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Alpha & Omega Semiconductor Inc. AOZ8320DI-08
- Part No.:
- AOZ8320DI-08
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0603 (1608 Metric)
- Datasheet:
-
AOZ8320DI-08.pdf
- Description:
- TVS DIODE 8VWM 24VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,296
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Product details
Overview
AOZ8320DI-08 from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for single-line surge and ESD protection on power rails, with 8 V reverse working voltage (VRWM), 70 A peak pulse current (8/20 µs), and 1500 W peak pulse power. It operates from –40°C to +125°C in a DFN1.6×0.8_2L package and meets IEC 61000-4-2 ±30 kV (air/contact), IEC 61000-4-5 (22–85 A), and IEC 61000-4-4 80 A EFT standards - deployed in USB voltage bus and battery protection circuits.
For engineers reviewing the AOZ8320DI-08 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, clamping behavior under 70 A surge, junction capacitance (425 pF), dynamic resistance (0.05–0.1 Ω), and real-world design implications for rail-level transient suppression in space-constrained mobile and display systems.
Technical Context
The AOZ8320DI-08 implements a single unidirectional avalanche diode structure optimized for fast response to sub-microsecond transients. Its clamping voltage remains ≤24 V at –70 A (8/20 µs), enabling robust overvoltage limiting on 8 V nominal rails without compromising downstream IC survival.
It features low dynamic resistance (0.05–0.1 Ω) across 1–30 A TLP sweep, ensuring predictable voltage rise during surge events, and exhibits 425 pF junction capacitance at 0 V bias - suitable for DC power lines but not high-speed signal lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 8 V - maximum continuous DC voltage before significant leakage; sets upper limit for protected rail voltage. |
| Peak Pulse Current (IPP) | 70 A (8/20 µs) - withstands industrial-grade surge events per IEC 61000-4-5 without failure. |
| Clamping Voltage (VCL) | 24 V at –70 A (8/20 µs) - limits voltage seen by downstream circuitry during worst-case surge. |
| Junction Capacitance (CJ) | 425 pF at 0 V, 1 MHz - negligible impact on DC rail stability; unsuitable for >10 MHz signal paths. |
| ESD Rating | ±30 kV contact/air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for handheld electronics. |
| Operating Temperature | –40°C to +125°C ambient - supports automotive cabin and industrial power module deployments. |
| Package | DFN1.6×0.8_2L - 1.6 mm × 0.8 mm footprint with exposed pad; enables ultra-dense PCB layout. |
Pinout & Package
AOZ8320DI-08 uses a 2-terminal DFN1.6×0.8_2L package with no internal die attach pad connection; both terminals are electrically active - anode and cathode - configured for unidirectional protection between power line and ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode) | Input/Power Line Connection | Connected to protected rail (e.g., USB VBUS); conducts during negative transients only when cathode is grounded. |
| Terminal 2 (Cathode) | Ground Reference | Must be tied directly to system ground plane; establishes reference for clamping action and defines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ±30 kV ESD protection | Eliminates need for external ESD diodes in USB and battery charge path designs. |
| 1500 W peak pulse power (8/20 µs) | Handles repeated lightning-induced surges in industrial power interfaces without degradation. |
| Low dynamic resistance (0.05–0.1 Ω) | Minimizes voltage overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic. |
| RoHS-compliant green packaging | Meets global environmental compliance mandates without performance trade-offs. |
| –40°C to +125°C operation | Validated for under-hood automotive modules and outdoor industrial controllers. |
Applications
| USB Voltage Bus Protection | Battery Protection Circuit |
|---|---|
Use Scenario: Protecting USB VBUS line against hot-plug transients, ESD from user handling, and coupling from adjacent switching regulators. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND, clamping surges before they reach USB controller or PMIC. Use Value: Maintains <8 V steady-state operation while limiting transient excursions to ≤24 V at 70 A - preserving USB 2.0/3.0 PHY integrity. |
Use Scenario: Safeguarding lithium-ion battery input terminals from charger-induced surges and ESD during connector mating. IC Role / Device Role / Timing Role: Primary overvoltage clamp on battery feed line, positioned upstream of fuel gauge and protection IC. Use Value: Withstands ±30 kV ESD and 70 A 8/20 µs surges without latch-up or parametric shift - extending battery management system field life. |
| Mobile Device Power Rails | Screen Panel Power Supply |
Use Scenario: Securing core 8 V supply rail feeding camera modules, audio codecs, or RF front-end ICs in smartphones and tablets. IC Role / Device Role / Timing Role: Point-of-load TVS integrated near IC power pins to suppress board-level coupling noise and ESD injection. Use Value: 425 pF capacitance avoids resonance with typical 10–100 µF bulk capacitors; clamping stays below 24 V even at full 70 A surge. |
Use Scenario: Protecting backlight LED driver inputs and display panel power inputs from ESD during assembly and end-user interaction. IC Role / Device Role / Timing Role: Rail-level transient suppressor on 8 V or 12 V panel supply, mounted adjacent to connector entry point. Use Value: Ultra-small DFN1.6×0.8_2L footprint allows placement within tight bezel margins; RoHS compliance supports global display certifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A | DO-214AC package (4.5 mm × 2.7 mm); 800 W PPP; 10.0 V VBR min; 12.5 V clamping at 52.5 A. | Larger footprint and lower surge rating; suited for non-space-constrained industrial PCBs. | Select SMAJ8.0A only if board area permits larger package and 70 A surge headroom is not required. |
| TPSMF8.0A | SOD-123FL package (2.7 mm × 1.7 mm); 1000 W PPP; 9.1 V VBR min; 12.7 V clamping at 40 A. | Higher VRWM tolerance (8.0 V vs. 8 V), but lower IPP (40 A) and PPP (1000 W) than AOZ8320DI-08. | Choose TPSMF8.0A where cost sensitivity outweighs need for 70 A surge capability and 1500 W rating. |
Compared with SMAJ8.0A and TPSMF8.0A, the AOZ8320DI-08 delivers 70 A surge handling and 1500 W peak power in a 1.6 mm × 0.8 mm footprint - offering 60% smaller area than SMAJ8.0A and 3× higher pulse power than TPSMF8.0A - making it optimal for miniaturized mobile and display power protection.
Availability
AOZ8320DI-08 is available at Aetrix Electronics and suitable for USB voltage bus protection, battery protection circuits, and mobile device power rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AOZ8320DI-08 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 AOZ8320DI family was developed to deliver high-power, ultra-compact TVS protection for modern low-voltage power rails - addressing demand for smaller footprints, higher surge ratings, and guaranteed ESD immunity in portable electronics.
FAQ
What is the clamping voltage of AOZ8320DI-08 at its rated 70 A peak pulse current?
The AOZ8320DI-08 clamps to a maximum of 24 V at –70 A under IEC 61000-4-5 8/20 µs surge conditions. This value is measured across the device terminals with specified test setup and ensures downstream 8 V-rated components remain within safe operating limits during worst-case transients. The AOZ8320DI-08 maintains this clamping performance across its full operating temperature range.
Is AOZ8320DI-08 unidirectional or bidirectional, and how does that affect circuit placement?
The AOZ8320DI-08 is a unidirectional TVS diode, meaning it conducts only during negative transients relative to its cathode terminal. It must be placed with cathode tied to system ground and anode connected to the protected rail - such as USB VBUS or battery positive. Reversing polarity renders it ineffective for positive surges. The AOZ8320DI-08 datasheet explicitly confirms unidirectional configuration in its pinout and electrical characteristics tables.
Does AOZ8320DI-08 meet automotive-grade reliability requirements?
Yes - AOZ8320DI-08 is qualified per AEC-Q200 stress tests including HTRB (150°C, 1000 hrs), HAST (130°C/85% RH), and temperature cycling (–65°C to +150°C). Its FIT rate is 7.63 failures per billion hours, and MTTF exceeds 14,960 years. These results apply directly to AOZ8320DI-08 per AOS Reliability Report AOZ8320DI-05 rev A, extended to all AOZ8320DI variants via shared process and package qualification.
What is the junction capacitance of AOZ8320DI-08, and does it affect high-speed signal lines?
The AOZ8320DI-08 has a junction capacitance of 425 pF at 0 V and 1 MHz - confirmed in the Electrical Characteristics table on page 4 of the datasheet. This value is appropriate for DC power rail protection but too high for USB 2.0 data lines (which require <5 pF) or high-speed interfaces. AOZ8320DI-08 is intended exclusively for power line protection; using it on signal lines would degrade signal integrity. The AOZ8320DI-08 specification sheet explicitly lists "power rail/bus" in its General Description.
How does AOZ8320DI-08 compare to AOZ8320DI-05 in terms of surge capability and application scope?
AOZ8320DI-08 supports 70 A peak pulse current and 1500 W peak pulse power, while AOZ8320DI-05 supports 85 A and 1500 W - both share identical package and temperature range. The key difference is VRWM: AOZ8320DI-08 is rated for 8 V rails, whereas AOZ8320DI-05 targets 5 V systems. Clamping voltage at rated IPP is higher for AOZ8320DI-08 (24 V vs. 16 V), reflecting its higher breakdown threshold. AOZ8320DI-08 is therefore optimal for 8 V battery-fed or auxiliary power rails, not 5 V logic supplies.
AOZ8320DI-08 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):
- 8V (Max)
- Voltage - Breakdown (Min):
- 9V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 70A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 425pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x.8)
AOZ8320DI-08 FAQ
1.How can I place an order for AOZ8320DI-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8320DI-08 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-08 reliable?
The price and inventory of AOZ8320DI-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8320DI-08 is usually 5 days.
3.What payment methods are accepted for AOZ8320DI-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8320DI-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8320DI-08?
AOZ8320DI-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8320DI-08 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-08?
For technical support, including AOZ8320DI-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8320DI-08 requirements.
6.How does Aetrix verify that AOZ8320DI-08 is sourced from the original manufacturer or authorized distributors?
All AOZ8320DI-08 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-08 meets industry standards.
7.What is the process for return or replacement of AOZ8320DI-08?
All AOZ8320DI-08 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8320DI-08, 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-08 part is unused and in its original packaging.
Return procedure for AOZ8320DI-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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