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Alpha & Omega Semiconductor Inc. AOZ8211NI-05
- Part No.:
- AOZ8211NI-05
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- SOD-923
- Datasheet:
-
AOZ8211NI-05.pdf
- Description:
- TVS DIODE 5VWM 10VC SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:6,252
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Product details
Overview
AOZ8211NI-05 from Alpha & Omega Semiconductor is a unidirectional single-line TVS diode in SOD923 package, designed for ESD and transient protection of 5V signal lines. It delivers ±28kV IEC 61000-4-2 contact/air discharge immunity, 9.0V max clamping voltage at 5A IPP, and 16pF typical capacitance at 0V bias - enabling robust protection for high-speed data interfaces in space-constrained portable electronics.
For engineers reviewing the AOZ8211NI-05 datasheet, pinout, applications, or equivalent options, key selection criteria include working peak reverse voltage (5.0V), low clamping voltage under surge, ultra-small 1.0×0.6mm footprint, and compatibility with IEC 61000-4-2 Level 4 ESD requirements in handheld and portable designs.
Technical Context
The AOZ8211NI-05 operates as a unidirectional avalanche breakdown TVS diode, clamping transients by shunting excess current to ground when reverse voltage exceeds 6.0V breakdown threshold. Its design targets fast response to sub-nanosecond ESD events while maintaining low insertion loss (<−25dB up to 1GHz) and minimal signal distortion on protected lines.
It functions exclusively in reverse-biased configuration between signal line and ground, with cathode connected to signal and anode to ground. The device exhibits 0.75V typical forward voltage at 10mA and ≤0.1µA leakage at 5.0V VRWM, ensuring negligible standby power impact on 5V logic and interface circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.0V maximum working peak reverse voltage - defines maximum continuous signal swing before conduction begins |
| VBR @ IT=1mA | 6.0V maximum breakdown voltage - ensures reliable turn-on during ESD transients above system operating voltage |
| VCL @ IPP=5A | 9.0V maximum clamping voltage - limits voltage seen by downstream ICs during 8/20µs surge events |
| CJ @ 0V, 1MHz | 16pF typical junction capacitance - enables use on USB 2.0, I²C, and other <100MHz data lines without signal integrity loss |
| ESD Rating (IEC 61000-4-2) | ±28kV contact & air - exceeds Level 4 requirement, suitable for front-panel button/keypad ESD hardening |
| Package | SOD923 (1.0 × 0.6 × 0.4 mm) - supports automated placement in ultra-dense PCB layouts for portable devices |
| Operating Temp | −40°C to +85°C ambient - validated for consumer and industrial portable equipment environments |
Pinout & Package
SOD923 surface-mount package: ultra-compact 2-terminal device with cathode marking on top surface; body dimensions 1.0mm × 0.6mm × 0.4mm; anode and cathode terminals located on opposite ends of the rectangular die outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Protected Signal Input | Connected directly to the vulnerable data line (e.g., USB D+, I²C SDA); conducts during overvoltage to clamp |
| Anode | Ground Reference | Connected to system ground plane; provides low-impedance return path for ESD current during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | ±28kV contact & air - eliminates need for external ESD filters on exposed buttons, ports, and touch interfaces |
| Low clamping voltage | 9.0V max at 5A - protects 5V-tolerant I/O pins (e.g., microcontroller GPIO, USB PHY) from latch-up or damage |
| Ultra-low capacitance | 16pF typical - preserves signal rise/fall times on high-speed digital lines without added jitter or attenuation |
| Small SOD923 footprint | 1.0 × 0.6 mm - reduces PCB area by >50% vs. SOD-123 or SC-70 packages, critical for slim mobile enclosures |
Applications
| USB 2.0 Data Lines | Keypad & Button Interfaces |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports against ESD from user handling and cable hot-plug events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed inline between connector and USB transceiver IC. Use Value: Maintains <16pF loading to preserve 480Mbps eye diagram integrity while clamping to ≤9.0V during ±28kV contact discharge. | Use Scenario: Shielding mechanical keypad matrix rows/columns from ESD during user finger contact in handheld remotes or medical devices. IC Role / Device Role / Timing Role: Single-line transient suppressor per key trace, grounded at PCB edge via short low-inductance path. Use Value: Prevents false keypresses and microcontroller reset caused by ESD-induced voltage spikes exceeding 5V logic thresholds. |
| Notebook Touchpad Traces | Digital Camera Control Buttons |
Use Scenario: Safeguarding I²C or SPI traces connecting trackpad controller to host CPU against ESD from palm rest or stylus interaction. IC Role / Device Role / Timing Role: Low-capacitance TVS on each bidirectional signal line, positioned adjacent to connector entry point. Use Value: Enables full I²C compliance (≤400kHz) with no clock stretching or data corruption due to ESD-induced noise coupling. | Use Scenario: Hardening momentary pushbuttons (zoom, shutter, mode) on compact digital cameras exposed to frequent user handling. IC Role / Device Role / Timing Role: Discrete TVS per switch line, mounted within 2mm of button pad to minimize loop inductance. Use Value: Eliminates firmware lockup or sensor initialization failure triggered by ±28kV air discharge across plastic housing gaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | DO-214AC package (4.5 × 2.7 mm); 9.2V VCL @ 5A; 100pF CJ - 6× larger footprint, higher capacitance | Used where board space is unconstrained and lower-frequency signals (≤10MHz) dominate | Choose SMAJ5.0A only if SOD923 placement is mechanically infeasible and signal bandwidth <10MHz |
| TPD2E001DRYR | 2-channel array in X2SON (1.0 × 0.8 mm); 12V VCL @ 1A; 12pF CJ - dual-line protection, higher clamping, same size class | Preferred for differential pairs (e.g., USB D+/D−) requiring matched protection | Select TPD2E001DRYR when protecting two related 5V lines simultaneously with tighter layout control |
Compared with SMAJ5.0A and TPD2E001DRYR, the AOZ8211NI-05 offers the smallest single-line footprint and lowest clamping voltage among RoHS-compliant 5V TVS diodes - making it optimal for discrete, space-limited, high-speed signal protection where individual line control is required.
Availability
AOZ8211NI-05 is available at Aetrix Electronics and suitable for portable handheld devices, notebook computers, and digital camera designs requiring stable component supply and guaranteed RoHS/Green compliance.
Supply support for AOZ8211NI-05 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 MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.
The AOZ8211 family was developed specifically for ESD-hardened signal line protection in ultra-thin consumer electronics, emphasizing minimal capacitance, sub-millimeter packaging, and certified IEC 61000-4-2 performance.
FAQ
What is the maximum clamping voltage of the AOZ8211NI-05 under a 5A 8/20µs surge?
The AOZ8211NI-05 has a maximum clamping voltage (VCL) of 9.0V when subjected to a 5A peak pulse current with 8/20µs waveform. This value is measured at TA = 25°C and ensures downstream 5V-tolerant ICs remain within safe operating voltage limits during transient events. The AOZ8211NI-05 maintains this clamping performance across its full −40°C to +85°C operating range, as verified in Alpha & Omega's Rev. 2.5 datasheet.
Does the AOZ8211NI-05 support bidirectional ESD protection?
No, the AOZ8211NI-05 is a unidirectional TVS diode intended for protection of positive-going transients on 5V signal lines referenced to ground. Its breakdown occurs only in reverse bias; it does not suppress negative excursions below ground. For bidirectional protection, a separate device such as AOZ8212 or symmetric dual-diode array would be required. The AOZ8211NI-05 pinout and electrical characteristics confirm single-polarity operation.
What is the junction capacitance of the AOZ8211NI-05 at zero bias and 1MHz?
The AOZ8211NI-05 exhibits 16pF typical junction capacitance (CJ) when measured at 0V reverse bias and 1MHz frequency. This low value is confirmed in the Electrical Characteristics table of the official datasheet and enables use on high-speed interfaces including USB 2.0 and I²C without degrading signal integrity. The AOZ8211NI-05's capacitance remains stable up to 5V bias, supporting consistent performance across normal operating conditions.
Is the AOZ8211NI-05 compatible with lead-free reflow soldering processes?
Yes, the AOZ8211NI-05 is qualified for standard lead-free reflow soldering per JEDEC J-STD-020. Its SOD923 package uses matte tin plating and is rated for peak reflow temperatures up to 260°C. The device is RoHS compliant and marked with "L" suffix (AOZ8211NI-05L) to indicate halogen-reduced Green Product status. AOZ8211NI-05 meets IPC-A-610 Class 2 requirements for consumer electronics assembly.
How does the AOZ8211NI-05 meet IEC 61000-4-2 Level 4 ESD requirements?
The AOZ8211NI-05 exceeds IEC 61000-4-2 Level 4 with ±28kV air and ±28kV contact discharge ratings - surpassing the standard's ±15kV air / ±8kV contact requirement. This margin is achieved through optimized silicon geometry and low-parasitic packaging. When integrated per Alpha & Omega's recommended layout (short ground path, cathode-to-signal routing), the AOZ8211NI-05 enables full system-level pass certification without additional filtering components.
AOZ8211NI-05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- SOD-923
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 10V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 16pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-923
AOZ8211NI-05 FAQ
1.How can I place an order for AOZ8211NI-05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8211NI-05 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 AOZ8211NI-05 reliable?
The price and inventory of AOZ8211NI-05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8211NI-05 is usually 5 days.
3.What payment methods are accepted for AOZ8211NI-05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8211NI-05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8211NI-05?
AOZ8211NI-05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8211NI-05 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 AOZ8211NI-05?
For technical support, including AOZ8211NI-05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8211NI-05 requirements.
6.How does Aetrix verify that AOZ8211NI-05 is sourced from the original manufacturer or authorized distributors?
All AOZ8211NI-05 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 AOZ8211NI-05 meets industry standards.
7.What is the process for return or replacement of AOZ8211NI-05?
All AOZ8211NI-05 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8211NI-05, 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 AOZ8211NI-05 part is unused and in its original packaging.
Return procedure for AOZ8211NI-05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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