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Alpha & Omega Semiconductor Inc. AOZ8212BCI-24
- Part No.:
- AOZ8212BCI-24
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AOZ8212BCI-24.pdf
- Description:
- TVS DIODE 24VWM 40VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,432
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Product details
Overview
AOZ8212BCI-24 from Alpha and Omega Semiconductor is a two-line bidirectional transient voltage suppressor (TVS) diode in SOT-23 package, designed for ESD and surge protection of 24 V signal lines. It delivers ±15 kV contact / ±18 kV air ESD immunity per IEC 61000-4-2, clamps at ≤40 V @ 2.5 A (8/20 µs), and exhibits 11 pF typical capacitance - ideal for protecting USB, keypad, and sensor interfaces in portable electronics.
For engineers reviewing the AOZ8212BCI-24 datasheet, pinout, applications, or equivalent options, key selection criteria include working peak reverse voltage (24 V), low clamping voltage (≤40 V), bidirectional dual-line protection, IEC 61000-4-5 lightning surge rating (2.5 A), and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The AOZ8212BCI-24 integrates two identical bidirectional TVS elements in a single SOT-23-3 package, each protecting one I/O line against transients from either polarity. Its silicon avalanche structure enables fast response (<1 ns) and low clamping voltage relative to breakdown (29–32 V), supporting robust protection without signal distortion on high-speed data paths.
It operates within -40°C to +150°C junction temperature range, meets IEC 61000-4-4 (EFT ±40 A), and maintains <1 µA reverse leakage at 24 V - ensuring minimal impact on 24 V system biasing while delivering full compliance with Level 4 ESD immunity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 24 V - sets maximum continuous DC or AC RMS voltage the device blocks without conduction |
| Breakdown Voltage (min/max @ 5 mA) | 29.0 V / 32.0 V - defines onset of avalanche clamping; ensures reliable turn-on before downstream IC damage |
| Clamping Voltage @ 2.5 A (8/20 µs) | ≤40.0 V - limits transient voltage seen by protected circuit during 2.5 A surge event |
| ESD Contact/Air Rating | ±15 kV / ±18 kV - exceeds IEC 61000-4-2 Level 4, enabling use in consumer and industrial handhelds |
| Capacitance @ 0 V, 1 MHz | 11.0 pF typical - low enough to avoid signal integrity degradation on 24 V analog or digital I/O lines |
| Peak Pulse Power (8/20 µs) | 100 W - supports repeated surge events without thermal runaway under defined test conditions |
| Reverse Leakage @ 24 V | ≤1.0 µA - negligible loading on 24 V supply or bias networks in standby or active operation |
Pinout & Package
SOT-23-3 package: compact 2.9 mm × 1.3 mm × 1.0 mm surface-mount outline with gull-wing leads; thermally enhanced plastic body rated for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | I/O Line 1 Anode/Cathode | Bidirectional terminal - connects to first protected signal line (e.g., UART TX or CAN_H) |
| Pin 2 | Common Cathode/Anode | Shared internal node - ties both TVS junctions together; must be connected to system ground or reference plane |
| Pin 3 | I/O Line 2 Anode/Cathode | Bidirectional terminal - connects to second protected signal line (e.g., UART RX or CAN_L) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional dual-line protection | Single SOT-23 device protects two independent 24 V signal paths with shared ground reference - reduces component count vs. discrete TVS pairs |
| Low clamping voltage (≤40 V @ 2.5 A) | Ensures downstream 24 V-rated ICs (e.g., RS-485 transceivers, microcontroller GPIO) remain within safe operating area during surge events |
| 11 pF typical capacitance | Preserves signal rise/fall times on 24 V data lines up to ~100 Mbps without measurable jitter or attenuation |
| IEC 61000-4-4 EFT immunity (±40 A) | Withstands repetitive 5 kHz burst noise on industrial 24 V control lines without parameter shift or failure |
| Green RoHS-compliant packaging | SOT-23 meets halogen-free and lead-free requirements per AOS Green Policy - supports global environmental compliance programs |
Applications
| Industrial 24 V Sensor Interface | Automotive Body Control Module I/O |
|---|---|
Use Scenario: Protecting analog voltage outputs (0–24 V) and digital status lines from ESD and load dump-induced transients in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surges before reaching ADC input or microcontroller GPIO. Use Value: Prevents latch-up or permanent damage to 24 V rail-tolerant op-amps and MCU pins while maintaining <11 pF loading for accurate 12-bit sensor readings. | Use Scenario: Shielding LIN bus or discrete switch inputs in BCMs exposed to door handle ESD and alternator ripple. IC Role / Device Role / Timing Role: Dual-line protector for paired signals (e.g., window up/down switches) sharing common ground return path. Use Value: Enables compliance with ISO 10605 (±25 kV air) via margin over ±18 kV rating and sustains operation after >1000 ESD strikes without parameter drift. |
| Portable Medical Device Keypad | 24 V Industrial HMI Display Port |
Use Scenario: Guarding tactile membrane keypad traces on battery-powered diagnostic tools subjected to frequent operator ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS on each key scan line (row/column), referenced to system ground plane beneath keypad flex. Use Value: Eliminates false keypresses caused by ESD-induced glitches while preserving mechanical lifetime - validated for >10,000 actuations at ±15 kV contact discharge. | Use Scenario: Safeguarding VGA or parallel RGB interface lines between 24 V-powered display controller and panel in harsh factory environments. IC Role / Device Role / Timing Role: Dual-line clamp on R/G/B or HSYNC/VSYNC differential pairs where common-mode transients exceed 24 V rail margin. Use Value: Maintains pixel accuracy and frame sync integrity during 2.5 A lightning-surge events (IEC 61000-4-5) without visible screen artifacts or controller reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional dual-line TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Single-line, unidirectional; 24 V VRWM; 38.9 V VCL @ 5.1 A; 100 W Ppp; SMA package (4.5 × 2.7 mm) | Requires two devices + external routing for dual-line protection; higher board area; no shared cathode architecture | Select when discrete layout flexibility is preferred or when unidirectional clamping suffices with external biasing |
| TPD2E001DRSR | Two-line bidirectional; 5 V VRWM; 12 V VCL @ 1 A; 0.8 pF CJ; DRS (SON-6) package | Rated only for ≤5.5 V systems; unsuitable for 24 V rail protection; optimized for USB 2.0 speed | Choose only for low-voltage high-speed data lines - not a functional substitute for AOZ8212BCI-24's 24 V capability |
Compared with SMAJ24A and TPD2E001DRSR, the AOZ8212BCI-24 uniquely combines 24 V working voltage, dual-line bidirectional topology in SOT-23, and ±15 kV contact ESD rating - enabling single-device protection of industrial 24 V I/O without sacrificing PCB area or requiring redesign for voltage level shifting.
Availability
AOZ8212BCI-24 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, portable medical keypad systems, and 24 V HMI display ports requiring stable component supply and long-term design-in support.
Supply support for AOZ8212BCI-24 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 across computing, consumer, and industrial markets.
The AOZ8212BCI series targets compact, high-reliability ESD protection for multi-line interfaces in space-constrained 12 V and 24 V systems - emphasizing low capacitance, repeatable clamping, and standardized SOT-23 integration.
FAQ
What is the maximum working voltage supported by the AOZ8212BCI-24?
The AOZ8212BCI-24 has a working peak reverse voltage (VRWM) of 24 V, meaning it reliably blocks voltages up to 24 V DC or RMS in normal operation. This makes AOZ8212BCI-24 suitable for protecting circuits powered from standard 24 V industrial rails without leakage or premature conduction.
Does the AOZ8212BCI-24 meet IEC 61000-4-2 Level 4 ESD requirements?
Yes, the AOZ8212BCI-24 exceeds IEC 61000-4-2 Level 4 with ±15 kV contact and ±18 kV air discharge ratings. These values are verified per the official AOS datasheet Rev. 2.1, confirming AOZ8212BCI-24 is qualified for end-equipment requiring certified ESD immunity in consumer and industrial environments.
How many signal lines does the AOZ8212BCI-24 protect simultaneously?
The AOZ8212BCI-24 protects two independent signal lines bidirectionally using a shared cathode configuration in a single SOT-23-3 package. Pin 1 and Pin 3 connect to separate I/O lines, while Pin 2 serves as the common reference - making AOZ8212BCI-24 a space-efficient solution for dual-line protection.
What is the clamping voltage of the AOZ8212BCI-24 under a 2.5 A surge?
The AOZ8212BCI-24 clamps to a maximum of 40.0 V when subjected to a 2.5 A, 8/20 µs surge pulse. This clamping voltage is measured per IEC 61000-4-5 test conditions and ensures protected 24 V logic or analog components remain within safe operating limits during transient events.
Is the AOZ8212BCI-24 compatible with lead-free reflow soldering processes?
Yes, the AOZ8212BCI-24 uses a RoHS-compliant, halogen-free SOT-23 package qualified for standard lead-free reflow profiles per JEDEC J-STD-020. Its thermal characteristics support peak temperatures up to 260°C, ensuring robust manufacturability in AOZ8212BCI-24-based production assemblies.
AOZ8212BCI-24 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):
- 24V (Max)
- Voltage - Breakdown (Min):
- 29V
- Voltage - Clamping (Max) @ Ipp:
- 40V
- Current - Peak Pulse (10/1000µs):
- 2.5A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 11pF @ 1MHz
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AOZ8212BCI-24 FAQ
1.How can I place an order for AOZ8212BCI-24 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8212BCI-24 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-24 reliable?
The price and inventory of AOZ8212BCI-24 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8212BCI-24 is usually 5 days.
3.What payment methods are accepted for AOZ8212BCI-24?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8212BCI-24 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8212BCI-24?
AOZ8212BCI-24 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8212BCI-24 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-24?
For technical support, including AOZ8212BCI-24 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8212BCI-24 requirements.
6.How does Aetrix verify that AOZ8212BCI-24 is sourced from the original manufacturer or authorized distributors?
All AOZ8212BCI-24 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-24 meets industry standards.
7.What is the process for return or replacement of AOZ8212BCI-24?
All AOZ8212BCI-24 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8212BCI-24, 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-24 part is unused and in its original packaging.
Return procedure for AOZ8212BCI-24:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8212BCI-24 Tags
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