defines turn-on threshold for transient clamping |
| Clamping Voltage (VCL) | 12.8–14 V at 220 A (8/20 µs) - limits peak voltage seen by protected circuit |
| Surge Current Rating | ±220 A per IEC 61000-4-5 - withstands lightning-induced transients on power lines |
| ESD Rating | ±30 kV contact/air per IEC 61000-4-2 - meets highest industrial ESD immunity class |
| Junction Capacitance (CJ) | 2100 pF at 0 V, 1 MHz - optimized for power-line (not high-speed data-line) applications |
Pinout & Package
AOZ8350ADI-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 pad on bottom. Pin 1 is marked with laser etch; the device has two terminals only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Input / Power Line Connection | Connected to protected rail (e.g., battery+, VBUS); conducts surge current toward cathode |
| Pin 2 (Cathode) | Ground Reference / Clamp Node | Connected to system ground; provides low-impedance path for transient energy dissipation |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD Protection | ±30 kV contact/air - eliminates need for external ESD staging in portable power inputs |
| IEC 61000-4-5 Surge Handling | 220 A (8/20 µs) - protects against induced lightning surges on USB-C, battery, or adapter inputs |
| Low Clamping Voltage | 12.8 V at 220 A - keeps downstream ICs within absolute maximum ratings during worst-case surge |
| Thermal Robustness | –40°C to +125°C TJ operation - supports automotive-grade ambient conditions without derating |
| Package Efficiency | DFN2.0×1.25-2L footprint - enables compact placement near connectors or battery terminals |
Applications
| Battery Protection | USB-C VBUS Protection |
|---|---|
Use Scenario: Protecting lithium-ion battery input from ESD events during hot-plug or handling. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery+ and system ground. Use Value: Prevents overvoltage damage to battery management ICs during ±30 kV ESD discharge, with clamping below 14 V at full 220 A surge. |
Use Scenario: Safeguarding USB-C receptacle VBUS line against surges from faulty adapters or cable insertion. IC Role / Device Role / Timing Role: Primary surge suppressor on VBUS rail upstream of load switch or PD controller. Use Value: Absorbs 220 A IEC 61000-4-5 transients while maintaining <14 V clamping, preserving USB-C power delivery compliance. |
| Notebook DC Input Protection | Mobile Device Charger Port |
Use Scenario: Securing 19 V DC input jack against lightning-induced surges entering via AC adapter. IC Role / Device Role / Timing Role: First-line unidirectional TVS on main DC input before buck converter or battery charger IC. Use Value: Withstands repeated 220 A surges without degradation, verified per AOS reliability report (HTRB, HAST, Temp Cycle). |
Use Scenario: Hardening micro-USB or USB-C charging port against ESD during daily user interaction. IC Role / Device Role / Timing Role: Surface-mount TVS directly at connector, anode to VBUS, cathode to chassis ground. Use Value: Delivers ±30 kV ESD immunity without adding series impedance-critical for fast-charging circuits sensitive to voltage drop. |
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; higher VRWM (4.5 V), lower surge rating (400 W, ~100 A 8/20 µs) | Larger footprint; less suitable for space-constrained mobile PCBs | Choose SMAJ4.5A only if board area allows larger SMC/SMA package and surge requirement is ≤100 A |
| TPD4E004DRYR | Quad-channel, bidirectional, 4.5 V VRWM, 12 pF per channel - optimized for high-speed data lines | Designed for USB 2.0/3.0 data lanes, not power rails | Select TPD4E004DRYR only for differential signal protection; AOZ8350ADI-04 remains preferred for VBUS/battery power-line clamping |
Compared with SMAJ4.5A and TPD4E004DRYR, the AOZ8350ADI-04 uniquely balances ultra-compact DFN2.0×1.25-2L packaging, 220 A surge capability, and 4.8 V VRWM-making it optimal for modern mobile power-input protection where board space and high-energy transient immunity are both critical.
Availability
AOZ8350ADI-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 consistent parametric performance across production lots.
Supply support for AOZ8350ADI-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 high-efficiency MOSFETs, TVS diodes, and power ICs for computing, consumer, and industrial markets.
The AOZ8350ADI-04 belongs to AOS's Green TVS product line, engineered specifically for compact, high-reliability DC power-rail protection in portable electronics-emphasizing low clamping, high surge tolerance, and environmental compliance.
FAQ
What is the polarity configuration of the AOZ8350ADI-04?
The AOZ8350ADI-04 is a unidirectional TVS diode, with Pin 1 as anode and Pin 2 as cathode. It conducts only when the anode voltage exceeds the cathode by ≥6 V (breakdown threshold), making it suitable for protecting positive DC rails like battery+ or VBUS against overvoltage transients while blocking reverse current flow. This polarity prevents unintended conduction during normal operation.
Does the AOZ8350ADI-04 meet automotive AEC-Q200 requirements?
No-the AOZ8350ADI-04 is not AEC-Q200 qualified. Its datasheet specifies operation from –40°C to +125°C junction temperature and passes AOS internal reliability tests (HTRB, HAST, Temp Cycle), but it lacks formal AEC-Q200 stress qualification. For automotive applications requiring AEC-Q200, consult AOS's qualified TVS portfolio or verify with application engineering before deployment.
Can AOZ8350ADI-04 be used on high-speed data lines such as USB 2.0 or HDMI?
No-the AOZ8350ADI-04 is not suitable for high-speed data lines due to its 2100 pF junction capacitance, which would severely attenuate signal integrity and violate USB 2.0 or HDMI eye diagram specifications. It is explicitly designed for DC power-rail protection (battery, VBUS, DC input), where capacitance is non-critical and clamping performance dominates.
What is the thermal pad connection requirement for AOZ8350ADI-04?
The AOZ8350ADI-04 DFN2.0×1.25-2L package features an exposed thermal pad on the bottom surface, which must be soldered to a copper pour tied to system ground for optimal thermal dissipation and ESD current shunting. The recommended land pattern (per Page 5 of datasheet) includes a centered 1.0 mm × 1.0 mm thermal pad with solder mask defined openings to ensure reliable reflow attachment and mechanical stability.
How does the clamping voltage of AOZ8350ADI-04 vary with surge current?
The AOZ8350ADI-04 clamping voltage increases predictably with peak pulse current: 7.5–8.5 V at 1 A, 10–11.5 V at 100 A, 11–12.5 V at 150 A, and 12.8–14 V at 220 A (8/20 µs waveform). This behavior reflects its low dynamic resistance (0.025 Ω), ensuring controlled voltage rise even under extreme surge conditions-critical for protecting downstream ICs with tight absolute maximum ratings.
AOZ8350ADI-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):
- 220A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 2100pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (2x1.25)
AOZ8350ADI-04 FAQ
1.How can I place an order for AOZ8350ADI-04 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8350ADI-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 AOZ8350ADI-04 reliable?
The price and inventory of AOZ8350ADI-04 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8350ADI-04 is usually 5 days.
3.What payment methods are accepted for AOZ8350ADI-04?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8350ADI-04 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8350ADI-04?
AOZ8350ADI-04 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8350ADI-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 AOZ8350ADI-04?
For technical support, including AOZ8350ADI-04 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8350ADI-04 requirements.
6.How does Aetrix verify that AOZ8350ADI-04 is sourced from the original manufacturer or authorized distributors?
All AOZ8350ADI-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 AOZ8350ADI-04 meets industry standards.
7.What is the process for return or replacement of AOZ8350ADI-04?
All AOZ8350ADI-04 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8350ADI-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 AOZ8350ADI-04 part is unused and in its original packaging.
Return procedure for AOZ8350ADI-04:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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