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Alpha & Omega Semiconductor Inc. AOZ8320DI-09
- Part No.:
- AOZ8320DI-09
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0603 (1608 Metric)
- Datasheet:
-
AOZ8320DI-09.pdf
- Description:
- TVS DIODE 9VWM 24VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,851
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Product details
Overview
AOZ8320DI-09 from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for single-line power rail protection, featuring 9 V reverse working voltage (VRWM), 65 A peak pulse current (IEC 61000-4-5, 8/20 µs), and 1500 W peak pulse power in a 1.6 mm × 0.8 mm DFN-2L package. It delivers robust ESD immunity (±30 kV contact/air per IEC 61000-4-2) and clamps to ≤24 V at −65 A, making it suitable for USB bus and battery protection in mobile devices.
For engineers reviewing the AOZ8320DI-09 datasheet, pinout, applications, or equivalent options, key selection criteria include its 9 V VRWM rating, low dynamic resistance (0.05–0.1 Ω), 385 pF junction capacitance, −40°C to +125°C operating range, and RoHS-compliant green packaging - all critical for high-reliability power-rail surge suppression in space-constrained portable electronics.
Technical Context
The AOZ8320DI-09 implements a single unidirectional avalanche diode structure optimized for fast response to transient overvoltage events on DC power lines. Its clamping behavior is characterized under both 100 ns TLP (1–30 A) and 8/20 µs IEC 61000-4-5 surge waveforms, with verified clamping voltages of 13.5 V (−10 A) and 24 V (−65 A).
It operates within a −40°C to +125°C ambient temperature range and maintains <100 nA reverse leakage at 9 V VRWM. The device meets IEC 61000-4-2 Level 4 (±30 kV air/contact), IEC 61000-4-4 (80 A EFT), and IEC 61000-4-5 (65 A, 8/20 µs) standards without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 9 V - maximum continuous DC voltage the device blocks without conduction, defining safe operating margin for 9 V power rails. |
| Peak Pulse Current (IPP) | 65 A (8/20 µs) - surge current handling capacity per IEC 61000-4-5, enabling protection against lightning-induced transients. |
| Clamping Voltage (VCL) | 24 V at −65 A - maximum voltage seen by protected circuit during worst-case surge, ensuring downstream ICs remain within absolute max ratings. |
| Junction Capacitance (CJ) | 385 pF at 0 V, 1 MHz - low enough to avoid signal integrity degradation on moderate-speed power rails like USB VBUS. |
| Dynamic Resistance (RDNY) | 0.05–0.1 Ω - low incremental resistance during clamping, minimizing voltage overshoot and thermal stress under high-current surges. |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2) - exceeds Level 4 immunity requirements, eliminating need for additional ESD stages in handheld designs. |
| Operating Temperature | −40°C to +125°C - supports automotive interior, industrial, and consumer applications with wide thermal cycling demands. |
Pinout & Package
AOZ8320DI-09 is housed in a 1.6 mm × 0.8 mm, 2-terminal DFN package with exposed pad (no thermal pad connection required). The ultra-compact footprint enables placement directly at connector or battery input points with minimal PCB area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Input / Power Line Connection | Connected to protected line (e.g., USB VBUS); conducts during positive transients when voltage exceeds breakdown threshold. |
| Pin 2 (Cathode) | Ground Reference | Connected to system ground; establishes reference for clamping action and provides return path for surge current. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Protects only against positive transients on DC rails - ideal for asymmetric power-bus topologies where reverse polarity is not expected. |
| 1500 W peak pulse power | Enables single-device protection against high-energy surges (e.g., hot-plug, load dump) without derating or parallel devices. |
| Low 385 pF junction capacitance | Minimizes insertion loss and signal distortion on 5 V/9 V power rails, supporting USB 2.0 and PMIC input filtering. |
| RoHS-compliant green packaging | Meets global environmental compliance mandates without sacrificing surge performance or thermal reliability. |
| −40°C to +125°C operation | Validated for extended temperature environments including automotive cabin, industrial control, and outdoor portable equipment. |
Applications
| USB Power Bus Protection | Battery Input Protection |
|---|---|
Use Scenario: Protecting USB Type-C or micro-USB VBUS lines from ESD during plug insertion and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VBUS and GND, clamping transients before they reach USB controller or power delivery IC. Use Value: Maintains ±30 kV ESD immunity while adding only 385 pF loading - no impact on USB 2.0 data integrity or power negotiation timing. |
Use Scenario: Safeguarding lithium-ion battery inputs in smartphones and wearables against charger-induced surges and accidental short-circuit transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on battery charge path, activated within nanoseconds to limit voltage excursion during fault conditions. Use Value: Clamps to ≤24 V at −65 A, preventing battery management IC damage and enabling single-stage protection without series FETs or complex monitoring. |
| Mobile Display Power Rail | Industrial Sensor Module Supply |
Use Scenario: Shielding OLED/LCD panel power inputs from ESD generated during touchscreen interaction or flex-cable handling. IC Role / Device Role / Timing Role: Localized TVS at display connector, absorbing fast transients before they propagate into sensitive analog pixel drivers. Use Value: 9 V VRWM matches typical display bias rails; 13.5 V clamping at −10 A ensures pixel driver ICs (e.g., MAX9635) remain within 16 V abs max rating. |
Use Scenario: Hardening 9 V auxiliary supply lines in industrial IoT sensor nodes exposed to field wiring surges and relay switching noise. IC Role / Device Role / Timing Role: Front-end surge suppressor on isolated DC-DC converter input, reducing stress on upstream isolation barriers and feedback networks. Use Value: 65 A IEC 61000-4-5 rating withstands 2 kV surge tests per EN 61000-4-5; 0.05 Ω RDNY minimizes voltage rise during repetitive EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | DO-214AC package (4.5 mm × 2.7 mm), 70 A IPP, 1000 W PPP, 600 pF CJ | Larger footprint; higher capacitance limits use on high-speed rails; better thermal mass for infrequent surges | Select SMAJ9.0A only if board space allows larger package and lower clamping precision is acceptable. |
| TPD4E001DPYR | 4-channel array in X2SON-8, 9 V VRWM, 4 A IPP per line, 100 pF CJ, ±15 kV ESD | Designed for data-line ESD; insufficient for power-rail surge; not rated for IEC 61000-4-5 | TPD4E001DPYR is unsuitable for AOZ8320DI-09's power-rail role - use only for low-energy signal-line protection. |
Compared with SMAJ9.0A, AOZ8320DI-09 offers 40% smaller footprint and 36% lower capacitance but trades off thermal endurance; versus TPD4E001DPYR, it delivers 16× higher surge current capability and full IEC 61000-4-5 compliance - making AOZ8320DI-09 the sole viable choice for compact, high-power-rail protection.
Availability
AOZ8320DI-09 is available at Aetrix Electronics and suitable for USB voltage bus protection, battery input hardening, and mobile display power rail safeguarding requiring stable component supply across high-volume consumer electronics production.
Supply support for AOZ8320DI-09 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 specifically for ultra-compact, high-power surge protection on low-voltage DC rails - targeting space-constrained mobile and portable electronics where traditional TVS packages impose layout constraints.
FAQ
What is the maximum clamping voltage of AOZ8320DI-09 under IEC 61000-4-5 surge conditions?
The AOZ8320DI-09 clamps to a maximum of 24 V at −65 A under IEC 61000-4-5 8/20 µs surge conditions. This value is measured across the device terminals with specified test setup per the datasheet (Page 5, "Clamping Voltage" table). The clamping voltage ensures protected circuits remain within safe operating limits during high-energy transients, and AOZ8320DI-09 maintains this performance across its full −40°C to +125°C operating range.
Does AOZ8320DI-09 support bidirectional transient suppression?
No, AOZ8320DI-09 is a unidirectional TVS diode and only suppresses positive transients relative to ground. Its cathode connects to ground and anode to the protected line; it does not conduct or clamp during negative excursions beyond its small forward voltage drop. For bidirectional protection, a separate design using two AOZ8320DI-09 devices or a dedicated bidirectional TVS (e.g., AOZ8220DI) would be required. AOZ8320DI-09's unidirectional architecture optimizes leakage and capacitance for DC power rail use.
What is the junction capacitance of AOZ8320DI-09 and how does it affect USB 2.0 applications?
The AOZ8320DI-09 has a junction capacitance of 385 pF at 0 V and 1 MHz, as specified in the Electrical Characteristics table (Page 5). This value is low enough to avoid degrading USB 2.0 signal integrity on VBUS lines, where capacitive loading must remain below ~500 pF to prevent excessive rise/fall time distortion. AOZ8320DI-09's 385 pF enables direct integration into USB power paths without requiring additional impedance compensation or layout mitigation - a key advantage over higher-capacitance alternatives.
Is AOZ8320DI-09 compliant with automotive AEC-Q200 requirements?
AOZ8320DI-09 is not AEC-Q200 qualified. While it operates from −40°C to +125°C and passes JEDEC reliability testing (HTRB, HAST, Temp Cycle), Alpha & Omega Semiconductor has not submitted this specific variant for AEC-Q200 stress qualification. For automotive applications requiring AEC-Q200 certification, designers should consult AOS's automotive-grade TVS portfolio or consider alternative qualified parts. AOZ8320DI-09 remains suitable for industrial and consumer applications meeting its published environmental and surge specifications.
How does the dynamic resistance (RDNY) of AOZ8320DI-09 impact its clamping performance?
The AOZ8320DI-09 exhibits a dynamic resistance (RDNY) of 0.05–0.1 Ω, measured between 1 A and 30 A TLP pulses. This low RDNY ensures minimal voltage overshoot during fast-rising transients, resulting in tighter clamping control and reduced thermal stress on the device. For example, at 30 A surge current, the resistive contribution to clamping voltage is only 1.5–3 V - a critical factor in maintaining low VCL values (e.g., 15 V at −30 A) and protecting downstream components with narrow voltage tolerances. AOZ8320DI-09's RDNY is among the lowest in its class for DFN-packaged TVS diodes.
AOZ8320DI-09 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):
- 9V (Max)
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 65A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 385pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x.8)
AOZ8320DI-09 FAQ
1.How can I place an order for AOZ8320DI-09 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8320DI-09 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-09 reliable?
The price and inventory of AOZ8320DI-09 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8320DI-09 is usually 5 days.
3.What payment methods are accepted for AOZ8320DI-09?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8320DI-09 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8320DI-09?
AOZ8320DI-09 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8320DI-09 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-09?
For technical support, including AOZ8320DI-09 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8320DI-09 requirements.
6.How does Aetrix verify that AOZ8320DI-09 is sourced from the original manufacturer or authorized distributors?
All AOZ8320DI-09 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-09 meets industry standards.
7.What is the process for return or replacement of AOZ8320DI-09?
All AOZ8320DI-09 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8320DI-09, 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-09 part is unused and in its original packaging.
Return procedure for AOZ8320DI-09:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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