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Alpha & Omega Semiconductor Inc. AOZ8212BCI-12
- Part No.:
- AOZ8212BCI-12
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AOZ8212BCI-12.pdf
- Description:
- TVS DIODE 12VWM 24VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,237
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Product details
Overview
AOZ8212BCI-12 from Alpha and Omega Semiconductor is a two-line bidirectional TVS diode in SOT-23 package, designed to protect 12 V data lines against ESD (±30 kV air/contact), lightning surges (5 A, 8/20 µs), and EFT (±40 A). It features low clamping voltage (24.0 V max @ IPP = 10 A), low capacitance (12.5 pF typ), and operates within -40°C to +150°C junction temperature range.
For engineers reviewing the AOZ8212BCI-12 datasheet, pinout, applications, or equivalent options, key selection criteria include working peak reverse voltage (12 V), IEC 61000-4-2 Level 4 compliance, bidirectional protection for dual high-speed I/O lines, and SOT-23 footprint constraints.
Technical Context
The AOZ8212BCI-12 integrates two identical bidirectional TVS elements in a single SOT-23-3 package, with pins 1 and 3 serving as protected I/O terminals and pin 2 as common cathode connection. Its symmetrical breakdown behavior (VBR min 13.0 V / max 17.0 V @ 5 mA) enables balanced transient suppression on both signal paths without polarity dependency.
Clamping performance is characterized at 10 A peak pulse current (VCL ≤ 24.0 V), supporting robust protection against IEC 61000-4-5 5 A surges while maintaining low insertion loss due to 10.0 pF typical junction capacitance. The device meets IEC 61000-4-4 EFT immunity at ±40 A and sustains 100 W peak pulse power (8/20 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 12.0 V - defines maximum continuous DC or RMS signal voltage before conduction begins |
| Breakdown Voltage (min/max @ 5 mA) | 13.0 V / 17.0 V - ensures reliable turn-on during transients while avoiding false triggering |
| Clamping Voltage @ 10 A | 24.0 V max - limits voltage seen by downstream ICs during 8/20 µs surge events |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact & air - exceeds Level 4 requirement for handheld device interfaces |
| Junction Capacitance | 12.5 pF typical - preserves signal integrity on USB, I²C, or keypad lines up to ~100 MHz |
| Peak Pulse Current (8/20 µs) | 5 A - withstands lightning-induced surges per IEC 61000-4-5 Class III |
| Operating Temperature Range | -40°C to +150°C - supports automotive cabin and industrial ambient environments |
Pinout & Package
SOT-23-3 package with gull-wing leads, 1.3 mm × 2.9 mm footprint, 1.1 mm height, and RoHS-compliant green construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | I/O Line 1 | Bidirectionally protected signal terminal; connects to first data line (e.g., USB D+) |
| 2 | Common Cathode | Shared reference node for both TVS elements; must be tied to system ground or local return plane |
| 3 | I/O Line 2 | Bidirectionally protected signal terminal; connects to second data line (e.g., USB D-) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-line bidirectional ESD protection | Single SOT-23 device protects two independent I/O paths without external routing or polarity concerns |
| Low clamping voltage (24.0 V max @ 10 A) | Ensures downstream 12 V logic or interface ICs remain within safe operating voltage during surge events |
| 12.5 pF typical junction capacitance | Minimizes signal distortion on high-speed lines such as USB 2.0 or SDIO interfaces |
| IEC 61000-4-4 EFT immunity (±40 A) | Protects against fast transient bursts induced on cables or PCB traces in industrial control panels |
| Green RoHS-compliant packaging | Meets environmental regulations for consumer electronics and medical portable devices |
Applications
| USB 2.0 Port Protection | Keypad/Button ESD Guard |
|---|---|
Use Scenario: Protecting D+/D− lines of USB 2.0 ports in portable GPS units against user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient voltage to ≤24 V during ±30 kV contact discharge. Use Value: Prevents latch-up or gate oxide damage in USB transceivers while maintaining <13 pF loading for full-speed signaling. | Use Scenario: Shielding membrane keypad matrix lines in notebook computers from repeated finger-touch ESD events. IC Role / Device Role / Timing Role: Low-capacitance dual-path suppressor absorbing ±30 kV air discharge without signal delay. Use Value: Eliminates false keypresses and microcontroller resets caused by ESD coupling into scan lines. |
| Digital Camera Interface Lines | Industrial Sensor Data Links |
Use Scenario: Safeguarding MIPI CSI-2 clock/data pairs in compact digital cameras exposed to field service handling. IC Role / Device Role / Timing Role: Symmetrical clamping element preserving differential timing margins under 8/20 µs surge stress. Use Value: Maintains signal fidelity with ≤12.5 pF loading and sub-25 V clamping to avoid receiver input overvoltage. | Use Scenario: Protecting RS-485 or CAN FD data lines in factory automation sensors subjected to cable-coupled EFT. IC Role / Device Role / Timing Role: Dual-line TVS providing ±40 A EFT burst suppression and 5 A lightning surge handling. Use Value: Enables uninterrupted communication during ±40 A transient events without bus lockup or node reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Single-line unidirectional; higher VRWM (12 V), but requires separate devices per line and external polarity management | Lacks integrated dual-line topology; increases PCB area and routing complexity | Use only when discrete layout and polarity-aware design are acceptable |
| TPD2E001DRSR | Two-line bidirectional; lower VRWM (5 V), 12 pF capacitance, rated for ±8 kV IEC 61000-4-2 only | Not suitable for 12 V systems; limited to 5 V logic interfaces like I²C or GPIO | Select only for low-voltage, non-lightning-survivable applications requiring ultra-low capacitance |
Compared with SMAJ12A and TPD2E001DRSR, the AOZ8212BCI-12 uniquely delivers dual-line bidirectional protection at 12 V with ±30 kV ESD rating and 5 A lightning surge capability in a space-saving SOT-23 package-enabling single-component safeguarding of paired signals without polarity constraints or voltage derating.
Availability
AOZ8212BCI-12 is available at Aetrix Electronics and suitable for portable GPS units, notebook computer keypads, digital camera interfaces, and industrial sensor data links requiring stable component supply and consistent ESD performance across production batches.
Supply support for AOZ8212BCI-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 AOZ8212BCI series targets compact, high-reliability ESD protection for dual-line interfaces in portable and industrial electronics, emphasizing low capacitance, high surge tolerance, and minimal PCB footprint.
FAQ
What is the working peak reverse voltage of the AOZ8212BCI-12?
The AOZ8212BCI-12 has a working peak reverse voltage (VRWM) of 12.0 V, meaning it remains non-conductive under normal 12 V DC or AC signal conditions while clamping transients above its breakdown threshold. This rating ensures compatibility with standard 12 V interface rails and prevents leakage or false triggering during steady-state operation. The AOZ8212BCI-12 maintains this specification across its full operating temperature range.
Does the AOZ8212BCI-12 meet IEC 61000-4-2 Level 4 ESD requirements?
Yes, the AOZ8212BCI-12 exceeds IEC 61000-4-2 Level 4 with ±30 kV air and ±30 kV contact discharge ratings, significantly surpassing the standard's minimum of ±15 kV air and ±8 kV contact. This margin allows robust protection in harsh handling environments such as retail kiosks or field-deployed portable GPS units. The AOZ8212BCI-12 achieves this using symmetric internal TVS structures optimized for bidirectional clamping.
What is the maximum clamping voltage of the AOZ8212BCI-12 during a 10 A surge?
The AOZ8212BCI-12 exhibits a maximum clamping voltage (VCL) of 24.0 V when subjected to a 10 A, 8/20 µs transient pulse. This value represents the peak voltage imposed on protected circuitry during worst-case surge conditions and ensures downstream 12 V logic components remain within absolute maximum ratings. The AOZ8212BCI-12 achieves this clamping performance while sustaining 100 W peak pulse power.
Can the AOZ8212BCI-12 be used for protecting USB 2.0 differential pairs?
Yes, the AOZ8212BCI-12 is suitable for USB 2.0 D+/D− line protection due to its 12.5 pF typical junction capacitance, bidirectional symmetry, and 24.0 V clamping voltage-preserving signal integrity up to 480 Mbps. Its SOT-23 footprint allows placement directly at the connector, minimizing stub length. The AOZ8212BCI-12 has been validated in USB 2.0 applications including portable GPS and digital cameras.
What is the junction capacitance of the AOZ8212BCI-12 at 0 V bias and 1 MHz?
The AOZ8212BCI-12 has a typical junction capacitance of 12.5 pF and a maximum of 15.0 pF at 0 V bias and 1 MHz, measured per manufacturer test conditions. This low capacitance minimizes signal attenuation and timing skew on high-speed lines such as I²C, SPI, or USB 2.0. The AOZ8212BCI-12 maintains this capacitance stability across temperature and voltage, supporting reliable performance in portable electronics.
AOZ8212BCI-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 10pF @ 1MHz
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AOZ8212BCI-12 FAQ
1.How can I place an order for AOZ8212BCI-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8212BCI-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 AOZ8212BCI-12 reliable?
The price and inventory of AOZ8212BCI-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8212BCI-12 is usually 5 days.
3.What payment methods are accepted for AOZ8212BCI-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8212BCI-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8212BCI-12?
AOZ8212BCI-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8212BCI-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 AOZ8212BCI-12?
For technical support, including AOZ8212BCI-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8212BCI-12 requirements.
6.How does Aetrix verify that AOZ8212BCI-12 is sourced from the original manufacturer or authorized distributors?
All AOZ8212BCI-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 AOZ8212BCI-12 meets industry standards.
7.What is the process for return or replacement of AOZ8212BCI-12?
All AOZ8212BCI-12 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8212BCI-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 AOZ8212BCI-12 part is unused and in its original packaging.
Return procedure for AOZ8212BCI-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8212BCI-12 Tags
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