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Alpha & Omega Semiconductor Inc. AOZ8351ADI-04
- Part No.:
- AOZ8351ADI-04
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0805 (2012 Metric)
- Datasheet:
-
AOZ8351ADI-04.pdf
- Description:
- TVS DIODE 4.8VWM 14VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,706
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Product details
Overview
AOZ8351ADI-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, 220 A IEC 61000-4-5 surge rating, 4.8 V reverse working voltage, 2100 pF line-to-ground capacitance, and clamps to ≤14 V at 220 A, enabling robust protection in mobile device power inputs.
For engineers reviewing the AOZ8351ADI-04 datasheet, pinout, applications, or equivalent options, key selection criteria include unidirectional surge clamping performance, low clamping voltage under high IPP, junction capacitance impact on signal integrity, and DFN2.0×1.25A-2L package compatibility with space-constrained power rail layouts.
Technical Context
The AOZ8351ADI-04 implements a single unidirectional avalanche diode structure optimized for transient energy diversion from power rails to ground. Its design targets fast response to ESD events (sub-nanosecond) and sustained surge absorption per IEC 61000-4-5 with dynamic resistance of 0.025 Ω across 1–220 A pulse range.
It operates within -40°C to +125°C junction temperature and maintains stable electrical characteristics including 6–8.5 V reverse breakdown (IT = 1 mA), ≤0.5 µA reverse leakage at 4.8 V, and 0.85 V forward voltage at 15 mA - all specified at TA = 25°C with guaranteed characterization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | Unidirectional TVS diode for power-rail overvoltage suppression |
| Reverse Working Voltage (VRWM) | 4.8 V - maximum continuous DC voltage applied without conduction |
| Clamping Voltage (VCL) | 12.8–14 V at 220 A 8/20 µs surge - limits peak rail voltage during lightning transients |
| Junction Capacitance (CJ) | 2100 pF at 0 V, 1 MHz - impacts high-frequency noise filtering but may load fast power sequencing |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact & air discharge - exceeds Level 4 immunity for handheld electronics |
| Surge Rating (IEC 61000-4-5) | ±220 A, 8/20 µs - supports USB-C VBUS, battery charger, and portable power input protection |
| Package | DFN2.0×1.25A-2L (2.0 mm × 1.25 mm × 0.5 mm) - surface-mount, RoHS/halogen-free, MSL 1 |
Pinout & Package
AOZ8351ADI-04 is housed in a 2-pin DFN2.0×1.25A-2L package with exposed pad (EP2_S). The package supports reflow soldering per J-STD-020 MSL 1 and provides thermal path via bottom-side copper connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Power rail input (e.g., VBUS or battery+) | Connected to protected line; conducts transient current toward cathode during overvoltage |
| Pin 2 (Cathode) | Ground reference | Low-impedance return path to system GND; must be routed with minimal inductance for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | ±30 kV contact/air - eliminates need for secondary ESD stages in consumer power inputs |
| Low dynamic resistance | 0.025 Ω across 1–220 A - ensures consistent clamping voltage rise under varying surge magnitude |
| Controlled junction capacitance | 2100 pF - balances surge energy handling with minimal impact on power-rail rise/fall times |
| High-temperature operation | -40°C to +125°C TJ - supports automotive cabin and industrial battery applications without derating |
Applications
| Battery Protection | USB-C Power Delivery Input |
|---|---|
Use Scenario: Protecting lithium-ion battery terminals against ESD during hot-plug insertion or board-level handling. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy from battery+ to GND before reaching protection IC or fuel gauge. Use Value: Prevents latch-up or gate oxide damage in battery management ICs by limiting voltage excursion to ≤14 V during 220 A surges. | Use Scenario: Safeguarding USB-C VBUS pins against surge coupling from connected chargers or cables. IC Role / Device Role / Timing Role: Primary overvoltage suppressor placed directly at connector, shunting surge current away from downstream PMICs. Use Value: Maintains 4.8 V VRWM margin above 5 V nominal VBUS while clamping to <14 V - preserving USB PD compliance. |
| Notebook DC Input | Portable Medical Device Power Rail |
Use Scenario: Securing 19 V DC input jacks against lightning-induced surges entering through AC adapters. IC Role / Device Role / Timing Role: First-line transient suppressor before buck converter input capacitor and controller. Use Value: 220 A surge rating handles worst-case IEC 61000-4-5 coupling; 2100 pF capacitance avoids resonance with typical 10–47 µF bulk capacitors. | Use Scenario: Shielding internal LiPo battery charging circuitry in handheld diagnostic tools exposed to clinical ESD environments. IC Role / Device Role / Timing Role: Standalone TVS on battery+ trace, operating within medical-grade ambient temperature range (-40°C to +125°C). Use Value: ±30 kV ESD rating meets IEC 61000-4-2 for handheld medical equipment; RoHS/halogen-free construction satisfies IEC 60601-1 material requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ4.5A | DO-214AC package (4.1 mm × 2.7 mm); 4.5 V VRWM; 13.4 V VCL @ 220 A; 1500 pF | Larger footprint; lower capacitance; higher clamping voltage | Preferred where board space allows larger package and lower capacitance is critical |
| SP1003-04UTG | SOD-323 package (1.7 mm × 1.25 mm); 4.5 V VRWM; 12.5 V VCL @ 220 A; 2200 pF | Smaller footprint but same pin count; slightly lower VRWM and comparable clamping | Used when minimizing PCB area is prioritized over thermal dissipation margin |
Compared with SMAJ4.5A and SP1003-04UTG, the AOZ8351ADI-04 offers optimal balance of compact DFN2.0×1.25A-2L size, 4.8 V VRWM headroom, and 2100 pF capacitance for modern power-rail ESD/surge co-protection - making it especially suitable for USB-C and slim-profile battery systems.
Availability
AOZ8351ADI-04 is available at Aetrix Electronics and suitable for battery protection, USB-C power delivery input, and notebook DC input applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AOZ8351ADI-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 AOZ8351ADI-04 belongs to AOS's high-surge TVS portfolio targeting compact, high-reliability power-rail protection in mobile and computing platforms - emphasizing low clamping, precise VRWM, and validated surge endurance.
FAQ
What is the maximum clamping voltage of AOZ8351ADI-04 under IEC 61000-4-5 220 A surge?
The AOZ8351ADI-04 clamps to a maximum of 14 V under 220 A, 8/20 µs IEC 61000-4-5 surge conditions. This value is measured at the device terminals with proper PCB layout - short traces, wide ground planes, and minimal loop inductance. The AOZ8351ADI-04 achieves this performance using a low-dynamic-resistance silicon structure that maintains voltage control across its full surge current range.
Does AOZ8351ADI-04 support bidirectional transient suppression?
No, AOZ8351ADI-04 is a unidirectional TVS diode and only protects against positive transients on the anode relative to cathode. It does not suppress negative transients on the protected line. For bidirectional protection, a separate device such as AOZ8352ADI-04 or dual-diode array would be required. The AOZ8351ADI-04 datasheet explicitly specifies unidirectional operation and lists only positive surge test data.
What is the junction capacitance of AOZ8351ADI-04 and how does it affect power rail design?
The AOZ8351ADI-04 has a typical junction capacitance of 2100 pF at 0 V and 1 MHz. This capacitance forms a low-pass filter with upstream source impedance and can influence power-rail rise time and stability in fast-switching circuits. In USB-C VBUS protection, it remains compatible with standard 10–47 µF bulk capacitors without causing resonant peaking. The AOZ8351ADI-04 datasheet includes CJ vs. voltage curves confirming stable behavior up to 5 V.
Is AOZ8351ADI-04 qualified for automotive under-hood temperature ranges?
Yes, AOZ8351ADI-04 is rated for junction temperatures from -40°C to +125°C and has passed AOS reliability qualification including HTRB at 150°C and temperature cycling from -65°C to +150°C. While not AEC-Q200 certified, its tested performance envelope covers extended industrial and automotive cabin applications. The AOZ8351ADI-04 reliability report confirms zero failures across 1000-hour HTRB and 500-cycle temperature cycling stress tests.
What package variant is AOZ8351ADI-04 supplied in and what are its assembly requirements?
AOZ8351ADI-04 is supplied in the DFN2.0×1.25A-2L package (2.0 mm × 1.25 mm × 0.5 mm) with exposed thermal pad (EP2_S). It is MSL 1 per J-STD-020 and requires standard lead-free reflow profiles. Solder paste volume and stencil aperture must accommodate the exposed pad for optimal thermal transfer and mechanical reliability. The AOZ8351ADI-04 package drawing and tape-and-reel dimensions are fully documented in the Rev. 1.0 datasheet.
AOZ8351ADI-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)
AOZ8351ADI-04 FAQ
1.How can I place an order for AOZ8351ADI-04 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8351ADI-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 AOZ8351ADI-04 reliable?
The price and inventory of AOZ8351ADI-04 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8351ADI-04 is usually 5 days.
3.What payment methods are accepted for AOZ8351ADI-04?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8351ADI-04 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8351ADI-04?
AOZ8351ADI-04 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8351ADI-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 AOZ8351ADI-04?
For technical support, including AOZ8351ADI-04 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8351ADI-04 requirements.
6.How does Aetrix verify that AOZ8351ADI-04 is sourced from the original manufacturer or authorized distributors?
All AOZ8351ADI-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 AOZ8351ADI-04 meets industry standards.
7.What is the process for return or replacement of AOZ8351ADI-04?
All AOZ8351ADI-04 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8351ADI-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 AOZ8351ADI-04 part is unused and in its original packaging.
Return procedure for AOZ8351ADI-04:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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