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Alpha & Omega Semiconductor Inc. AOZ8S503BDS-05
- Part No.:
- AOZ8S503BDS-05
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
AOZ8S503BDS-05.pdf
- Description:
- 1CH 5V BIDIRECTIONAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,413
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Product details
Overview
AOZ8S503BDS-05 from Alpha and Omega Semiconductor is a 1-channel bidirectional TVS diode designed for ESD and surge protection of low-voltage data lines. It delivers ±30 kV IEC 61000-4-2 contact/air ESD immunity, 7 A IEC 61000-4-5 (8/20 µs) surge rating, 9 pF junction capacitance, 5 V reverse working voltage, and clamps to ≤11.5 V at 30 A TLP-ideal for audio line protection in mobile phones and notebooks.
For engineers reviewing the AOZ8S503BDS-05 datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance bidirectional clamping, DFN0.6×0.3-2L footprint compatibility, ±30 kV ESD robustness, and 5 V VRWM alignment with USB/audio interface rails.
Technical Context
The AOZ8S503BDS-05 integrates two anti-parallel unidirectional TVS diodes in a single DFN dielectric package, enabling symmetrical clamping for AC-coupled or bidirectional signal lines. Its snapback behavior-evidenced by 6 V hold voltage at 100 mA-ensures sustained low-impedance conduction during multi-pulse transients.
It operates across –40°C to +125°C junction temperature and meets IEC 61000-4-2 (±30 kV), IEC 61000-4-4 (40 A EFT), and IEC 61000-4-5 (±7 A, 8/20 µs) standards. The 9 pF capacitance at 0 V and 1 MHz is measured pin-to-pin with no DC bias, preserving signal integrity on high-speed audio paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | 1-channel bidirectional TVS diode array |
| Reverse Working Voltage (VRWM) | 5 V - matches standard USB, headset, and analog audio rail voltages |
| Junction Capacitance (CJ) | 9 pF at 0 V, 1 MHz - enables <100 MHz bandwidth preservation on stereo audio lines |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact & air - exceeds Level 4 industrial immunity requirements |
| Surge Rating (IEC 61000-4-5) | ±7 A (8/20 µs) - withstands lightning-induced surges on exposed ports |
| Clamping Voltage (VCL) | ≤11.5 V at 30 A TLP - limits transient overvoltage below IC damage thresholds |
| Operating Temperature | –40°C to +125°C TJ - supports automotive cabin and mobile device thermal profiles |
Pinout & Package
AOZ8S503BDS-05 uses a RoHS-compliant, halogen-free DFN0.6×0.3-2L package (0.6 mm × 0.3 mm, 0.3 mm height), optimized for space-constrained mobile PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of D1 / Cathode of D2 | Connects to protected signal line (e.g., MIC_L, HP_R); forms one side of bidirectional clamp path |
| Pin 2 | Cathode of D1 / Anode of D2 | Connects to reference plane (GND or VCC); completes dual-diode anti-parallel configuration |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables protection of AC-coupled or floating signal lines without polarity constraints |
| 9 pF typical junction capacitance | Minimizes insertion loss and phase distortion on 20 kHz–200 kHz audio paths |
| ±30 kV IEC 61000-4-2 ESD rating | Eliminates need for secondary ESD stages in consumer handheld designs |
| 6 V hold voltage (VHOLD) | Maintains low-impedance conduction during multi-pulse EFT events (IEC 61000-4-4) |
| DFN0.6×0.3-2L footprint | Reduces board area by >60% vs. SOT-23-3 while supporting automated reflow assembly |
Applications
| Smartphone Audio Jack Protection | Notebook Headphone Output Protection |
|---|---|
Use Scenario: Protecting 3.5 mm TRRS jack microphone and headphone lines from user-handling ESD in pocket or bag insertion. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector pins to shunt transients before reaching codec IC. Use Value: 9 pF capacitance prevents high-frequency roll-off in 20 Hz–20 kHz audio band; ±30 kV ESD rating ensures pass/fail compliance per IEC 61000-4-2. | Use Scenario: Safeguarding line-out amplifier outputs driving external headphones against accidental cable discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS placed between amplifier output and jack sleeve/shield to suppress common-mode transients. Use Value: 5 V VRWM aligns with typical 3.3–5 V audio amplifier supply rails; DFN0.6×0.3-2L allows placement within 1 mm of jack footprint. |
| USB-C Analog Audio Adapter Protection | Industrial Handheld Scanner Audio Interface |
Use Scenario: Shielding analog audio lanes (MIC, HP_L/R) routed through USB-C to 3.5 mm adapter PCBs from hot-plug ESD. IC Role / Device Role / Timing Role: Primary ESD clamp on each analog signal trace, positioned before level-shifting or filtering components. Use Value: 11.5 V clamping at 30 A TLP prevents latch-up in downstream audio codecs; RoHS/halogen-free status supports global regulatory compliance. | Use Scenario: Protecting voice prompt and microphone inputs in ruggedized barcode scanners subjected to repeated field ESD exposure. IC Role / Device Role / Timing Role: Frontline transient suppressor on audio input/output traces, mounted adjacent to connector to minimize loop inductance. Use Value: –40°C to +125°C operating range ensures reliability in warehouse or outdoor environments; 7 A surge rating handles induced transients from motor-driven mechanisms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Unidirectional, DO-214AC package (4.5 mm × 2.7 mm), 100 pF CJ, 5 V VRWM | Requires external series resistor or dual-device layout for bidirectional protection; unsuitable for high-frequency audio | Select only if board space permits larger footprint and system design accepts higher capacitance |
| TPD2E001DRYR | 2-channel, 0.65 mm × 0.65 mm DFN, 11 pF CJ, 5 V VRWM, ±8 kV HBM only | Lower ESD rating (±8 kV HBM vs. ±30 kV IEC); intended for USB data lines-not optimized for analog audio | Prefer AOZ8S503BDS-05 when IEC-level ESD immunity and sub-10 pF capacitance are mandatory |
Compared with SMAJ5.0A and TPD2E001DRYR, the AOZ8S503BDS-05 uniquely combines true bidirectionality, 9 pF capacitance, and ±30 kV IEC 61000-4-2 rating in a 0.6 mm × 0.3 mm footprint-making it the only option qualified for compact, high-fidelity audio line protection in portable electronics.
Availability
AOZ8S503BDS-05 is available at Aetrix Electronics and suitable for smartphone audio jack protection, notebook headphone output protection, and USB-C analog audio adapter designs requiring stable component supply and full IEC 61000-4-2/4-5 compliance.
Supply support for AOZ8S503BDS-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 AOZ8S503BDS-05 belongs to AOS's ultra-low-capacitance TVS portfolio, engineered specifically for ESD-hardened analog interfaces in space- and performance-constrained portable electronics.
FAQ
What is the maximum clamping voltage of the AOZ8S503BDS-05 under IEC 61000-4-5 surge conditions?
The AOZ8S503BDS-05 clamps to ≤9 V at 7 A peak pulse current (8/20 µs waveform), per its Electrical Characteristics table. This value is measured pin-to-pin under standardized surge test conditions and ensures downstream audio ICs remain below absolute maximum voltage ratings during transient events.
Does the AOZ8S503BDS-05 require external biasing or control signals to operate?
No, the AOZ8S503BDS-05 is a passive, voltage-triggered TVS device with no external bias or enable requirements. It remains in high-impedance state below 5 V reverse working voltage and automatically conducts when transient voltage exceeds breakdown threshold-fully autonomous operation compatible with all analog audio topologies.
Can AOZ8S503BDS-05 be used on a 3.3 V logic line?
Yes-the AOZ8S503BDS-05 has a 5 V reverse working voltage and 6.5–9.5 V breakdown range, making it safe for use on 3.3 V signal lines. Its 9 pF capacitance introduces negligible loading, and clamping begins well above normal operating voltage while remaining below IC damage thresholds.
Is the AOZ8S503BDS-05 compliant with RoHS and halogen-free standards?
Yes, the AOZ8S503BDS-05 is explicitly certified as RoHS compliant and halogen free per AOS Green Product policy. Its DFN0.6×0.3-2L package contains no brominated flame retardants or chlorine-based compounds, satisfying IPC-1752A and EU Directive 2011/65/EU requirements.
How does the AOZ8S503BDS-05 differ from unidirectional TVS diodes like SMAJ5.0A?
The AOZ8S503BDS-05 integrates two anti-parallel diodes for true bidirectional clamping-critical for AC-coupled audio lines-while SMAJ5.0A is unidirectional and requires external circuitry for symmetric protection. Additionally, AOZ8S503BDS-05 offers 9 pF vs. ~100 pF capacitance and a 0.6 mm × 0.3 mm footprint versus SMAJ5.0A's 4.5 mm × 2.7 mm DO-214AC package.
AOZ8S503BDS-05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 0201 (0603 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6.5V
- Voltage - Clamping (Max) @ Ipp:
- 9V (Typ)
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 9pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (0.6x0.3)
AOZ8S503BDS-05 FAQ
1.How can I place an order for AOZ8S503BDS-05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8S503BDS-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 AOZ8S503BDS-05 reliable?
The price and inventory of AOZ8S503BDS-05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8S503BDS-05 is usually 5 days.
3.What payment methods are accepted for AOZ8S503BDS-05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8S503BDS-05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8S503BDS-05?
AOZ8S503BDS-05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8S503BDS-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 AOZ8S503BDS-05?
For technical support, including AOZ8S503BDS-05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8S503BDS-05 requirements.
6.How does Aetrix verify that AOZ8S503BDS-05 is sourced from the original manufacturer or authorized distributors?
All AOZ8S503BDS-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 AOZ8S503BDS-05 meets industry standards.
7.What is the process for return or replacement of AOZ8S503BDS-05?
All AOZ8S503BDS-05 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8S503BDS-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 AOZ8S503BDS-05 part is unused and in its original packaging.
Return procedure for AOZ8S503BDS-05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8S503BDS-05 Tags
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