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Alpha & Omega Semiconductor Inc. AOZ8S503BDS-03
- Part No.:
- AOZ8S503BDS-03
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
AOZ8S503BDS-03.pdf
- Description:
- 1CH 3.3V BIDIRECTIONAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,449
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Product details
Overview
AOZ8S503BDS-03 from Alpha and Omega Semiconductor is a 1-channel bidirectional TVS diode designed for ESD and surge protection of low-voltage data lines, featuring 3.3 V reverse working voltage, 16 pF junction capacitance, ±30 kV IEC 61000-4-2 ESD rating, 8 A IEC 61000-4-5 surge current, and operation from −40°C to +125°C in a DFN0.6×0.3-2L package-used in mobile phone audio line protection.
For engineers reviewing the AOZ8S503BDS-03 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 11 V at 30 A TLP, bidirectional snapback behavior, low capacitance for high-speed signal integrity, and RoHS/Halogen-Free compliance for portable electronics.
Technical Context
The AOZ8S503BDS-03 integrates two unidirectional TVS diodes in antiparallel configuration to enable bidirectional transient suppression across a single I/O line. Its snapback-triggered clamping mechanism maintains hold voltage at 3.3 V while delivering sub-11 V clamping at 30 A TLP stress.
It meets IEC 61000-4-2 (±30 kV contact/air), IEC 61000-4-5 (8 A, 8/20 μs), and IEC 61000-4-4 (40 A EFT) standards, with guaranteed 16 pF capacitance at 0 V and 1 MHz-critical for preserving signal fidelity on audio and USB-like interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage | 3.3 V - defines maximum continuous DC bias before leakage rises significantly; matches 3.3 V I/O rail systems. |
| Junction Capacitance | 16 pF at 0 V, 1 MHz - enables use on audio lines and low-speed data paths without signal distortion. |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact & air - exceeds Level 4 immunity requirements for handheld consumer devices. |
| Surge Current (IEC 61000-4-5) | ±8 A (8/20 μs) - withstands lightning-induced surges on exposed ports in notebook/mobile designs. |
| Clamping Voltage | 11 V at 30 A TLP - limits transient overvoltage to safe levels for downstream 3.3 V logic inputs. |
| Operating Temperature | −40°C to +125°C junction - supports deployment in battery compartments and near power ICs. |
Pinout & Package
Package: DFN0.6×0.3-2L, 0.6 mm × 0.3 mm × 0.3 mm, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of first diode / Cathode of second diode | Forms one side of bidirectional path; connects to protected line (e.g., MIC+ or SPK+). |
| Pin 2 | Cathode of first diode / Anode of second diode | Completes bidirectional path; ties to reference plane (GND or VCC depending on layout). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional snapback clamping | Enables symmetric protection on AC-coupled or floating lines without polarity constraints. |
| Low 16 pF capacitance | Preserves bandwidth and rise time on analog audio and low-speed digital signals. |
| 3.3 V VRWM with 3.6 V min breakdown | Ensures no conduction during normal 3.3 V operation while triggering reliably above nominal rail. |
| ±30 kV ESD immunity | Meets highest IEC 61000-4-2 requirement for user-accessible ports in consumer electronics. |
Applications
| Mobile Phone Audio Protection | Notebook Audio Jack Protection |
|---|---|
Use Scenario: Protecting microphone and speaker lines in smartphones against ESD from user handling and connector insertion. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed directly at jack or codec I/O pins to shunt transients before reaching sensitive analog front-end circuitry. Use Value: Prevents latch-up or permanent damage to audio codecs operating at 3.3 V with <20 pF signal path budget. | Use Scenario: Safeguarding 3.5 mm audio jack circuits in ultrabooks against repeated hot-plug ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed between jack sleeve/tip contacts and audio codec, referenced to system ground. Use Value: Maintains THD+N <0.01% at 20 kHz while surviving >10,000 ±8 kV HBM strikes per I/O line. |
| USB 2.0 Data Line Clamp | Industrial Sensor Interface Protection |
Use Scenario: Adding secondary ESD protection on D+ and D− lines downstream of integrated USB PHY ESD structures. IC Role / Device Role / Timing Role: Standalone bidirectional clamp supplementing internal PHY protection to meet full IEC 61000-4-2 Level 4 compliance. Use Value: Adds margin beyond internal protection with only 16 pF loading-no USB 2.0 eye diagram degradation. | Use Scenario: Shielding analog sensor outputs (e.g., MEMS microphones, temperature sensors) in factory automation panels exposed to EFT noise. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor cable interface PCB, referenced to local ground plane. Use Value: Withstands 40 A EFT bursts per IEC 61000-4-4 without parameter shift or parametric drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A | Unidirectional, DO-214AC package (3.5 mm × 1.9 mm), 300 W peak power, 100 pF capacitance | Requires external series resistor for bidirectional use; unsuitable for space-constrained mobile PCBs | Select SMAJ3.3A only for cost-sensitive industrial boards where size and capacitance are secondary |
| TPD2E001DRYR | 2-channel, 0.65 mm × 0.65 mm DFN, 10 pF per channel, 3.6 V VRWM, ±8 kV HBM only | Lacks IEC 61000-4-5 surge rating; rated for data-line ESD only-not robust enough for power-rail coupled transients | Choose TPD2E001DRYR when protecting dual low-capacitance lines like I²C, but not for audio power rails |
Compared with SMAJ3.3A and TPD2E001DRYR, the AOZ8S503BDS-03 uniquely delivers bidirectional 3.3 V clamping, 16 pF capacitance, and full IEC 61000-4-5 surge immunity in a 0.6 mm × 0.3 mm footprint-making it optimal for miniaturized, high-reliability audio interfaces requiring both ESD and surge resilience.
Availability
AOZ8S503BDS-03 is available at Aetrix Electronics and suitable for mobile phone audio protection, notebook audio jack safeguarding, and industrial sensor interface hardening requiring stable component supply and long-term lifecycle support.
Supply support for AOZ8S503BDS-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 MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.
The AOZ8S series targets ultra-compact, high-immunity ESD protection for portable electronics, emphasizing low capacitance, bidirectional response, and industry-standard surge compliance in sub-1 mm² packages.
FAQ
What is the clamping voltage of the AOZ8S503BDS-03 at 8 A surge current?
The AOZ8S503BDS-03 exhibits a clamping voltage of 8 V at 8 A peak pulse current under IEC 61000-4-5 (8/20 μs waveform), as specified in the Electrical Characteristics table on page 3 of the Rev. 1.0 datasheet. This ensures downstream 3.3 V components remain within safe operating voltage margins during surge events.
Is the AOZ8S503BDS-03 suitable for protecting USB 2.0 differential pairs?
Yes-the AOZ8S503BDS-03 is suitable for USB 2.0 data line protection due to its 16 pF capacitance, which avoids signal integrity degradation, and its bidirectional clamping that handles both polarities of ESD transients. It must be placed per-line (D+ and D− each require one AOZ8S503BDS-03) with proper PCB layout referencing.
Does the AOZ8S503BDS-03 have a defined hold voltage, and what is its value?
Yes-the AOZ8S503BDS-03 has a specified hold voltage (VHOLD) of 3.3 V at 100 mA, per the Electrical Characteristics table. This snapback characteristic ensures the device remains in low-impedance clamping mode after triggering, preventing re-triggering during sustained overvoltage conditions.
What is the package type and dimensions of the AOZ8S503BDS-03?
The AOZ8S503BDS-03 uses a DFN0.6×0.3-2L package measuring 0.6 mm × 0.3 mm × 0.3 mm, with two terminals and no exposed pad. This ultra-small outline supports high-density placement on mobile PCBs while maintaining thermal performance up to +125°C junction temperature.
Can the AOZ8S503BDS-03 replace a unidirectional TVS in an existing design?
No-the AOZ8S503BDS-03 is inherently bidirectional and cannot substitute for a unidirectional TVS without verifying circuit topology. In unidirectional configurations (e.g., VCC-referenced protection), using AOZ8S503BDS-03 may cause unintended conduction; redesign with proper reference plane assignment is required to leverage its bidirectional capability.
AOZ8S503BDS-03 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):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.6V
- Voltage - Clamping (Max) @ Ipp:
- 8V (Typ)
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 16pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (0.6x0.3)
AOZ8S503BDS-03 FAQ
1.How can I place an order for AOZ8S503BDS-03 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8S503BDS-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 AOZ8S503BDS-03 reliable?
The price and inventory of AOZ8S503BDS-03 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8S503BDS-03 is usually 5 days.
3.What payment methods are accepted for AOZ8S503BDS-03?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8S503BDS-03 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8S503BDS-03?
AOZ8S503BDS-03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8S503BDS-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 AOZ8S503BDS-03?
For technical support, including AOZ8S503BDS-03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8S503BDS-03 requirements.
6.How does Aetrix verify that AOZ8S503BDS-03 is sourced from the original manufacturer or authorized distributors?
All AOZ8S503BDS-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 AOZ8S503BDS-03 meets industry standards.
7.What is the process for return or replacement of AOZ8S503BDS-03?
All AOZ8S503BDS-03 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8S503BDS-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 AOZ8S503BDS-03 part is unused and in its original packaging.
Return procedure for AOZ8S503BDS-03:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8S503BDS-03 Tags
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