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Alpha & Omega Semiconductor Inc. AOZ8320DI-12
- Part No.:
- AOZ8320DI-12
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0603 (1608 Metric)
- Datasheet:
-
AOZ8320DI-12.pdf
- Description:
- TVS DIODE 12VWM 30VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,463
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Product details
Overview
AOZ8320DI-12 from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for single-line surge and ESD protection on 12V power rails, featuring 12V reverse working voltage (VRWM), 45A peak pulse current (8/20µs), and 1500W peak pulse power - deployed in USB voltage buses and battery protection circuits.
For engineers reviewing the AOZ8320DI-12 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 45A (26–30V), ultra-low junction capacitance (275pF), and DFN1.6×0.8_2L package compatibility with high-density mobile and display power rail layouts.
Technical Context
The AOZ8320DI-12 implements a single unidirectional avalanche diode structure optimized for fast response to IEC 61000-4-2 ESD (±30kV air/contact) and IEC 61000-4-5 surge (8/20µs, up to 45A). Its low dynamic resistance (0.05–0.1Ω) ensures stable clamping under transient stress.
It operates across –40°C to +125°C ambient, supports 12V nominal rail protection with 13.2–17V breakdown voltage (VBR at 1mA), and delivers sub-100nA reverse leakage at VRWM - enabling low-quiescent-power system-level immunity without loading sensitive 12V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 12V reverse working voltage - defines maximum continuous DC voltage the device blocks without conduction. |
| VBR (min/typ/max) | 13.2V / 15V / 17V at 1mA - ensures reliable turn-on above nominal rail while avoiding false triggering. |
| IPP (8/20µs) | 45A peak pulse current - withstands IEC 61000-4-5 Level 3 surges on 12V systems. |
| VCL @ IPP=45A | 26–30V clamping voltage - limits downstream IC voltage stress during full-rated surge event. |
| CJ | 275pF at 0V, 1MHz - low enough to avoid signal integrity degradation on 12V power bus routing. |
| IR @ VRWM | 5–100nA reverse leakage - negligible load on 12V supply, critical for battery-backed applications. |
| PPP | 1500W peak pulse power - enables robust single-event energy absorption without thermal runaway. |
Pinout & Package
AOZ8320DI-12 is housed in a RoHS-compliant DFN1.6×0.8_2L package (1.6mm × 0.8mm, 0.5mm pitch), with exposed pad for thermal enhancement and no internal die attach paddle connection required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Input line connection (e.g., 12V rail) | Accepts positive transients; conducts to cathode when voltage exceeds VBR. |
| Pin 2 (Cathode) | Ground reference terminal | Sinks surge current to system ground; must be low-inductance path for effective clamping. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD rating | ±30kV air and contact - exceeds Level 4 requirement, eliminating need for external ESD staging. |
| IEC 61000-4-5 surge capability | 45A (8/20µs) at 12V - protects against lightning-induced surges on industrial or automotive 12V inputs. |
| Low clamping ratio | VCL/VBR ≈ 1.73–2.0 (at 45A) - tight voltage control preserves margin for 12V-rated downstream ICs. |
| Ultra-small footprint | DFN1.6×0.8_2L - saves >60% board area vs. SOD-123, enabling placement directly at connector entry points. |
| HBM ESD rating | ±30kV - safeguards assembly and handling in automated manufacturing environments. |
Applications
| USB Voltage Bus Protection | Battery Protection Circuit |
|---|---|
|
Use Scenario: Protecting 12V input to USB PD sink controllers or hub power switches from hot-plug transients and cable coupling noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND, clamping overvoltage before it reaches USB controller ICs. Use Value: Prevents latch-up or gate oxide damage in 12V-tolerant USB interface ICs during repeated insertion cycles. |
Use Scenario: Safeguarding lithium-ion battery management ICs and charge path MOSFETs from load-dump spikes in portable power banks. IC Role / Device Role / Timing Role: Primary surge clamp on battery input rail, activated within <1ns to limit voltage excursion during sudden load disconnect. Use Value: Maintains safe operating area for battery FETs rated at 20V, avoiding avalanche failure during 12V system surges. |
| Mobile Device Power Rail | Screen Panel Power Input |
|
Use Scenario: Securing 12V backlight or camera module power lines in smartphones and tablets against ESD from flex-cable connectors. IC Role / Device Role / Timing Role: Point-of-entry TVS on PMIC-supplied 12V rail, absorbing ±30kV contact discharge per IEC 61000-4-2. Use Value: Eliminates need for secondary RC filtering, preserving power efficiency and reducing BOM count in space-constrained designs. |
Use Scenario: Shielding TFT-LCD or OLED panel 12V logic supply from EFT bursts induced by nearby motor drivers or switching regulators. IC Role / Device Role / Timing Role: Fast-response TVS on panel VDD line, suppressing 5/50ns EFT pulses (80A) per IEC 61000-4-4. Use Value: Prevents display flicker or pixel corruption caused by transient-induced voltage sag or overshoot on panel supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | DO-214AC package (4.5×2.7mm), 400W PPP, 32.4V VCL @ 32.5A - larger footprint, lower power rating. | Used in legacy industrial PCBs where DFN rework is not feasible; less suitable for mobile or display modules. | Select SMAJ12A only if board layout cannot accommodate DFN1.6×0.8 or requires higher thermal mass. |
| SP1003-010 | SOD-323 package (1.7×1.25mm), 150W PPP, 19.5V VCL @ 10A - lower surge rating, higher capacitance (350pF). | Fits tighter spaces than AOZ8320DI-12 but insufficient for IEC 61000-4-5 compliance on 12V rails. | Choose SP1003-010 only for ESD-only protection (e.g., low-speed data lines), not power rail surge. |
Compared with SMAJ12A and SP1003-010, AOZ8320DI-12 delivers 3.75× higher peak pulse power in 40% less area and achieves 26–30V clamping at 45A - making it the only option among the three qualified for full IEC 61000-4-5 Level 3 compliance on compact 12V power rails.
Availability
AOZ8320DI-12 is available at Aetrix Electronics and suitable for USB voltage bus protection, battery protection circuits, and mobile device power rail hardening requiring stable component supply and long-term lifecycle assurance.
Supply support for AOZ8320DI-12 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 consumer, computing, and industrial markets.
The AOZ8320DI family was developed to deliver high-power, ultra-compact TVS protection for modern 2.5–36V power rails - targeting space-constrained, high-reliability applications in mobile, display, and portable electronics.
FAQ
What is the maximum clamping voltage of AOZ8320DI-12 under a 45A IEC 61000-4-5 surge?
The AOZ8320DI-12 clamps to 26–30V (minimum to maximum) when subjected to a 45A, 8/20µs surge pulse per IEC 61000-4-5. This value is measured across the device terminals with specified test conditions and ensures downstream 12V-rated ICs remain within safe operating voltage limits during worst-case transients. The AOZ8320DI-12 datasheet specifies this range on Page 5 under "Clamping Voltage" for IPP = 45A.
Does AOZ8320DI-12 meet IEC 61000-4-2 Level 4 ESD requirements?
Yes, AOZ8320DI-12 exceeds IEC 61000-4-2 Level 4, supporting ±30kV air discharge and ±30kV contact discharge - double the ±15kV/±8kV minimum required. This performance is verified per the manufacturer's characterization and documented in the "Features" section (Page 1) and "Absolute Maximum Ratings" table (Page 2) of the AOZ8320DI-12 datasheet.
What is the junction capacitance of AOZ8320DI-12 and why does it matter?
The AOZ8320DI-12 exhibits 275pF junction capacitance at 0V and 1MHz, measured pin-to-ground. This low value minimizes high-frequency loading on 12V power rails, preventing unwanted filtering or instability in fast-switching power delivery networks - especially critical in USB PD and display panel applications where rail integrity affects timing margins. The value is confirmed in the Electrical Characteristics table on Page 5 of the AOZ8320DI-12 datasheet.
Can AOZ8320DI-12 be used on a 5V rail instead of a 12V rail?
No - AOZ8320DI-12 is specifically rated for 12V reverse working voltage (VRWM) and begins clamping above ~13.2V. Using it on a 5V rail would cause premature conduction and excessive leakage, potentially disrupting system operation. For 5V rails, the AOZ8320DI-05 variant (5V VRWM) is specified and validated. This distinction is clearly defined in the Ordering Information table (Page 2) and Electrical Characteristics (Page 4) of the AOZ8320DI datasheet.
What package type and dimensions does AOZ8320DI-12 use?
AOZ8320DI-12 uses the DFN1.6×0.8_2L package: 1.6mm length × 0.8mm width × 0.55mm height, with 0.5mm pin pitch and two terminals (anode/cathode). Land pattern and mechanical drawings are provided on Page 9 of the AOZ8320DI-12 datasheet, including tolerance and warpage specifications compliant with IPC-7351B.
AOZ8320DI-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 0603 (1608 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.2V
- Voltage - Clamping (Max) @ Ipp:
- 30V
- Current - Peak Pulse (10/1000µs):
- 45A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 275pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x.8)
AOZ8320DI-12 FAQ
1.How can I place an order for AOZ8320DI-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8320DI-12 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 AOZ8320DI-12 reliable?
The price and inventory of AOZ8320DI-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8320DI-12 is usually 5 days.
3.What payment methods are accepted for AOZ8320DI-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8320DI-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8320DI-12?
AOZ8320DI-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8320DI-12 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 AOZ8320DI-12?
For technical support, including AOZ8320DI-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8320DI-12 requirements.
6.How does Aetrix verify that AOZ8320DI-12 is sourced from the original manufacturer or authorized distributors?
All AOZ8320DI-12 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 AOZ8320DI-12 meets industry standards.
7.What is the process for return or replacement of AOZ8320DI-12?
All AOZ8320DI-12 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8320DI-12, 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 AOZ8320DI-12 part is unused and in its original packaging.
Return procedure for AOZ8320DI-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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