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Alpha & Omega Semiconductor Inc. AOZ8211DI-24
- Part No.:
- AOZ8211DI-24
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
AOZ8211DI-24.pdf
- Description:
- TVS DIODE 24VWM 37VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,171
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Product details
Overview
AOZ8211DI-24 from Alpha and Omega Semiconductor is a unidirectional single-line TVS diode designed for ESD and transient protection of 24 V signal lines in space-constrained portable electronics. It features a working peak reverse voltage of 24.0 V, clamping voltage of 33.0 V at 1 A IPP, ±15 kV air/±18 kV contact IEC 61000-4-2 ESD rating, 0.1 µA max reverse leakage, and 20 pF typical capacitance at 0 V - enabling robust protection without signal integrity degradation in high-speed data interfaces.
For engineers reviewing the AOZ8211DI-24 datasheet, pinout, applications, or equivalent options, key selection considerations include its 24 V operating voltage rating, low 33 V clamping at 1 A, ultra-small DFN 1.0 × 0.6 mm footprint, unidirectional polarity, and suitability for USB, HDMI, and industrial I/O line protection where board area and low capacitance are critical.
Technical Context
The AOZ8211DI-24 operates as a unidirectional avalanche breakdown TVS diode with a 24.0 V VRWM and 27.0 V minimum breakdown voltage at 1 mA test current. Its clamping behavior is characterized across 1–12 A peak pulse currents, delivering 33.0 V (1 A), 36.0 V (5 A), and 37.0 V (12 A) maximum clamping voltages under 8/20 µs waveform conditions.
It exhibits 20 pF junction capacitance at 0 V bias and 1 MHz, low forward voltage (0.75 V typ. @ 10 mA), and supports operation from –40 °C to +85 °C ambient. The device meets IEC 61000-4-2 Level 4 (±15 kV air / ±18 kV contact) and HBM ±30 kV, targeting high-reliability interface protection without compromising signal fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24.0 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line voltage. |
| VBR (min) | 27.0 V @ 1 mA - Ensures reliable avalanche conduction onset above normal operating voltage margin. |
| VCL @ 1 A | 33.0 V - Clamping voltage during 1 A transient; defines worst-case overvoltage seen by downstream IC. |
| CJ | 20 pF @ 0 V, 1 MHz - Low capacitance minimizes insertion loss and signal distortion on high-speed lines. |
| ESD Rating | ±15 kV air / ±18 kV contact per IEC 61000-4-2 - Validates compliance with industrial and consumer ESD immunity requirements. |
| IPP (8/20 µs) | 2.5 A - Peak surge current handling capability; determines survivability against moderate transients. |
| Package | DFN 1.0 × 0.6 × 0.5 mm - Enables placement on dense PCBs near connectors or IC pins without consuming valuable real estate. |
Pinout & Package
AOZ8211DI-24 uses a 2-pin DFN (Dual Flat No-lead) package measuring 1.0 mm × 0.6 mm × 0.5 mm, with exposed thermal pad (non-electrical). Pin 1 is Anode; Pin 2 is Cathode. Polarity is unidirectional, requiring correct orientation relative to protected signal line and ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Input signal connection | Connected to protected line (e.g., USB D+, HDMI TMDS); conducts to cathode when transient exceeds VRWM. |
| 2 (Cathode) | Ground reference terminal | Must be tied directly to low-inductance system ground plane to ensure effective transient shunting. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional ESD protection | Enables integration on positive-rail signal lines (e.g., 24 V sensor outputs) without reverse-bias leakage concerns. |
| Low 33 V clamping at 1 A | Keeps protected ICs within safe voltage margins during common ESD events, reducing risk of latch-up or damage. |
| 20 pF junction capacitance | Preserves signal integrity on 100+ Mbps interfaces such as RS-485, CAN FD, or industrial Ethernet PHY lines. |
| RoHS-compliant DFN package | Supports lead-free reflow assembly and meets environmental compliance mandates for global electronics manufacturing. |
Applications
| Industrial Sensor Interfaces | Automotive Body Control Modules |
|---|---|
Use Scenario: Protecting 24 V analog output lines from ESD during field wiring or connector mating in factory automation sensors. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and microcontroller ADC input. Use Value: Prevents ADC saturation or damage from ±15 kV air discharge while maintaining <0.1% gain error due to 20 pF loading. | Use Scenario: Shielding LIN bus or 24 V switch inputs in door module ECUs from ESD during service or environmental exposure. IC Role / Device Role / Timing Role: Point-of-entry protection on 24 V supply-coupled control lines before local LDO regulation. Use Value: Sustains system uptime by absorbing ±18 kV contact discharge without triggering reset or brownout in safety-critical modules. |
| Medical Portable Monitors | Ruggedized Handheld Terminals |
Use Scenario: Guarding 24 V power rails feeding display backlight drivers or touch controller I²C lines in battery-powered diagnostic devices. IC Role / Device Role / Timing Role: Primary ESD barrier on mainboard power distribution net adjacent to external ports. Use Value: Eliminates need for secondary filtering components thanks to 33 V clamping and 0.1 µA leakage at 24 V. | Use Scenario: Securing 24 V auxiliary power inputs and serial communication lines in warehouse scanners subjected to frequent static discharge. IC Role / Device Role / Timing Role: Discrete TVS element mounted directly at connector footprint to minimize inductance path to ground. Use Value: Achieves IEC 61000-4-2 Level 4 compliance in compact form factor without sacrificing mechanical durability or thermal performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | DO-214AC package (4.5 × 2.7 mm); 38.9 V VCL @ 1 A; 100 pF CJ; 27.8 V VBR min | Larger footprint; higher clamping and capacitance; suited for lower-frequency, higher-power industrial mains protection | Select SMAJ24A only when PCB space allows larger package and higher clamping voltage is acceptable for legacy designs. |
| TPD2E001DRYR | 2-channel bidirectional array in DRY (1.6 × 1.6 mm); 12 pF CJ per channel; 12 V VRWM; not rated for 24 V operation | Not voltage-compatible with 24 V lines; intended for dual 3.3/5 V data lines like USB 2.0 | TPD2E001DRYR is unsuitable for AOZ8211DI-24's 24 V use case but may serve as alternative for multi-line 5 V interfaces where space permits dual-channel integration. |
Compared with SMAJ24A and TPD2E001DRYR, AOZ8211DI-24 delivers optimal trade-off of 24 V compatibility, ultra-low 20 pF capacitance, and minimal 1.0 × 0.6 mm footprint - making it uniquely suitable for modern compact 24 V interface protection where signal integrity and board area are constrained.
Availability
AOZ8211DI-24 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, medical portable monitors, and ruggedized handheld terminals requiring stable component supply and guaranteed RoHS-compliant sourcing.
Supply support for AOZ8211DI-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.
The AOZ8211DI family was developed to deliver ultra-compact, high-performance ESD protection for voltage-sensitive signal lines across consumer, industrial, and automotive electronics - with variants optimized for 2.5 V to 24 V operating rails.
FAQ
What is the maximum clamping voltage of AOZ8211DI-24 under ESD stress?
The AOZ8211DI-24 has a maximum clamping voltage of 33.0 V at 1 A peak pulse current (8/20 µs waveform), rising to 36.0 V at 5 A and 37.0 V at 12 A. This ensures protected circuits remain below critical overvoltage thresholds during standardized IEC 61000-4-2 ESD events. The clamping performance is validated per datasheet Rev. 5.0 and applies specifically to the AOZ8211DI-24 variant.
Does AOZ8211DI-24 support bidirectional protection?
No, AOZ8211DI-24 is a unidirectional TVS diode, configured for protection of positive-rail signal lines referenced to ground. Its anode connects to the protected line and cathode to ground. For bidirectional protection, AOS offers other variants like AOZ8211DI-02 or AOZ8211DI-03 - but AOZ8211DI-24 is strictly unidirectional and must be oriented correctly in-circuit to function.
What is the junction capacitance of AOZ8211DI-24 and why does it matter?
The AOZ8211DI-24 has a typical junction capacitance of 20 pF at 0 V bias and 1 MHz. This low value minimizes signal attenuation and timing skew on high-speed lines such as RS-485, CAN FD, or industrial Ethernet PHY interfaces. High capacitance would degrade rise/fall times and increase bit error rates - making the 20 pF spec critical for maintaining data integrity in 24 V communication links.
Can AOZ8211DI-24 replace AOZ8211DI-12 in a 24 V circuit?
No - AOZ8211DI-12 is rated for 12 V VRWM and will enter conduction during normal 24 V operation, causing excessive leakage and potential failure. AOZ8211DI-24 is specifically engineered for 24 V systems with 24.0 V VRWM and 27.0 V VBR min. Substituting AOZ8211DI-12 risks continuous conduction, thermal runaway, and loss of protection. Always match VRWM to the protected line's steady-state voltage.
Is AOZ8211DI-24 compliant with RoHS and halogen-free standards?
Yes, AOZ8211DI-24 is both RoHS compliant and part of AOS Green Products, featuring reduced halogen content per AOS Green Policy. The DFN 1.0 × 0.6 mm package meets JEDEC standards for lead-free reflow and is qualified for industrial temperature range (–40 °C to +85 °C). Full compliance documentation is available via AOS' media portal referenced in the AOZ8211DI datasheet Rev. 5.0.
AOZ8211DI-24 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):
- 24V (Max)
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 37V
- Current - Peak Pulse (10/1000µs):
- 2.5A (8/20µs)
- Power - Peak Pulse:
- 110W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 20pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1x0.6)
AOZ8211DI-24 FAQ
1.How can I place an order for AOZ8211DI-24 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8211DI-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 AOZ8211DI-24 reliable?
The price and inventory of AOZ8211DI-24 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8211DI-24 is usually 5 days.
3.What payment methods are accepted for AOZ8211DI-24?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8211DI-24 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8211DI-24?
AOZ8211DI-24 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8211DI-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 AOZ8211DI-24?
For technical support, including AOZ8211DI-24 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8211DI-24 requirements.
6.How does Aetrix verify that AOZ8211DI-24 is sourced from the original manufacturer or authorized distributors?
All AOZ8211DI-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 AOZ8211DI-24 meets industry standards.
7.What is the process for return or replacement of AOZ8211DI-24?
All AOZ8211DI-24 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8211DI-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 AOZ8211DI-24 part is unused and in its original packaging.
Return procedure for AOZ8211DI-24:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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