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Alpha & Omega Semiconductor Inc. AOZ8310DI-12
- Part No.:
- AOZ8310DI-12
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
AOZ8310DI-12.pdf
- Description:
- TVS DIODE 12VWM 30VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,119
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Product details
Overview
AOZ8310DI-12 from Alpha and Omega Semiconductor is a unidirectional high-power TVS diode in a 1.6mm × 1.0mm DFN-2L package, designed to protect 12V power rails against IEC 61000-4-5 surges (45A, 8/20µs), IEC 61000-4-2 ESD (±30kV air/contact), and EFT events. It delivers 1500W peak pulse power with 12V reverse working voltage and clamps to ≤30V at 45A.
For engineers reviewing the AOZ8310DI-12 datasheet, pinout, applications, or equivalent options, this device serves as a compact, high-energy surge protector for battery-fed and USB-powered systems where low leakage (<100nA), tight clamping, and ultra-small footprint are critical.
Technical Context
The AOZ8310DI-12 implements a single unidirectional avalanche junction optimized for fast transient response and low dynamic resistance (0.05–0.1Ω). Its clamping behavior is characterized under both TLP (100ns) and IEC 61000-4-5 (8/20µs) waveforms, with verified performance across -40°C to +125°C ambient.
It operates as a rail-to-ground protection device with anode-to-ground configuration, requiring no biasing or control logic. The DFN-2L package enables direct placement adjacent to protected ICs, minimizing trace inductance and preserving clamping effectiveness during multi-kA transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 12 V - Maximum continuous DC voltage the device blocks without conduction. |
| Peak Pulse Current (IPP) | 45 A (8/20µs) - Sustains IEC 61000-4-5 surge stress without failure. |
| Clamping Voltage (VCL) | ≤30 V at IPP = 45A - Limits downstream voltage excursion to safe levels for 12V-rated ICs. |
| Peak Pulse Power (PPP) | 1500 W - Energy-handling capacity sufficient for automotive load-dump and industrial surge events. |
| Junction Capacitance (CJ) | 275 pF at 0V, 1MHz - Low enough to avoid signal integrity impact on DC power rails. |
| Reverse Leakage (IR) | ≤100 nA at 12V - Negligible standby current draw in battery-critical applications. |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2) - Meets Level 4 immunity without external shielding. |
Pinout & Package
AOZ8310DI-12 uses a 2-pin DFN-2L package (1.6mm × 1.0mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is Cathode; Pin 2 is Anode. The device is mounted anode-to-ground for unidirectional rail-to-ground protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Ground reference terminal | Connected directly to system ground plane; provides low-inductance return path for surge current. |
| Cathode (Pin 1) | Protected line terminal | Connected to 12V rail; conducts transient energy to ground when voltage exceeds VBR (13.2–17V). |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-5 compliance | Rated for 45A (8/20µs) surge - protects against industrial and automotive power-line transients. |
| Ultra-low dynamic resistance | 0.05–0.1Ω - minimizes voltage overshoot during fast-rising transients. |
| Low junction capacitance | 275 pF - avoids filtering or loading of 12V supply lines in noise-sensitive systems. |
| High ESD robustness | ±30kV contact/air per IEC 61000-4-2 - eliminates need for secondary ESD stages in portable designs. |
| RoHS/Green compliant | Halogen-free, lead-free DFN package - meets IPC-1752A and EU REACH requirements. |
Applications
| USB Power Delivery Bus | Battery Protection Circuit |
|---|---|
|
Use Scenario: Protects 12V input to USB PD controller ICs and buck converters in portable power banks and docking stations. IC Role / Device Role: Rail-to-ground transient suppressor placed immediately upstream of the PD controller's VBUS input. Use Value: Clamps 45A surges to ≤30V, preventing latch-up or overvoltage damage to 12V-tolerant silicon while adding only 275pF loading. |
Use Scenario: Shields lithium-ion battery management ICs and fuel gauges from load-dump and hot-swap transients in 12V battery packs. IC Role / Device Role: Primary overvoltage clamp on battery positive rail, operating between cell stack and protection FET driver. Use Value: Withstands 1500W pulses and maintains <100nA leakage at 12V, preserving battery shelf life and enabling reliable cold-cranking operation. |
| Automotive Infotainment Display | Industrial PLC I/O Module |
|
Use Scenario: Guards 12V backlight and interface power rails in TFT-LCD modules subjected to ISO 7637-2 pulse 5a/b. IC Role / Device Role: Unidirectional TVS on display power input, mounted within 2mm of connector entry point. Use Value: Delivers 30V clamping at full 45A surge current, ensuring display ICs remain within absolute maximum ratings during engine cranking events. |
Use Scenario: Protects 12V auxiliary power inputs on modular PLC backplanes exposed to relay coil flyback and field-wiring surges. IC Role / Device Role: Point-of-entry surge suppressor on DIN-rail-mounted I/O module power header. Use Value: 1500W rating and -40°C to +125°C operation ensure reliability in uncontrolled industrial environments without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | DO-214AC package (4.5mm × 2.7mm); 400W PPP; 30A IPP; higher CJ (550pF) | Larger footprint limits use in space-constrained mobile designs; lower power rating suits less severe surge environments. | Select SMAJ12A only if board area allows larger package and 400W surge margin is sufficient. |
| TPSMF12A | SOD-123FL package (2.7mm × 1.7mm); 1000W PPP; 32A IPP; VRWM = 12V; CJ = 350pF | Lower peak power and current rating; slightly higher capacitance reduces high-frequency transient suppression margin. | Choose TPSMF12A when cost sensitivity outweighs need for 1500W/45A capability and ultra-low CJ. |
Compared with SMAJ12A and TPSMF12A, AOZ8310DI-12 offers 50% higher peak power and 40% smaller footprint than SMAJ12A, and 50% greater surge current handling than TPSMF12A - making it optimal for next-gen compact, high-reliability 12V rail protection.
Availability
AOZ8310DI-12 is available at Aetrix Electronics and suitable for USB power delivery systems, battery management units, automotive display modules, and industrial PLC I/O modules requiring stable component supply and long-term manufacturability.
Supply support for AOZ8310DI-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 and Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for high-efficiency, high-density power systems.
The AOZ8310DI family was developed to deliver high-energy, ultra-compact transient protection for modern 2.5–36V power rails in space- and reliability-constrained applications such as portable electronics and automotive subsystems.
FAQ
What is the clamping voltage of AOZ8310DI-12 at its rated peak pulse current?
The AOZ8310DI-12 clamps to ≤30 V at its rated peak pulse current of 45 A (8/20 µs waveform), as specified in the Electrical Characteristics table on page 5 of the Rev. 3.0 datasheet. This ensures protected 12V ICs remain within safe operating voltage limits during worst-case surge events.
Does AOZ8310DI-12 meet IEC 61000-4-2 Level 4 ESD requirements?
Yes, AOZ8310DI-12 is rated for ±30 kV air discharge and ±30 kV contact discharge per IEC 61000-4-2, exceeding Level 4 (±15 kV air / ±8 kV contact) requirements. This rating is confirmed in the General Description and Absolute Maximum Ratings sections of the datasheet.
What is the thermal and environmental rating of AOZ8310DI-12?
AOZ8310DI-12 is rated for operation from -40°C to +125°C ambient temperature and storage from -65°C to +150°C. Its RoHS-compliant, halogen-free DFN-2L package supports reflow soldering per J-STD-020 and is qualified for industrial and automotive-grade reliability.
How does the junction capacitance of AOZ8310DI-12 affect its use on a 12V power rail?
With a typical junction capacitance of 275 pF at 0 V and 1 MHz, AOZ8310DI-12 introduces negligible filtering or loading on 12V DC rails. This enables clean, stable power delivery while maintaining effective high-frequency transient suppression - unlike higher-capacitance alternatives that may cause ripple or instability.
Is AOZ8310DI-12 suitable for bidirectional surge protection?
No, AOZ8310DI-12 is a unidirectional TVS diode intended for rail-to-ground protection only. Its electrical characteristics - including reverse breakdown voltage (13.2–17 V) and anode-to-ground pinout - confirm it is not rated for bidirectional operation. For bidirectional protection, a dedicated symmetric TVS such as AOZ8210DI would be required.
AOZ8310DI-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 2-UDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 (1.6x1)
AOZ8310DI-12 FAQ
1.How can I place an order for AOZ8310DI-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8310DI-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 AOZ8310DI-12 reliable?
The price and inventory of AOZ8310DI-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8310DI-12 is usually 5 days.
3.What payment methods are accepted for AOZ8310DI-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8310DI-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8310DI-12?
AOZ8310DI-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8310DI-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 AOZ8310DI-12?
For technical support, including AOZ8310DI-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8310DI-12 requirements.
6.How does Aetrix verify that AOZ8310DI-12 is sourced from the original manufacturer or authorized distributors?
All AOZ8310DI-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 AOZ8310DI-12 meets industry standards.
7.What is the process for return or replacement of AOZ8310DI-12?
All AOZ8310DI-12 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8310DI-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 AOZ8310DI-12 part is unused and in its original packaging.
Return procedure for AOZ8310DI-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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