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Alpha & Omega Semiconductor Inc. AOZ8302ACI-05
- Part No.:
- AOZ8302ACI-05
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 3-SMD, SOT-23-3 Variant
- Datasheet:
-
AOZ8302ACI-05.pdf
- Description:
- TVS DIODE 5VWM 24VC SOT23-3L
- Quantity:
- Payment:
- Shipping:
Inventory:7,419
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Product details
Overview
AOZ8302ACI-05 from Alpha and Omega Semiconductor is a dual-line bidirectional TVS diode for ESD and high-current surge protection in data interfaces, with 5V reverse working voltage, ±30kV IEC 61000-4-2 contact/air ESD rating, 32A IEC 61000-4-5 (8/20µs) peak pulse current, and 11–24V clamping voltage range across 2A–32A surge conditions. It protects Ethernet and telecom I/O lines in compact SOT23-3L packages.
For engineers reviewing the AOZ8302ACI-05 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 32A, dynamic resistance under TLP stress, junction capacitance for signal integrity, and compatibility with IEC 61000-4-2 Level 4 and IEC 61000-4-5 Class II surge requirements.
Technical Context
The AOZ8302ACI-05 integrates two identical bidirectional TVS elements in a single SOT23-3L package, each protecting one I/O line to ground. Its structure enables simultaneous suppression of positive and negative transients on both lines without polarity constraints.
It operates within -40°C to +85°C ambient temperature, supports 100ns TLP testing up to ±30A, delivers ≤0.1Ω dynamic resistance over 1A–30A TLP sweep, and maintains 20pF junction capacitance at 0V bias-critical for preserving signal fidelity in high-speed data interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 5 V - Maximum continuous DC voltage applied before leakage exceeds 1 µA; sets upper limit for protected line operating voltage. |
| Clamping Voltage (VCL) @ 32A | 20–24 V - Peak voltage seen by protected circuit during 8/20µs lightning surge; determines downstream IC survivability margin. |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact / ±30 kV air - Exceeds Level 4 immunity requirement; ensures robustness against user-handling ESD events. |
| Dynamic Resistance (RDNY) | 0.1 Ω - Low incremental resistance under fast TLP stress; minimizes voltage overshoot during sub-100ns transients. |
| Junction Capacitance (CJ) | 20 pF - Measured at 1 MHz, 0 V bias; low enough to avoid signal degradation on 100BASE-TX or USB 2.0 lines. |
| Peak Pulse Current (IPP) | 32 A (8/20µs) - Maximum surge current the device can shunt without failure; defines protection level per IEC 61000-4-5 Class II. |
Pinout & Package
SOT23-3L package: surface-mount, 3-pin, RoHS-compliant, footprint compatible with standard SOT-23 land pattern; dimensions 2.9 mm × 1.3 mm × 1.0 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | I/O Line 1 (Anode/Cathode shared) | Bidirectional transient path for first protected signal line; connects to data line (e.g., ETH_MDIO or USB_DP). |
| Pin 2 | GND | Common reference node for both TVS elements; must be low-inductance connection to system ground plane. |
| Pin 3 | I/O Line 2 (Anode/Cathode shared) | Bidirectional transient path for second protected signal line; connects to complementary data line (e.g., ETH_MDC or USB_DM). |
Key Features
| Feature | Design Value |
|---|---|
| Dual-line bidirectional protection | Single SOT23-3L package protects two independent I/O lines to ground-reduces PCB area vs. discrete diodes. |
| Low clamping voltage at high current | 24 V max at 32A surge ensures downstream 3.3V/5V logic remains within safe operating voltage limits. |
| Ultra-low dynamic resistance | 0.1 Ω measured from 1A to 30A TLP sweep-enables rapid energy diversion with minimal voltage rise. |
| 20 pF junction capacitance | Preserves signal integrity on 100 Mbps Ethernet and USB 2.0 differential pairs without added jitter or attenuation. |
Applications
| Ethernet PHY Interface | Datacom Serial Link |
|---|---|
Use Scenario: Protecting MDI/MDIO or RMII signals in 10/100BASE-TX Ethernet PHYs against ESD and lightning-induced surges. IC Role / Device Role: Bidirectional TVS clamp between each differential pair and ground, absorbing transients before they reach PHY transceiver pins. Use Value: Maintains 20 pF capacitance and <24 V clamping at 32A-prevents latch-up or gate oxide damage in integrated PHYs. | Use Scenario: Shielding RS-485/RS-422 transceiver I/O pins in industrial datacom modules exposed to field wiring surges. IC Role / Device Role: Two-line transient suppressor placed directly at connector entry point, referenced to local ground. Use Value: ±30 kV ESD rating and 32A surge handling meet IEC 61000-4-5 Class II requirements for harsh environments. |
| Telecom Line Interface | USB 2.0 Port Protection |
Use Scenario: Safeguarding FXS/FXO analog telephony interface lines (TIP/RING) against induced surges from telephone line coupling. IC Role / Device Role: Dual-channel TVS connected between each line and system ground, enabling symmetric common-mode surge suppression. Use Value: 5 V VRWM aligns with typical SLIC bias rails; low leakage (<1 µA) avoids loading analog signaling paths. | Use Scenario: ESD hardening of USB 2.0 D+/D− lines on host/device ports subjected to frequent human contact. IC Role / Device Role: Bidirectional clamping diode array placed immediately adjacent to USB connector, minimizing trace inductance. Use Value: 20 pF capacitance prevents signal rise-time degradation; ±30 kV contact ESD rating exceeds USB-IF compliance thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-line TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Single-line, SMA package (4.5 mm × 2.7 mm); 5.0 V VRWM; 400 W peak power; higher capacitance (~400 pF) | Requires two devices + extra PCB area; unsuitable for high-speed data due to capacitance | Select only for low-frequency analog or power rail protection where size and speed are secondary |
| SP1003-050 | Single-line, SOD-323 package; 5.0 V VRWM; ±30 kV ESD; 25 A IEC 61000-4-5 rating; 15 pF capacitance | Requires two devices; smaller footprint than AOZ8302ACI-05 but no integrated dual-line solution | Prefer when board layout allows discrete placement and lower capacitance is prioritized over integration |
Compared with SMAJ5.0A and SP1003-050, the AOZ8302ACI-05 delivers dual-line protection in one SOT23-3L package with optimized 20 pF capacitance and 32A surge rating-reducing component count, PCB area, and parasitic inductance versus discrete alternatives.
Availability
AOZ8302ACI-05 is available at Aetrix Electronics and suitable for Ethernet PHY interfaces, telecom line cards, industrial datacom modules, and USB 2.0 port protection requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for AOZ8302ACI-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 AOZ8302ACI product line delivers compact, high-surge-capability TVS arrays targeting space-constrained data interface protection in networking, telecom, and industrial systems.
FAQ
What is the maximum ambient operating temperature for AOZ8302ACI-05?
The AOZ8302ACI-05 is rated for operation from -40°C to +85°C ambient temperature, as specified in its Absolute Maximum Ratings table. This range supports deployment in commercial and extended-temperature industrial environments, though junction temperature must remain within limits under power dissipation conditions.
Does AOZ8302ACI-05 support bidirectional transient suppression on both I/O lines?
Yes, the AOZ8302ACI-05 integrates two identical bidirectional TVS elements-one between Pin 1 and Pin 2 (GND), and another between Pin 3 and Pin 2 (GND). Each channel clamps both positive and negative transients independently, enabling full protection of differential or single-ended I/O pairs.
What is the clamping voltage of AOZ8302ACI-05 at 2A IEC 61000-4-5 surge current?
Per the Electrical Characteristics table, the AOZ8302ACI-05 exhibits a clamping voltage of 11–14.5 V (positive) and -1.8 to -3.5 V (negative) at 2A IEC 61000-4-5 (8/20µs) surge current. This low-voltage clamping ensures sensitive 3.3V or 5V interface ICs remain within safe operating limits.
Is AOZ8302ACI-05 compliant with IEC 61000-4-4 (EFT) requirements?
Yes, the AOZ8302ACI-05 is rated for ±40A electrical fast transient (EFT) immunity per IEC 61000-4-4. This capability is documented in the Features section of the datasheet and confirms suitability for industrial environments with repetitive switching noise on signal or power lines.
How does the junction capacitance of AOZ8302ACI-05 affect high-speed data lines?
The AOZ8302ACI-05 has a measured junction capacitance of 20 pF at 0 V bias and 1 MHz, which is low enough to avoid significant signal distortion on 100 Mbps Ethernet (100BASE-TX) and USB 2.0 (480 Mbps) differential lines-provided layout minimizes stub length and maintains controlled impedance.
AOZ8302ACI-05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 3-SMD, SOT-23-3 Variant
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 32A
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- Ethernet, Telecom
- Capacitance @ Frequency:
- 20pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AOZ8302ACI-05 FAQ
1.How can I place an order for AOZ8302ACI-05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8302ACI-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 AOZ8302ACI-05 reliable?
The price and inventory of AOZ8302ACI-05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8302ACI-05 is usually 5 days.
3.What payment methods are accepted for AOZ8302ACI-05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8302ACI-05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8302ACI-05?
AOZ8302ACI-05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8302ACI-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 AOZ8302ACI-05?
For technical support, including AOZ8302ACI-05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8302ACI-05 requirements.
6.How does Aetrix verify that AOZ8302ACI-05 is sourced from the original manufacturer or authorized distributors?
All AOZ8302ACI-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 AOZ8302ACI-05 meets industry standards.
7.What is the process for return or replacement of AOZ8302ACI-05?
All AOZ8302ACI-05 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8302ACI-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 AOZ8302ACI-05 part is unused and in its original packaging.
Return procedure for AOZ8302ACI-05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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