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Alpha & Omega Semiconductor Inc. AOZ8211DI-12
- Part No.:
- AOZ8211DI-12
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
AOZ8211DI-12.pdf
- Description:
- TVS DIODE 12VWM 21VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,848
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Product details
Overview
AOZ8211DI-12 from Alpha and Omega Semiconductor is a unidirectional single-line TVS diode designed for ESD and transient protection of 12 V signal lines. It features a working peak reverse voltage of 12.0 V, clamping voltage of 18.0 V at 1 A IPP, 21.0 V at 12 A IPP, 30 pF typical capacitance at 0 V, and ±28 kV IEC 61000-4-2 contact ESD rating. It is used in portable electronics to safeguard USB, keypad, and data interface lines against electrostatic discharge.
For engineers reviewing the AOZ8211DI-12 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 12 A transients, low 30 pF capacitance for high-speed signal integrity, 12 V operating voltage compatibility, and DFN 1.0 × 0.6 mm footprint constraints.
Technical Context
The AOZ8211DI-12 operates as a unidirectional avalanche diode with cathode-grounded configuration, enabling fast response (<1 ns) to ESD events per IEC 61000-4-2. Its breakdown voltage is 14.0 V minimum at 1 mA test current, and it maintains low leakage (≤0.1 µA at 12 V) across -40 °C to +85 °C ambient.
It delivers 100 W peak pulse power (8/20 µs waveform) with clamping voltage rising from 18.0 V (IPP = 1 A) to 21.0 V (IPP = 12 A), supporting robust protection without signal distortion on 12 V rails. The device uses silicon planar technology in a lead-free, RoHS-compliant DFN package with no internal series resistance or RC network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 12.0 V - sets maximum continuous DC or AC signal swing before leakage increases significantly |
| Breakdown Voltage | 14.0 V min @ 1 mA - defines onset of avalanche conduction during overvoltage |
| Clamping Voltage | 18.0 V max @ 1 A IPP - limits voltage seen by protected IC during low-energy transients |
| Peak Pulse Current | 5 A @ 8/20 µs - supports IEC 61000-4-5 surge immunity up to Level 3 |
| Capacitance | 30 pF @ 0 V, 1 MHz - preserves signal integrity on 12 V data lines up to ~100 MHz |
| ESD Rating (IEC 61000-4-2) | ±28 kV air / ±28 kV contact - exceeds Level 4 immunity requirements |
| Operating Temperature | -40 °C to +85 °C - qualified for consumer and industrial portable equipment environments |
Pinout & Package
AOZ8211DI-12 is housed in an ultra-compact, surface-mount DFN package measuring 1.0 mm × 0.6 mm × 0.5 mm, with exposed thermal pad (non-electrical) and two terminals: Anode (Pin 1) and Cathode (Pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Signal input terminal | Connected to protected line (e.g., USB D+); conducts to ground when voltage exceeds VRWM |
| Pin 2 (Cathode) | Ground reference terminal | Must be connected directly to low-impedance system ground plane for effective transient shunting |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Enables precise 12 V rail protection without forward-bias interference on active-low signals |
| Low 30 pF junction capacitance | Minimizes signal rise-time degradation on 12 V high-speed interfaces such as HDMI CEC or UART |
| 18.0 V clamping at 1 A IPP | Ensures downstream 12 V logic ICs remain within absolute maximum ratings during ESD events |
| RoHS-compliant DFN package | Supports automated reflow assembly and meets environmental compliance for global portable product markets |
Applications
| USB 2.0 Data Lines | Industrial Keypad Inputs |
|---|---|
Use Scenario: Protecting D+ and D− lines in battery-powered USB peripherals against user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed inline between connector and USB transceiver IC. Use Value: Clamps transients to ≤21.0 V while adding only 30 pF loading, preserving full-speed USB signal fidelity. | Use Scenario: Shielding microcontroller GPIO inputs tied to membrane keypad traces in factory HMIs. IC Role / Device Role / Timing Role: Standalone ESD suppressor on each key trace, grounded locally to reduce loop inductance. Use Value: Withstands ±28 kV contact discharge without latch-up, ensuring keypad reliability in dusty, high-static environments. |
| Automotive Infotainment Buttons | 12 V Sensor Interface Lines |
Use Scenario: Guarding tactile switch inputs on center-stack displays exposed to glove-based ESD in vehicles. IC Role / Device Role / Timing Role: Single-line TVS mounted adjacent to switch pads, referenced to chassis ground. Use Value: Maintains 12 V nominal operation and clamps to 21.0 V during 12 A surges, preventing MCU reset or false key detection. | Use Scenario: Safeguarding analog or digital outputs of 12 V automotive sensors (e.g., temperature, pressure) against load-dump coupling. IC Role / Device Role / Timing Role: Point-of-entry protection on sensor harness interface PCBs. Use Value: 100 W peak power rating handles coupled transients from nearby solenoid switching without degradation. |
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 (4.5 × 2.7 mm); 12.2 V VRWM; 19.9 V VCL @ 5.3 A; 100 pF | Higher capacitance and larger footprint limit use in space-constrained portable designs | Preferred where board area is available and higher surge current (23.3 A) is required |
| TPD2E001DRYR | DFN 1.0 × 0.6 mm; dual-channel; 5.5 V VRWM; 12 pF; ±8 kV IEC 61000-4-2 | Lower voltage rating and lower ESD level make it unsuitable for 12 V systems | Only viable for sub-6 V data lines; not a functional replacement for AOZ8211DI-12 |
Compared with SMAJ12A and TPD2E001DRYR, the AOZ8211DI-12 uniquely balances 12 V operation, ultra-low 30 pF capacitance, ±28 kV ESD rating, and 1.0 × 0.6 mm footprint-making it optimal for miniaturized 12 V interface protection where signal integrity and board space are critical.
Availability
AOZ8211DI-12 is available at Aetrix Electronics and suitable for portable handheld devices, industrial keypad interfaces, and automotive infotainment button protection requiring stable component supply and consistent ESD performance.
Supply support for AOZ8211DI-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 efficiency-critical applications.
The AOZ8211DI family targets compact, high-reliability ESD protection for voltage-sensitive signal paths in portable and industrial electronics, with variants optimized for 2.5 V to 24 V operating rails.
FAQ
What is the working peak reverse voltage of the AOZ8211DI-12?
The AOZ8211DI-12 has a working peak reverse voltage (VRWM) of 12.0 V, meaning it remains in high-impedance blocking mode for continuous signal voltages up to this level. This value ensures compatibility with standard 12 V logic and interface rails while maintaining low leakage current (≤0.1 µA) at rated temperature.
Does the AOZ8211DI-12 meet IEC 61000-4-2 Level 4 ESD requirements?
Yes, the AOZ8211DI-12 exceeds IEC 61000-4-2 Level 4 with ±28 kV air and ±28 kV contact discharge ratings. This surpasses the Level 4 requirement of ±15 kV air and ±8 kV contact, making AOZ8211DI-12 suitable for high-reliability consumer and industrial applications where robust human-handling ESD immunity is mandatory.
What is the clamping voltage behavior of the AOZ8211DI-12 under surge conditions?
The AOZ8211DI-12 clamps to 18.0 V at 1 A peak pulse current, 20.0 V at 5 A, and 21.0 V at 12 A (8/20 µs waveform). This progressive clamping ensures protected circuitry sees minimal overvoltage even during high-energy transients, directly supporting design margin for 12 V-rated ICs.
Can the AOZ8211DI-12 be used on bidirectional signal lines?
No, the AOZ8211DI-12 is a unidirectional TVS diode intended only for single-polarity signal lines referenced to ground. For bidirectional protection (e.g., USB D+/D− differential pair), a dual-channel or symmetric TVS like AOZ8212DI would be required-not AOZ8211DI-12.
What package type and dimensions does the AOZ8211DI-12 use?
The AOZ8211DI-12 uses a RoHS-compliant DFN package sized 1.0 mm × 0.6 mm × 0.5 mm with two terminals (Anode and Cathode). Its ultra-small footprint enables placement directly at connectors or IC pins in space-constrained portable designs, and the exposed thermal pad aids heat dissipation during repetitive transients.
AOZ8211DI-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):
- 14V
- Voltage - Clamping (Max) @ Ipp:
- 21V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 30pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1x0.6)
AOZ8211DI-12 FAQ
1.How can I place an order for AOZ8211DI-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8211DI-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 AOZ8211DI-12 reliable?
The price and inventory of AOZ8211DI-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8211DI-12 is usually 5 days.
3.What payment methods are accepted for AOZ8211DI-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8211DI-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8211DI-12?
AOZ8211DI-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8211DI-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 AOZ8211DI-12?
For technical support, including AOZ8211DI-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8211DI-12 requirements.
6.How does Aetrix verify that AOZ8211DI-12 is sourced from the original manufacturer or authorized distributors?
All AOZ8211DI-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 AOZ8211DI-12 meets industry standards.
7.What is the process for return or replacement of AOZ8211DI-12?
All AOZ8211DI-12 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8211DI-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 AOZ8211DI-12 part is unused and in its original packaging.
Return procedure for AOZ8211DI-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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