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Alpha & Omega Semiconductor Inc. AOZ8320DI-20
- Part No.:
- AOZ8320DI-20
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0603 (1608 Metric)
- Datasheet:
-
AOZ8320DI-20.pdf
- Description:
- TVS DIODE 20VWM 44VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,448
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Product details
Overview
AOZ8320DI-20 from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for single-line surge and ESD protection on 20V power rails, featuring 32A IEC 61000-4-5 (8/20µs) peak pulse current, 1200W peak pulse power, and 165pF junction capacitance - deployed in USB power delivery, battery protection circuits, and mobile device power bus interfaces.
For engineers reviewing the AOZ8320DI-20 datasheet, pinout, applications, or equivalent options, key selection criteria include reverse working voltage (20V), clamping voltage under 44V at 32A, ultra-low leakage (<100nA), DFN1.6×0.8_2L package compatibility, and compliance with IEC 61000-4-2 (±30kV contact/air), IEC 61000-4-4 (80A EFT), and IEC 61000-4-5 standards.
Technical Context
The AOZ8320DI-20 implements a silicon avalanche diode structure optimized for fast response to high-energy transients on DC power lines. Its unidirectional configuration provides asymmetric clamping - forward conduction near 0.9V and reverse clamping up to 44V at 32A - enabling robust overvoltage suppression without affecting normal 20V rail operation.
Designed for placement between I/O line and ground, it operates across -40°C to +125°C ambient and achieves dynamic resistance of 0.12Ω (positive) / 0.1Ω (negative) over 1–30A TLP sweep, ensuring predictable voltage limiting during surge events per IEC 61000-4-5 and ESD stress profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 20 V - maximum continuous DC voltage the device blocks without significant leakage. |
| Peak Pulse Current (IPP) | 32 A (8/20µs waveform) - sustains surge energy up to 1200W without failure. |
| Clamping Voltage (VCL) | 44 V at -32A (8/20µs) - limits downstream voltage to safe levels during worst-case surge. |
| Junction Capacitance (CJ) | 165 pF at 0V, 1MHz - low enough to avoid signal integrity impact on 20V power bus routing. |
| ESD Rating (IEC 61000-4-2) | ±30 kV air & contact - exceeds Level 4 requirement, eliminating need for external ESD staging. |
| Leakage Current (IR) | <100 nA at 20V - negligible standby power loss in battery-critical applications. |
| Package | DFN1.6×0.8_2L - 1.6 mm × 0.8 mm footprint enables compact placement adjacent to protected ICs. |
Pinout & Package
AOZ8320DI-20 is housed in a RoHS-compliant, moisture-sensitive level 1 (MSL1) DFN1.6×0.8_2L package with two terminals: Pin 1 (Anode) connects to the protected power line; Pin 2 (Cathode) connects to system ground. No thermal pad or exposed metal; body dimensions are 1.6 mm × 0.8 mm × 0.55 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Protected Line Input | Connected directly to 20V rail (e.g., USB VBUS, battery input); conducts during reverse overvoltage. |
| Pin 2 (Cathode) | Ground Reference | Tied to low-impedance system ground plane; completes clamping path for surge current dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables precise 20V rail protection with minimal forward voltage drop (~0.9V) during fault conditions. |
| IEC 61000-4-5 compliant (32A, 8/20µs) | Validated surge immunity for industrial and automotive power inputs without external series impedance. |
| Ultra-low leakage (<100nA @ 20V) | Preserves battery life in portable devices where quiescent current must remain sub-µA. |
| 165pF junction capacitance | Minimizes high-frequency noise coupling and avoids resonance issues on 20V power distribution networks. |
| Green, halogen-free, RoHS-compliant | Meets global environmental regulations and supports lead-free reflow soldering (JEDEC J-STD-020 MSL1). |
Applications
| USB Power Delivery Protection | Battery Input Surge Suppression |
|---|---|
|
Use Scenario: Protects 20V USB PD input stage from lightning-induced surges and hot-plug transients in portable chargers and power banks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND, clamping transients within 1ns to prevent damage to buck controllers and load switches. Use Value: Limits clamped voltage to ≤44V at 32A, keeping downstream 20V-rated ICs within absolute maximum ratings during IEC 61000-4-5 testing. |
Use Scenario: Shields lithium-ion battery management ICs from ESD and load-dump spikes during charging/discharging cycles in handheld medical devices. IC Role / Device Role / Timing Role: Primary overvoltage clamp on battery input rail, activated before internal BMS protection thresholds are exceeded. Use Value: Delivers ±30kV IEC 61000-4-2 ESD immunity and 1200W surge handling while adding only 165pF loading to the battery sensing path. |
| Mobile Device Power Bus | Industrial 20V Sensor Interface |
|
Use Scenario: Integrated into smartphone/tablet PMIC input rails to guard against cable-induced ESD and inductive switching noise from display backlight drivers. IC Role / Device Role / Timing Role: First-line defense on main 20V power domain, positioned upstream of DC-DC converters and LDOs. Use Value: Achieves <100nA leakage at 20V, avoiding parasitic drain on standby batteries, and maintains stable regulation under repeated ±30kV contact discharge. |
Use Scenario: Protects 20V-powered industrial sensors (e.g., 4–20mA loop-powered transmitters) from field wiring surges in factory automation systems. IC Role / Device Role / Timing Role: Standalone TVS on sensor supply input, rated for continuous operation from −40°C to +125°C ambient. Use Value: Withstands 32A 8/20µs surges per IEC 61000-4-5 and exhibits 0.12Ω dynamic resistance, ensuring predictable clamping behavior across temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | DO-214AC package (4.5mm × 2.7mm); 32.4V VBR; 400W PPP; 350pF CJ | Larger footprint; higher clamping (45.7V @ 32.4A); unsuitable for space-constrained mobile designs | Choose SMAJ20A only if board area allows larger SMC/SMA packages and higher capacitance is acceptable. |
| SP1003-20 | SOD-323 package (1.7mm × 1.25mm); 20V VRWM; 25A IPP; 600W PPP; 200pF CJ | Lower surge rating (25A vs. 32A); lower peak power (600W vs. 1200W); same 20V operating point | Select SP1003-20 when 25A surge margin suffices and tighter layout constraints require SOD-323 form factor. |
Compared with SMAJ20A and SP1003-20, AOZ8320DI-20 delivers superior surge robustness (32A/1200W) in the smallest footprint (DFN1.6×0.8), making it optimal for high-density 20V power rail protection where both space and performance are critical.
Availability
AOZ8320DI-20 is available at Aetrix Electronics and suitable for USB power delivery systems, battery protection circuits, and industrial 20V sensor interfaces requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for AOZ8320DI-20 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 2.5–36V power rails - addressing demand for smaller, greener, and more robust ESD/surge solutions in portable and IoT edge devices.
FAQ
What is the maximum clamping voltage of AOZ8320DI-20 under IEC 61000-4-5 surge conditions?
The AOZ8320DI-20 clamps to a maximum of 44 V at −32 A under IEC 61000-4-5 8/20 µs surge conditions, as specified in the Electrical Characteristics table on page 6 of the Rev. 1.1 datasheet. This value ensures downstream 20V-rated components remain within safe operating limits during standardized surge testing. The clamping voltage is asymmetric due to its unidirectional design, with positive polarity clamping at 40 V under the same current.
Does AOZ8320DI-20 meet IEC 61000-4-2 Level 4 ESD requirements?
Yes, AOZ8320DI-20 exceeds IEC 61000-4-2 Level 4, delivering ±30 kV air discharge and ±30 kV contact discharge protection - double the ±15 kV air / ±8 kV contact required for Level 4. This performance is validated per test condition CDischarge = 150 pF / RDischarge = 330 Ω and applies directly to the AOZ8320DI-20 variant as stated in the General Description and Absolute Maximum Ratings sections.
What is the junction capacitance of AOZ8320DI-20 and how does it affect circuit design?
The AOZ8320DI-20 has a junction capacitance of 165 pF measured at 0 V and 1 MHz, as confirmed in the Electrical Characteristics table on page 6. This low capacitance minimizes high-frequency loading on 20V power rails, preventing resonance or instability in sensitive analog or RF-adjacent circuits - especially critical in mobile devices where PCB space and signal integrity are tightly constrained.
Can AOZ8320DI-20 be used in automotive applications?
AOZ8320DI-20 operates across −40°C to +125°C ambient temperature and meets AEC-Q200 stress test requirements via AOS reliability qualification (HTRB, HAST, Temp Cycle). While not AEC-Q200 certified out-of-box, its thermal and surge performance aligns with non-safety-critical automotive power rail protection - e.g., infotainment USB ports or body control module 20V supplies - pending customer-level validation per ISO 7637-2 and ISO 10605.
What is the recommended PCB land pattern for AOZ8320DI-20?
The manufacturer specifies a DFN1.6×0.8_2L land pattern per page 9 of the datasheet: two 0.8 mm × 0.5 mm solder pads spaced 0.8 mm center-to-center, with 0.2 mm solder mask opening clearance. Thermal relief is not required; solid copper connections to ground and power planes are recommended to maximize surge current dissipation and minimize inductance in the clamping path for AOZ8320DI-20.
AOZ8320DI-20 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):
- 20V (Max)
- Voltage - Breakdown (Min):
- 22V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 32A (8/20µs)
- Power - Peak Pulse:
- 1200W (1.2kW)
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 165pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x.8)
AOZ8320DI-20 FAQ
1.How can I place an order for AOZ8320DI-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8320DI-20 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-20 reliable?
The price and inventory of AOZ8320DI-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8320DI-20 is usually 5 days.
3.What payment methods are accepted for AOZ8320DI-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8320DI-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8320DI-20?
AOZ8320DI-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8320DI-20 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-20?
For technical support, including AOZ8320DI-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8320DI-20 requirements.
6.How does Aetrix verify that AOZ8320DI-20 is sourced from the original manufacturer or authorized distributors?
All AOZ8320DI-20 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-20 meets industry standards.
7.What is the process for return or replacement of AOZ8320DI-20?
All AOZ8320DI-20 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8320DI-20, 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-20 part is unused and in its original packaging.
Return procedure for AOZ8320DI-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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