My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOZ8212CI-12
- Part No.:
- AOZ8212CI-12
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AOZ8212CI-12.pdf
- Description:
- TVS DIODE 12VWM 24VC SOT23A-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,740
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOZ8212CI-12 from Alpha & Omega Semiconductor is a two-line bidirectional TVS diode in SOT-23A package, rated for 12 V working peak reverse voltage (VRWM), 24 V minimum breakdown voltage (VBR), and 5 A peak pulse current (IPP) under 8/20 µs waveform. It provides ±30 kV ESD protection per IEC 61000-4-2 (contact/air), clamps to ≤24 V at 10 A, and operates across –40 °C to +85 °C ambient. It protects high-speed data lines in portable electronics against transients and ESD.
For engineers reviewing the AOZ8212CI-12 datasheet, pinout, applications, or equivalent options, key selection criteria include its 12 V VRWM rating, bidirectional dual-line configuration, 24 V clamping voltage at 10 A, 12.5 pF typical capacitance at 0 V, and compliance with IEC 61000-4-2 Level 4 and IEC 61000-4-5 (5 A lightning surge).
Technical Context
The AOZ8212CI-12 integrates two identical bidirectional TVS diodes in a single SOT-23A package, enabling simultaneous protection of two independent signal lines without polarity constraints. Its silicon avalanche structure delivers fast response (<1 ns) to ESD events and low clamping voltage relative to VRWM.
It supports IEC 61000-4-4 (EFT) immunity up to ±40 A and meets IEC 61000-4-5 with 5 A (8/20 µs) surge capability. The device exhibits 10.0 pF maximum capacitance at 0 V and 1 MHz, ensuring minimal signal distortion on high-speed interfaces such as USB 2.0 or audio lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 12 V - Maximum continuous reverse operating voltage before conduction begins; defines safe signal swing range for protected lines. |
| VBR (min @ 5 mA) | 15.0 V - Minimum breakdown voltage ensures reliable triggering above normal operating voltage, preventing false clamping. |
| VCL (max @ 10 A) | 24.0 V - Clamping voltage limits transient overvoltage seen by downstream ICs during 8/20 µs surges. |
| IPP (8/20 µs) | 5 A - Peak surge current handling capacity for lightning-level transients per IEC 61000-4-5. |
| CJ (typ @ 0 V, 1 MHz) | 12.5 pF - Low junction capacitance minimizes insertion loss and signal integrity impact on data lines up to ~100 MHz. |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact / ±30 kV air - Exceeds Level 4 immunity requirements, enabling robust handheld device certification. |
| Operating Temp Range | –40 °C to +85 °C - Validated performance across industrial and consumer ambient conditions without derating. |
Pinout & Package
SOT-23A package: 3-pin surface-mount, JEDEC TO-236HAA compliant, body dimensions 2.90 mm × 1.30 mm × 0.95 mm (L × W × H), with gull-wing leads and 0.95 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | I/O1 Anode/Cathode | Bidirectional terminal for first protected line; connects to signal path requiring ESD suppression. |
| 2 | Common Cathode/Anode | Shared center terminal forming back-to-back diode pair; establishes symmetrical clamping for both directions. |
| 3 | I/O2 Anode/Cathode | Bidirectional terminal for second protected line; enables dual-line protection with single-component footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional dual-line protection | Single SOT-23A device protects two independent signal paths with matched clamping characteristics and no polarity dependency. |
| Low clamping voltage (24 V @ 10 A) | Ensures downstream 12 V-rated ICs remain within absolute maximum ratings during surge events. |
| 12.5 pF typical capacitance | Preserves signal integrity on high-speed interfaces like keypad scan lines or camera data buses without added termination. |
| IEC 61000-4-4 EFT immunity (±40 A) | Withstands repetitive electrical fast transients common in industrial environments and switch-mode power supply noise coupling. |
| Green RoHS-compliant packaging | SOT-23A package uses halogen-reduced materials and meets EU RoHS Directive 2011/65/EU requirements. |
Applications
| Portable GPS Receivers | Digital Camera Interfaces |
|---|---|
Use Scenario: Protecting UART, I²C, or SPI communication lines between GPS baseband IC and host MCU from ESD during user handling and antenna coupling. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed directly at connector or IC pad to clamp fast-rising ESD pulses before they reach sensitive logic inputs. Use Value: Prevents latch-up or permanent damage in GPS modules exposed to ±30 kV contact discharge, maintaining position lock and NMEA output reliability. | Use Scenario: Shielding image sensor data lanes (e.g., MIPI CSI-2 clock/data pairs) from ESD induced by lens rotation or SD card insertion. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to sensor connector to suppress transients while preserving signal rise/fall times. Use Value: Enables clean image capture without frame corruption or sensor reset, validated by <12.5 pF loading on 100 MHz+ video signals. |
| Notebook Computer Keypads | MP3 Player Button Arrays |
Use Scenario: Guarding mechanical keypad scan matrix lines against ESD from finger touch in clamshell hinge zones where PCB flex increases coupling risk. IC Role / Device Role / Timing Role: Dual-line TVS deployed per row/column pair to eliminate need for discrete diodes on each trace. Use Value: Reduces BOM count by 50% versus single-line TVS solutions while maintaining ±30 kV system-level ESD pass rate. | Use Scenario: Securing tactile button inputs (play/pause/volume) connected to audio SoC GPIOs against repeated human-body ESD events. IC Role / Device Role / Timing Role: Bidirectional clamp absorbing HBM ±30 kV discharges before reaching input protection diodes inside the SoC. Use Value: Eliminates field failures due to button-induced ESD stress, extending product lifetime beyond 100,000 actuations. |
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 | Unidirectional, DO-214AC package (4.5 mm × 3.9 mm), 12 V VRWM, 19.9 V VBR min, 19.9 V clamping @ 10.1 A, 1000 W peak power. | Requires two devices for dual-line protection; larger footprint; higher clamping voltage reduces margin for 12 V systems. | Select when higher surge power (1000 W vs. 100 W) is required and board space allows DO-214AC placement. |
| TPD2E001DRSR | Two-channel bidirectional TVS in UQFN-6 (1.5 mm × 1.5 mm), 5 V VRWM, 10 pF typical capacitance, ±8 kV IEC 61000-4-2 contact rating. | Lower VRWM restricts use to 5 V logic; smaller package but lower ESD rating limits suitability for ruggedized consumer devices. | Select for space-constrained 5 V applications where ±8 kV ESD suffices and ultra-low capacitance is critical. |
Compared with SMAJ12A and TPD2E001DRSR, the AOZ8212CI-12 uniquely balances 12 V operation, ±30 kV ESD immunity, dual-line integration in SOT-23A, and 12.5 pF capacitance-making it optimal for cost-sensitive, space-limited 12 V portable designs needing full IEC Level 4 compliance.
Availability
AOZ8212CI-12 is available at Aetrix Electronics and suitable for portable GPS receivers, digital camera interfaces, and notebook computer keypads requiring stable component supply with guaranteed RoHS/Green compliance and full traceability.
Supply support for AOZ8212CI-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 & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.
The AOZ8212 family targets compact, high-reliability ESD protection in portable electronics, emphasizing low capacitance, bidirectional dual-line integration, and full IEC 61000-4-2/4-5 compliance in minimal footprints.
FAQ
What is the working peak reverse voltage (VRWM) of the AOZ8212CI-12?
The AOZ8212CI-12 has a VRWM of 12 V, meaning it remains non-conductive up to this DC or continuous AC reverse voltage. This rating ensures compatibility with standard 12 V signal rails while providing sufficient margin above typical logic levels. Operation above 12 V triggers avalanche conduction to clamp transients, protecting downstream circuitry without interfering with normal function.
Does the AOZ8212CI-12 support bidirectional protection on both lines simultaneously?
Yes, the AOZ8212CI-12 implements two back-to-back TVS diodes sharing a common center terminal (Pin 2), enabling true bidirectional clamping on both I/O1 (Pin 1) and I/O2 (Pin 3). This architecture allows symmetric suppression of positive and negative transients on either line independently, eliminating polarity concerns during layout and simplifying design for differential or single-ended interfaces.
What is the maximum clamping voltage of the AOZ8212CI-12 under surge conditions?
The AOZ8212CI-12 specifies a maximum clamping voltage (VCL) of 24.0 V at 10 A (8/20 µs waveform). This value represents the peak voltage imposed on protected lines during worst-case lightning-surge events. Its 24 V clamping level provides safe headroom for 12 V systems, ensuring connected ICs stay within their absolute maximum ratings even under full-rated surge stress.
How does the AOZ8212CI-12 meet IEC 61000-4-2 ESD requirements?
The AOZ8212CI-12 exceeds IEC 61000-4-2 Level 4 with ±30 kV air discharge and ±30 kV contact discharge ratings. These values were verified using standardized test setups (150 pF capacitor, 330 Ω discharge resistor). The device's low dynamic impedance and sub-nanosecond response time enable rapid energy diversion, preventing ESD-induced latch-up or gate oxide damage in sensitive interface ICs.
What package type is used for the AOZ8212CI-12 and what are its key mechanical features?
The AOZ8212CI-12 uses the SOT-23A package-a JEDEC TO-236HAA compliant 3-pin surface-mount outline measuring 2.90 mm × 1.30 mm × 0.95 mm. Key features include gull-wing leads with 0.95 mm pitch, mold compound meeting halogen-free and RoHS requirements, and a land pattern optimized for automated reflow assembly and thermal reliability in high-volume portable manufacturing.
AOZ8212CI-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 15V
- 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 ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23A-3
AOZ8212CI-12 FAQ
1.How can I place an order for AOZ8212CI-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8212CI-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 AOZ8212CI-12 reliable?
The price and inventory of AOZ8212CI-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8212CI-12 is usually 5 days.
3.What payment methods are accepted for AOZ8212CI-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8212CI-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8212CI-12?
AOZ8212CI-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8212CI-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 AOZ8212CI-12?
For technical support, including AOZ8212CI-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8212CI-12 requirements.
6.How does Aetrix verify that AOZ8212CI-12 is sourced from the original manufacturer or authorized distributors?
All AOZ8212CI-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 AOZ8212CI-12 meets industry standards.
7.What is the process for return or replacement of AOZ8212CI-12?
All AOZ8212CI-12 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8212CI-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 AOZ8212CI-12 part is unused and in its original packaging.
Return procedure for AOZ8212CI-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8212CI-12 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
