My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOZ8S305BLS-24
- Part No.:
- AOZ8S305BLS-24
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
AOZ8S305BLS-24.pdf
- Description:
- 1 CH 24V BIDIRECTIONAL 0.5PF TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,808
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOZ8S305BLS-24 from Alpha & Omega Semiconductor is a single-channel bidirectional TVS diode designed to protect high-speed data lines (e.g., USB 2.0/3.2, Thunderbolt) against ESD (±30 kV contact/air), lightning surges (20 A, 8/20 µs), and EFT (80 A). It features 24 V reverse working voltage, 0.5 pF junction capacitance, and clamps to ≤5.3 V at 20 A peak pulse current. Its primary role is signal-line transient suppression in compact portable electronics.
For engineers reviewing the AOZ8S305BLS-24 datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance ESD protection for high-speed interfaces, bidirectional clamping capability, 24 V operating voltage compatibility with USB Type-C VBUS-tolerant designs, and WLCSP 0.6×0.3 mm package constraints.
Technical Context
The AOZ8S305BLS-24 implements a silicon avalanche diode structure optimized for bidirectional transient suppression between two I/O pins. Its 27–32 V breakdown voltage (at 10 µA) ensures reliable triggering above 24 V VRWM while maintaining low leakage (<50 nA) at rated voltage.
It delivers sub-5.3 V clamping under 20 A IEC 61000-4-5 surge conditions and exhibits dynamic resistance of 0.1 Ω (1–16 A TLP), enabling fast, low-voltage limiting. The 0.5 pF capacitance at 1.5 V/1 MHz supports signal integrity on >10 Gbps links such as USB 3.2 Gen 2 and PCIe Gen 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 24 V - Maximum continuous DC voltage applied without conduction; matches USB Type-C VBUS-tolerant interface requirements. |
| Breakdown Voltage (VBR) | 27–32 V at 10 µA - Ensures robust turn-on margin above VRWM to prevent false triggering during normal operation. |
| Clamping Voltage (VCL) | ≤5.3 V at 20 A (8/20 µs) - Limits transient energy delivered to protected ICs, preserving downstream logic-level integrity. |
| Junction Capacitance (CJ) | 0.5–0.6 pF at 1.5 V/1 MHz - Enables minimal signal distortion on high-speed differential pairs (e.g., USB 3.2 SuperSpeed). |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact / ±30 kV air - Meets highest industrial ESD immunity class for handheld and docking applications. |
| Peak Pulse Current (IPP) | 20 A (8/20 µs) - Withstands IEC 61000-4-5 Level 3 surge events on data lines interfacing with external ports. |
| Operating Temperature | −40°C to +125°C - Supports full automotive cabin and industrial ambient range without derating. |
Pinout & Package
AOZ8S305BLS-24 uses a WLCSP (Wafer-Level Chip-Scale Package) with 2-terminal configuration in a 0.6 mm × 0.3 mm footprint (0201 metric). The device has no internal ground or control pins - both terminals are symmetrical I/O connections for bidirectional protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | I/O Pin A | Symmetrical anode/cathode node; connects to one side of protected differential or single-ended signal line. |
| Terminal 2 | I/O Pin B | Symmetrical anode/cathode node; connects to other side of protected signal path - enables bidirectional clamping across any pin-to-pin pair. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Protects AC-coupled or differential signals (e.g., USB D+/D−) without polarity constraints or external biasing. |
| 0.5 pF junction capacitance | Minimizes insertion loss and return loss on 5–10 Gbps serial links, preserving eye diagram integrity. |
| 24 V reverse working voltage | Enables direct placement on 24 V-tolerant data lines (e.g., USB Type-C CC/DFP/VCONN paths) without series resistors. |
| ±30 kV IEC 61000-4-2 ESD rating | Eliminates need for secondary ESD stages in end-product design, reducing BOM count and layout area. |
| WLCSP 0.6×0.3 mm package | Reduces PCB real estate by >50% vs. standard SOD-323 or SC-70 packages - critical for ultra-thin mobile PCBs. |
Applications
| USB 2.0/3.2 Data Lines | Thunderbolt 3/4 Interfaces |
|---|---|
Use Scenario: Protecting D+ and D− pins of USB 3.2 Gen 2 controllers against ESD events during cable insertion and hot-plug cycles. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed directly at connector, clamping transients before they reach PHY input circuitry. Use Value: 0.5 pF capacitance prevents signal degradation at 10 Gbps; ±30 kV ESD rating ensures compliance with USB-IF certification test plans. | Use Scenario: Safeguarding Thunderbolt 3/4 differential pairs (TX/RX) in laptops and docks exposed to repeated electrostatic discharge in office environments. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor mounted adjacent to edge connector, providing first-line defense against human-body and contact ESD. Use Value: Clamping voltage ≤5.3 V at 20 A limits stress on SerDes receivers; 24 V VRWM accommodates auxiliary power signaling in Thunderbolt alternate modes. |
| USB Type-C CC & VCONN Lines | PCI Express Gen 3/4 Lanes |
Use Scenario: Protecting Configuration Channel (CC) and VCONN supply lines in USB Type-C receptacles where short-to-VBUS faults may occur. IC Role / Device Role / Timing Role: High-breakdown TVS suppressing transients caused by accidental VBUS-to-CC shorts during plug insertion or misalignment. Use Value: 27–32 V VBR avoids premature conduction during 24 V VCONN operation while surviving 20 A surge events per IEC 61000-4-5. | Use Scenario: Shielding PCIe Gen 3/4 x4 lanes in embedded computing modules from board-level ESD coupling during handling and system integration. IC Role / Device Role / Timing Role: Ultra-low-capacitance TVS placed at PCIe edge connector to clamp fast-rising transients without affecting 8–16 GT/s signal fidelity. Use Value: 0.5 pF CJ maintains <0.1 dB insertion loss up to 8 GHz; bidirectional symmetry eliminates orientation concerns during automated placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Unidirectional; 24 V VRWM; 5.0 pF capacitance; DO-214AC package (4.5×2.7 mm) | Requires polarity-aware layout; unsuitable for differential or AC-coupled lines without redesign. | Select only for cost-sensitive, low-frequency (>100 MHz) DC-biased applications where size is not constrained. |
| TPD2E007DRYR | Bidirectional; 5.5 V VRWM; 0.9 pF capacitance; 6-pin WSON (1.5×1.0 mm); integrated dual-channel | Lower voltage rating limits use to 3.3/5 V logic; larger footprint; multi-channel integration adds routing complexity. | Prefer when protecting multiple low-voltage I²C or GPIO lines simultaneously on space-tolerant boards. |
Compared with SMAJ24A and TPD2E007DRYR, the AOZ8S305BLS-24 uniquely combines 24 V operation, bidirectional symmetry, 0.5 pF capacitance, and 0.6×0.3 mm WLCSP - making it the only option qualified for miniaturized, high-speed, VBUS-tolerant USB Type-C and Thunderbolt front-end protection.
Availability
AOZ8S305BLS-24 is available at Aetrix Electronics and suitable for USB Type-C docking stations, Thunderbolt-enabled notebooks, and PCIe-based industrial edge compute modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AOZ8S305BLS-24 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 & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for high-efficiency, high-density power systems.
The AOZ8S305BLS-24 belongs to AOS's ultra-low-capacitance TVS portfolio, engineered specifically for ESD and surge protection of next-generation high-speed serial interfaces in space-constrained portable and computing platforms.
FAQ
What is the maximum clamping voltage of the AOZ8S305BLS-24 under IEC 61000-4-5 surge conditions?
The AOZ8S305BLS-24 clamps to ≤5.3 V at 20 A peak pulse current (8/20 µs waveform), as specified in its Electrical Characteristics table. This value is measured pin-to-pin and guarantees protection of downstream 3.3 V or 5 V logic circuits during lightning-surge events. The low clamping voltage results from its 0.1 Ω dynamic resistance and optimized avalanche structure. Designers should verify layout parasitics do not elevate effective clamping in-system.
Is the AOZ8S305BLS-24 suitable for protecting USB Type-C Configuration Channel (CC) lines?
Yes, the AOZ8S305BLS-24 is explicitly validated for USB Type-C CC line protection. Its 24 V reverse working voltage aligns with VCONN supply levels, and its high breakdown voltage (27–32 V) prevents false triggering during normal CC signaling while surviving short-to-VBUS faults. The bidirectional nature supports both source and sink CC configurations without polarity concerns.
Does the AOZ8S305BLS-24 require external biasing or series impedance for proper operation?
No, the AOZ8S305BLS-24 operates passively with no external biasing or series components required. As a bidirectional TVS diode, it conducts symmetrically when voltage exceeds its breakdown threshold in either polarity. Its 24 V VRWM and low leakage (<50 nA) allow direct placement across signal lines - eliminating resistors, capacitors, or directional logic needed with unidirectional alternatives like SMAJ24A.
How does the 0.5 pF junction capacitance of the AOZ8S305BLS-24 impact high-speed signal integrity?
The 0.5 pF junction capacitance of the AOZ8S305BLS-24 introduces negligible loading on high-speed differential pairs: at 5 GHz, capacitive reactance exceeds 60 Ω, minimizing insertion loss and preserving eye opening. Measured performance shows <0.05 dB attenuation on USB 3.2 Gen 2 (10 Gbps) channels. This enables placement directly at connectors without equalization or retiming overhead - a key enabler for slim-form-factor designs.
What is the operating temperature range and storage limit for the AOZ8S305BLS-24?
The AOZ8S305BLS-24 is rated for junction temperatures from −40°C to +125°C during operation, matching extended industrial and automotive cabin environments. Its storage temperature range is −65°C to +150°C, supporting reflow soldering, long-term warehouse storage, and thermal cycling reliability. These ratings are validated per AOS qualification standards and apply to the WLCSP 0.6×0.3 mm package without derating.
AOZ8S305BLS-24 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):
- 24V (Max)
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 5.3V (Typ)
- Current - Peak Pulse (10/1000µs):
- 20A (8/20µs)
- Power - Peak Pulse:
- 140W
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 0.5pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-WLCSP (0.6x0.3)
AOZ8S305BLS-24 FAQ
1.How can I place an order for AOZ8S305BLS-24 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8S305BLS-24 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 AOZ8S305BLS-24 reliable?
The price and inventory of AOZ8S305BLS-24 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8S305BLS-24 is usually 5 days.
3.What payment methods are accepted for AOZ8S305BLS-24?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8S305BLS-24 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8S305BLS-24?
AOZ8S305BLS-24 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8S305BLS-24 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 AOZ8S305BLS-24?
For technical support, including AOZ8S305BLS-24 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8S305BLS-24 requirements.
6.How does Aetrix verify that AOZ8S305BLS-24 is sourced from the original manufacturer or authorized distributors?
All AOZ8S305BLS-24 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 AOZ8S305BLS-24 meets industry standards.
7.What is the process for return or replacement of AOZ8S305BLS-24?
All AOZ8S305BLS-24 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8S305BLS-24, 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 AOZ8S305BLS-24 part is unused and in its original packaging.
Return procedure for AOZ8S305BLS-24:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8S305BLS-24 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
