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Alpha & Omega Semiconductor Inc. AOZ8851ADI-05
- Part No.:
- AOZ8851ADI-05
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
AOZ8851ADI-05.pdf
- Description:
- TVS DIODE 5VWM 28VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,229
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Product details
Overview
AOZ8851ADI-05 from Alpha and Omega Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in a 0201 package, designed for ESD protection of 5 V high-speed data lines. It delivers ±20 kV IEC 61000-4-2 contact/air discharge immunity, 0.22 pF typical junction capacitance at 1 MHz, 5 V reverse working voltage, and clamps to ≤13 V at 4 A (8/20 µs), enabling robust protection in space-constrained portable electronics.
For engineers reviewing the AOZ8851ADI-05 datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low capacitance for signal integrity, low clamping voltage for downstream IC safety, RoHS-compliant 0201 footprint compatibility, and verified IEC 61000-4-2 Level 4+ performance on 5 V interfaces such as USB 2.0, HDMI DDC, and I²C buses.
Technical Context
The AOZ8851ADI-05 implements a symmetric bidirectional avalanche structure optimized for low-capacitance transient suppression on single-ended 5 V signal lines. Its 0.22 pF capacitance at 1 MHz and <0.5 Ω dynamic resistance ensure minimal signal distortion up to GHz frequencies while maintaining fast response to ESD events.
It operates across –40 °C to +125 °C ambient, with reverse working voltage (VRWM) fixed at 5 V and breakdown voltage (VBR) ≥6.5 V at 1 mA. Clamping is specified for both 100 ns TLP (±16 A to ±30 A) and 8/20 µs surge (IPP = ±4 A), supporting compliance with IEC 61000-4-2 and IEC 61000-4-5 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage | 5 V - Maximum continuous DC or peak AC voltage the device blocks without conduction. |
| Junction Capacitance | 0.22 pF (typ, 1 MHz) - Enables use on >500 Mbps data lines (e.g., USB 2.0) without measurable signal attenuation. |
| ESD Rating (IEC 61000-4-2) | ±20 kV contact / ±20 kV air - Meets Level 4+ immunity requirements for handheld and portable end-equipment. |
| Clamping Voltage (8/20 µs) | ≤13 V at ±4 A - Limits voltage seen by protected IC to safe levels during surge transients. |
| Dynamic Resistance | 0.5 Ω (typ) - Ensures consistent clamping behavior across current range and minimizes voltage overshoot. |
| Operating Temperature Range | –40 °C to +125 °C - Supports deployment in automotive infotainment, industrial HMI, and outdoor portable devices. |
Pinout & Package
AOZ8851ADI-05 uses a 2-terminal DFN 0.62 mm × 0.32 mm × 0.3 mm 0201 package with no polarity marking; both terminals are symmetrical and interchangeable for bidirectional protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode/Cathode (bidirectional) | Connects to protected signal line; identical electrical role to Pin 2 due to symmetric TVS structure. |
| 2 | Anode/Cathode (bidirectional) | Connects to ground reference; functions identically to Pin 1 under positive or negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.22 pF at 1 MHz - Preserves signal rise/fall times and eye diagram integrity on high-speed interfaces. |
| Bidirectional ESD clamping | ±20 kV IEC 61000-4-2 - Protects against both polarities of electrostatic discharge without external biasing. |
| Low clamping voltage | 11.5–13 V at ±4 A (8/20 µs) - Keeps protected IC's I/O voltage within absolute maximum ratings during surge events. |
| Small 0201 footprint | 0.62 mm × 0.32 mm - Reduces PCB area by >50% vs. 0402 TVS diodes, critical for ultra-thin mobile designs. |
Applications
| USB 2.0 Data Lines | HDMI DDC Channel |
|---|---|
Use Scenario: ESD protection on differential USB 2.0 D+ and D− lines in smartphones and OTG adapters. IC Role / Device Role: Bidirectional TVS clamp placed between connector and PHY IC to shunt transients before they reach silicon. Use Value: 0.22 pF capacitance avoids signal degradation at 480 Mbps; ±20 kV rating ensures pass-fail compliance in IEC 61000-4-2 system-level testing. | Use Scenario: Protection of HDMI Display Data Channel (DDC) SDA/SCL lines in portable projectors and docking stations. IC Role / Device Role: Single-line TVS per DDC signal to prevent latch-up or damage during hot-plug insertion. Use Value: 5 V VRWM matches DDC bus voltage; low clamping (<13 V) prevents exceedance of HDMI sink IC's 5.5 V absolute max rating. |
| I²C Sensor Interfaces | Keypad/Button Lines |
Use Scenario: ESD hardening of I²C buses connecting environmental sensors (e.g., temperature, humidity) in wearables. IC Role / Device Role: Per-signal TVS on SDA and SCL lines upstream of microcontroller GPIOs. Use Value: Sub-0.3 pF capacitance eliminates timing skew on 400 kHz standard-mode I²C; –40 °C to +125 °C rating supports operation in sealed enclosures. | Use Scenario: Transient suppression on mechanical keypad matrix scan lines in ruggedized handheld test equipment. IC Role / Device Role: Point-of-entry TVS on each row/column line to absorb finger-touch ESD before reaching MCU inputs. Use Value: Symmetric ±20 kV protection handles repeated contact discharges; 0201 size allows placement directly at membrane switch pads. |
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 mm × 2.7 mm); 5.0 V VRWM; 100 pF capacitance; 13.4 V clamping at 6.4 A | Not suitable for >10 Mbps data lines due to high capacitance; intended for power rail or low-speed signal protection | Select only if board space is unconstrained and signal speed <1 Mbps |
| TPD2E001DRYR | 2-channel, 0.5 pF per line, 5 V VRWM, ±8 kV IEC 61000-4-2, X2SON-6 package | Higher capacitance than AOZ8851ADI-05; lower ESD rating; dual-line integration reduces component count but increases trace coupling risk | Prefer for cost-sensitive dual-line designs where ±8 kV suffices and layout allows shared ground return |
Compared with SMAJ5.0A and TPD2E001DRYR, AOZ8851ADI-05 uniquely combines 0201 size, sub-0.25 pF capacitance, and ±20 kV ESD rating-making it the only option qualified for miniaturized, high-speed 5 V interfaces requiring full IEC Level 4+ compliance without sacrificing signal fidelity.
Availability
AOZ8851ADI-05 is available at Aetrix Electronics and suitable for portable GPS receivers, notebook computer I/O ports, and digital camera sensor interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AOZ8851ADI-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 and Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.
The AOZ8851ADI series was developed specifically for ultra-compact, high-fidelity ESD protection of 3.3 V and 5 V high-speed data lines in consumer and portable electronics.
FAQ
What is the reverse working voltage of the AOZ8851ADI-05?
The AOZ8851ADI-05 has a reverse working voltage (VRWM) of 5 V, meaning it reliably blocks voltages up to 5 V in normal operation without leakage exceeding 100 nA. This rating matches standard 5 V logic and interface buses like USB 2.0 and HDMI DDC, ensuring no false triggering during steady-state operation while remaining fully active for ESD events above that threshold. The AOZ8851ADI-05 maintains this specification across its full –40 °C to +125 °C operating range.
Does the AOZ8851ADI-05 meet IEC 61000-4-2 Level 4 requirements?
Yes, the AOZ8851ADI-05 exceeds IEC 61000-4-2 Level 4, delivering ±20 kV contact and ±20 kV air discharge immunity-surpassing the standard's ±15 kV requirement. This performance is validated per test conditions defined in the datasheet (C = 150 pF, R = 330 Ω). The AOZ8851ADI-05 achieves this while maintaining 0.22 pF capacitance, making it suitable for system-level ESD certification of compact portable devices where both robustness and signal integrity are mandatory.
What is the clamping voltage of the AOZ8851ADI-05 under an 8/20 µs surge?
Under an 8/20 µs surge waveform at ±4 A peak pulse current, the AOZ8851ADI-05 clamps to a maximum of 13 V in the positive direction and –13 V in the negative direction. This value is measured per IEC 61000-4-5 test conditions and ensures protected downstream ICs-such as USB transceivers rated for 5.5 V absolute maximum-remain within safe operating limits. The AOZ8851ADI-05 achieves this clamping with a dynamic resistance of just 0.5 Ω, minimizing voltage overshoot during fast-rising transients.
Can the AOZ8851ADI-05 be used on 3.3 V signal lines?
No-the AOZ8851ADI-05 is specifically rated for 5 V systems, with a 5 V reverse working voltage (VRWM) and 6.5 V minimum breakdown voltage. For 3.3 V applications, the AOZ8851ADI-03 variant is specified, featuring 3.3 V VRWM and 4.6 V VBR. Using AOZ8851ADI-05 on a 3.3 V line risks excessive leakage or premature conduction, potentially disrupting logic levels or increasing standby current. Always match the AOZ8851ADI-xx suffix to the target interface voltage.
What package type does the AOZ8851ADI-05 use, and is it RoHS compliant?
The AOZ8851ADI-05 uses a RoHS-compliant DFN package measuring 0.62 mm × 0.32 mm × 0.3 mm (0201 metric footprint), with lead-free plating and green material construction. It is fully compliant with EU RoHS Directive 2011/65/EU and AOS' Green Policy. The symmetric 2-terminal design requires no orientation during placement, simplifying automated assembly. The AOZ8851ADI-05's small size enables direct placement adjacent to connectors or IC pads without compromising high-frequency performance.
AOZ8851ADI-05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 0201 (0603 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6.5V
- Voltage - Clamping (Max) @ Ipp:
- 28V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.22pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (0.62x0.32)
AOZ8851ADI-05 FAQ
1.How can I place an order for AOZ8851ADI-05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8851ADI-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 AOZ8851ADI-05 reliable?
The price and inventory of AOZ8851ADI-05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8851ADI-05 is usually 5 days.
3.What payment methods are accepted for AOZ8851ADI-05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8851ADI-05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8851ADI-05?
AOZ8851ADI-05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8851ADI-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 AOZ8851ADI-05?
For technical support, including AOZ8851ADI-05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8851ADI-05 requirements.
6.How does Aetrix verify that AOZ8851ADI-05 is sourced from the original manufacturer or authorized distributors?
All AOZ8851ADI-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 AOZ8851ADI-05 meets industry standards.
7.What is the process for return or replacement of AOZ8851ADI-05?
All AOZ8851ADI-05 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8851ADI-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 AOZ8851ADI-05 part is unused and in its original packaging.
Return procedure for AOZ8851ADI-05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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