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Alpha & Omega Semiconductor Inc. AOZ8S502BDS-03
- Part No.:
- AOZ8S502BDS-03
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
AOZ8S502BDS-03.pdf
- Description:
- TVS DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:2,286
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Product details
Overview
AOZ8S502BDS-03 from Alpha and Omega Semiconductor is a 1-channel bidirectional high-surge TVS diode designed for ESD and surge protection of low-voltage data lines. It delivers ±30 kV IEC 61000-4-2 ESD immunity, 10 A IEC 61000-4-5 (8/20 µs) surge rating, 23 pF junction capacitance, 3.3 V reverse working voltage, and operates from −40°C to +125°C - ideal for audio line protection in mobile phones and notebook computers.
For engineers reviewing the AOZ8S502BDS-03 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 1A TLP (4.5 V), bidirectional snapback behavior with 3.5 V hold voltage, and DFN1.0×0.6-2L package compatibility with high-density portable PCB layouts.
Technical Context
The AOZ8S502BDS-03 integrates two unidirectional TVS diodes in antiparallel configuration within a single DFN package, enabling symmetrical bidirectional transient suppression. Its snapback-type breakdown mechanism provides low clamping voltage (4.5 V at 1 A TLP) and stable hold voltage (3.5 V at 100 mA), critical for protecting 3.3 V I/O rails without latch-up.
It meets IEC 61000-4-2 (±30 kV contact/air), IEC 61000-4-5 (±10 A, 8/20 µs), and IEC 61000-4-4 (40 A EFT) standards while maintaining 23 pF capacitance at 0 V - ensuring minimal signal distortion on high-speed audio and USB-adjacent lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage | 3.3 V - matches standard 3.3 V logic and audio rail voltage, preventing leakage during normal operation |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact & air - exceeds Level 4 immunity requirements for handheld consumer electronics |
| Surge Rating (IEC 61000-4-5) | ±10 A (8/20 µs) - withstands lightning-induced surges on exposed ports and cables |
| Junction Capacitance | 23 pF at 1 MHz, 0 V - preserves signal integrity on stereo audio lines and low-speed serial interfaces |
| Clamping Voltage (TLP, 1 A) | 4.5 V - limits transient overvoltage below IC damage threshold for 3.3 V I/O pins |
| Hold Voltage | 3.5 V at 100 mA - ensures reliable snapback conduction without false triggering during normal bias |
| Operating Temperature | −40°C to +125°C - supports automotive cabin and industrial edge device deployment |
Pinout & Package
AOZ8S502BDS-03 is housed in a RoHS-compliant, halogen-free DFN1.0×0.6-2L package (1.0 mm × 0.6 mm × 0.5 mm), optimized for space-constrained mobile PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode D1 / Cathode of Diode D2 | Common connection point for bidirectional clamping path; referenced to protected line |
| Pin 2 | Cathode of Diode D1 / Anode of Diode D2 | Second terminal forming antiparallel pair; connects to GND or power rail depending on layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional snapback TVS structure | Enables symmetrical clamping for AC-coupled audio and differential signals without polarity constraints |
| Low 4.5 V clamping at 1 A TLP | Protects 3.3 V I/O pins against fast transients while minimizing risk of downstream IC damage |
| 23 pF junction capacitance | Preserves frequency response up to ~700 MHz on audio paths; avoids attenuation in headset jack circuits |
| ±30 kV IEC 61000-4-2 ESD rating | Meets highest consumer-grade ESD immunity requirement without external shielding or layout derating |
| DFN1.0×0.6-2L footprint | Reduces board area by >50% vs. SOD-323; compatible with 0201-sized pick-and-place equipment |
Applications
| Mobile Phone Audio Jack Protection | Notebook Audio Line Protection |
|---|---|
Use Scenario: Protecting 3.5 mm TRRS headset jack lines (MIC, L/R, GND) from user-hand ESD and cable-borne surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed inline between codec and jack, clamping transients before they reach baseband processor or audio codec. Use Value: Prevents audio pop/crackle, codec latch-up, or permanent I/O damage during daily plug/unplug events. | Use Scenario: Shielding internal audio codec output lines (e.g., HD Audio APO lines) from ESD coupling via metal chassis or keyboard flex cables. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to codec output pins to suppress sub-100 ns ESD pulses without degrading slew rate. Use Value: Maintains SNR >95 dB and THD+N <0.01% while passing IEC 61000-4-2 Level 4 testing. |
| USB-C Sideband Use (SBU) Protection | Industrial Human Interface Panel Audio |
Use Scenario: Guarding USB-C SBU1/SBU2 pins - used for analog audio or sideband signals - against hot-plug ESD and ground bounce. IC Role / Device Role / Timing Role: Standalone bidirectional clamp on each SBU line, operating independently of CC/VBUS protection circuitry. Use Value: Enables robust analog audio passthrough over USB-C without requiring re-timing or level-shifting. | Use Scenario: Protecting front-panel audio inputs on industrial HMIs exposed to maintenance personnel handling and environmental surges. IC Role / Device Role / Timing Role: Primary ESD guard on line-level analog input traces routed across long FR4 runs to main controller board. Use Value: Eliminates field returns due to audio channel dropout after electrostatic discharge during panel servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A | Unidirectional, 5.0 V VBR min, 100 pF CJ, SMA package (4.5 mm × 2.7 mm) | Requires dual-device implementation for bidirectional protection; higher capacitance limits use on audio lines | Select only if board space allows larger footprint and system design permits discrete polarity-aware placement |
| TPD2E001DRYR | 2-channel, 15 pF CJ, 3.6 V VRWM, same DFN1.0×0.6-6L package but 6-pin | Offers dual-line protection in same footprint area but requires routing two protected lines; not pin-compatible | Prefer when protecting stereo pair (L+R) simultaneously; AOZ8S502BDS-03 remains optimal for single-line or space-limited mono paths |
Compared with SMAJ3.3A and TPD2E001DRYR, the AOZ8S502BDS-03 uniquely delivers true single-channel bidirectional clamping in the smallest standardized 2-pin DFN, combining ultra-low capacitance, industry-leading ESD rating, and direct 3.3 V rail compatibility - making it the most area- and performance-efficient choice for discrete audio line protection.
Availability
AOZ8S502BDS-03 is available at Aetrix Electronics and suitable for mobile phone audio jack protection, notebook audio line protection, and USB-C sideband use (SBU) requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for AOZ8S502BDS-03 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 high-efficiency MOSFETs, TVS diodes, and power ICs for computing, consumer, and industrial markets.
The AOZ8S series targets compact, high-reliability ESD/surge protection for low-voltage data interfaces - engineered specifically for space-constrained portable electronics where capacitance, clamping voltage, and package size directly impact end-product certification and acoustic performance.
FAQ
What is the maximum clamping voltage of the AOZ8S502BDS-03 under IEC 61000-4-5 surge conditions?
The AOZ8S502BDS-03 exhibits a clamping voltage of 6.5 V at 10 A peak pulse current (8/20 µs waveform), per its Electrical Characteristics table. This value ensures safe operation for 3.3 V systems by limiting transient overvoltage well below typical IC absolute maximum ratings. The AOZ8S502BDS-03 maintains this performance across its full operating temperature range.
Does the AOZ8S502BDS-03 require external biasing or control signals to function?
No, the AOZ8S502BDS-03 is a passive, self-triggering TVS diode with no external bias or enable requirements. It operates solely based on voltage threshold detection - entering snapback conduction when transient voltage exceeds its breakdown level. The AOZ8S502BDS-03 functions autonomously in-line with protected signal paths.
Can the AOZ8S502BDS-03 be used to protect 5 V logic lines?
No - the AOZ8S502BDS-03 has a 3.3 V reverse working voltage (VRWM) and 3.7 V minimum breakdown voltage, making it unsuitable for continuous 5 V operation due to excessive leakage and premature conduction. For 5 V lines, select a TVS with ≥5.5 V VRWM; the AOZ8S502BDS-03 is strictly rated for 3.3 V nominal systems.
What is the thermal resistance (RθJA) of the AOZ8S502BDS-03 in standard PCB layout?
AOS does not publish RθJA for the AOZ8S502BDS-03 in the Rev. 1.0 datasheet. Its DFN1.0×0.6-2L package relies on copper pour and solder thermal vias for dissipation; junction temperature is managed via short-duration transient energy absorption rather than steady-state power. The AOZ8S502BDS-03 is rated for −40°C to +125°C junction temperature under specified surge/ESD conditions.
Is the AOZ8S502BDS-03 compliant with automotive AEC-Q200 qualification?
No - the AOZ8S502BDS-03 is not AEC-Q200 qualified. It is specified for commercial and industrial applications with an operating junction temperature range of −40°C to +125°C, but lacks the stress testing, failure analysis, and documentation required for automotive qualification. For AEC-Q200 designs, consult AOS' automotive-grade TVS portfolio; the AOZ8S502BDS-03 is intended for consumer and computing use cases.
AOZ8S502BDS-03 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3V (Max)
- Voltage - Breakdown (Min):
- 3.7V
- Voltage - Clamping (Max) @ Ipp:
- 6.5V (Typ)
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 23pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1x0.6)
AOZ8S502BDS-03 FAQ
1.How can I place an order for AOZ8S502BDS-03 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8S502BDS-03 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 AOZ8S502BDS-03 reliable?
The price and inventory of AOZ8S502BDS-03 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8S502BDS-03 is usually 5 days.
3.What payment methods are accepted for AOZ8S502BDS-03?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8S502BDS-03 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8S502BDS-03?
AOZ8S502BDS-03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8S502BDS-03 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 AOZ8S502BDS-03?
For technical support, including AOZ8S502BDS-03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8S502BDS-03 requirements.
6.How does Aetrix verify that AOZ8S502BDS-03 is sourced from the original manufacturer or authorized distributors?
All AOZ8S502BDS-03 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 AOZ8S502BDS-03 meets industry standards.
7.What is the process for return or replacement of AOZ8S502BDS-03?
All AOZ8S502BDS-03 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8S502BDS-03, 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 AOZ8S502BDS-03 part is unused and in its original packaging.
Return procedure for AOZ8S502BDS-03:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8S502BDS-03 Tags
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