My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AOZ8001AJI-12
- Part No.:
- AOZ8001AJI-12
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
AOZ8001AJI-12.pdf
- Description:
- TVS DIODE 12VWM 19VC SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:2,459
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AOZ8001AJI-12 from Alpha & Omega Semiconductor is an ultra-low capacitance TVS diode array designed to protect two high-speed data lines (e.g., xDSL tip/ring) against ESD and lightning surges. It features ±30kV air/contact ESD protection, 12.5V working peak reverse voltage (VRWM), 1.8pF I/O-to-GND capacitance, and clamps transients to ≤19.0V at 12A (8/20µs). It operates across –40°C to +85°C in SOT-143 packaging.
For engineers reviewing the AOZ8001AJI-12 datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance signal integrity preservation, IEC 61000-4-2 Level 4 compliance, 12V operating voltage compatibility, and SOT-143 footprint constraints for space-constrained xDSL and Ethernet interfaces.
Technical Context
The AOZ8001AJI-12 integrates four surge-rated steering diodes and a bidirectional TVS in a single SOT-143 package. Its internal architecture routes transient energy from protected I/O lines (CH1, CH2) to VP (pin 4, +12V rail) or VN (pin 1, ground) via low-inductance paths, enabling fast clamping response under ESD events.
It supports dual-rail operation with VP biased at +12V and VN at ground, delivering 13A surge current handling per IEC 61000-4-5 (8/20µs), while maintaining 1.8pF typical capacitance at 0V bias - critical for preserving signal integrity on high-speed lines like xDSL and 10/100 Ethernet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 12.5V - ensures safe operation on 12V nominal data/power lines without leakage or false triggering |
| VBR (min) | 15.0V @ 1mA - guarantees reliable breakdown only during overvoltage events, not during normal 12V operation |
| VCL (max) | 19.0V @ 12A - limits voltage seen by downstream ICs during worst-case lightning surge, protecting 12V-tolerant PHYs |
| CJ (typ) | 1.8pF @ VR = 0, 1MHz - preserves signal rise/fall times and minimizes insertion loss on >100Mbps interfaces |
| ESD Rating | ±30kV contact & air discharge - meets IEC 61000-4-2 Level 4, eliminating need for external ESD staging |
| Surge Current | ±13A (8/20µs) - handles telecom-grade lightning transients per IEC 61000-4-5 without degradation |
| Operating Temp | –40°C to +85°C - supports industrial and outdoor xDSL/CPE deployments without derating |
Pinout & Package
SOT-143 (4-pin, 1.92mm × 1.30mm × 0.95mm) provides minimal PCB footprint and low parasitic inductance for optimal high-frequency transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VN) | Ground reference terminal | Low-impedance return path for clamped transient current; must connect directly to solid ground plane |
| 2 (CH1) | Data line 1 input/output | Protects first high-speed signal (e.g., xDSL tip); 1.8pF capacitance avoids signal distortion |
| 3 (CH2) | Data line 2 input/output | Protects second high-speed signal (e.g., xDSL ring); independent clamping from CH1 |
| 4 (VP) | +12V supply rail connection | Bias node for steering diodes; ties to local 12V rail to enable bidirectional clamping to power rail |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low I/O–GND capacitance | 1.8pF typical - maintains signal integrity on >400Mbps xDSL and 100BASE-TX links |
| 12V working voltage support | VRWM = 12.5V - matches common xDSL line driver supply rails, avoiding under-voltage false triggers |
| Dual-line protection in one package | CH1 + CH2 channels - reduces component count and layout area vs. discrete diode arrays |
| IEC 61000-4-2 Level 4 compliance | ±30kV contact/air - eliminates need for secondary ESD filtering in certified telecom equipment |
| RoHS-compliant SOT-143 | Lead-free assembly compatible - supports automated reflow without SnPb process dependency |
Applications
| xDSL Line Interface Protection | 10/100 Ethernet Port Protection |
|---|---|
|
Use Scenario: Protecting tip/ring pairs of ADSL/VDSL modems and CPE devices from lightning-induced surges and ESD during field installation. IC Role / Device Role / Timing Role: Bidirectional TVS array clamping transients between CH1/CH2 and VP/VN rails, routing surge energy away from PHY ICs. Use Value: Enables robust 12V-based xDSL designs with <1.8pF loading, preserving DSL signal-to-noise ratio and reach without adding series impedance. |
Use Scenario: Safeguarding RJ-45 Ethernet magnetics and PHY transceivers in industrial switches and routers against ESD and induced surges. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor placed at connector entry point, shunting ESD to chassis ground or 3.3V/5V rails. Use Value: Maintains 100BASE-TX signal fidelity (≤1.8pF) while meeting IEC 61000-4-2 Level 4 - critical for CE/FCC certification. |
| USB 2.0 Data Line Protection | Video Graphics Card Interface |
|
Use Scenario: ESD hardening of USB 2.0 D+/D− lines in host controllers and peripheral hubs exposed to frequent human contact. IC Role / Device Role / Timing Role: Steering diode array directing ±30kV ESD pulses to VBUS (5V) or GND, preventing latch-up in USB transceivers. Use Value: Delivers full IEC 61000-4-2 Level 4 protection with sub-2pF loading - avoids USB 2.0 eye diagram closure and jitter accumulation. |
Use Scenario: Shielding DVI/HDMI auxiliary channels and display data bus lines in graphics cards from board-level ESD during handling and integration. IC Role / Device Role / Timing Role: Ultra-low-capacitance TVS suppressing transients on hot-plug detection and EDID lines without affecting DC logic levels. Use Value: Prevents display enumeration failures and hot-plug glitches by clamping ESD to <19V while adding negligible capacitance to 5V-tolerant I²C buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Semtech RClamp0524P | 5V VRWM, 0.3pF lower capacitance (1.5pF), but rated only for ±12A surge (8/20µs) | Optimized for 3.3V/5V USB/PCIe; insufficient for 12V xDSL rail clamping | Select only for 5V systems requiring lowest possible capacitance; not suitable for AOZ8001AJI-12's 12V use cases |
| Littelfuse SP1003-01FTG | 12V VRWM, same 1.8pF capacitance, but ±30kV ESD rating limited to contact discharge only (no air discharge spec) | Meets IEC 61000-4-2 Level 4 contact only; lacks air discharge validation required for handheld/portable test compliance | Acceptable for cost-sensitive 12V designs where air discharge testing is waived; verify system-level ESD margin |
Compared with RClamp0524P and SP1003-01FTG, the AOZ8001AJI-12 uniquely delivers full ±30kV air/contact ESD immunity *and* ±13A lightning surge capability within a 12V VRWM, 1.8pF SOT-143 package - making it the only option qualified for both telecom surge standards and portable device drop-test requirements.
Availability
AOZ8001AJI-12 is available at Aetrix Electronics and suitable for xDSL customer premises equipment, 10/100 Ethernet infrastructure, and USB 2.0 peripheral designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AOZ8001AJI-12 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 efficiency-critical applications.
The AOZ8001A family was engineered specifically for high-speed interface protection in telecom, computing, and consumer electronics - prioritizing ultra-low capacitance, multi-standard ESD compliance, and compact SOT-143 integration.
FAQ
What is the maximum clamping voltage of AOZ8001AJI-12 under a 12A lightning surge?
The AOZ8001AJI-12 clamps to a maximum of 19.0V when subjected to a 12A (8/20µs) surge current, as specified in its Electrical Characteristics table at TA = 25°C. This value ensures downstream 12V-tolerant PHY ICs remain within safe operating limits during IEC 61000-4-5 events. The AOZ8001AJI-12 achieves this with low dynamic impedance and optimized junction design.
Can AOZ8001AJI-12 be used on 5V interfaces like USB 2.0?
Yes, AOZ8001AJI-12 can protect 5V interfaces such as USB 2.0 D+/D− lines, as confirmed in its General Description and Typical Application diagrams. Its ±30kV ESD rating and 1.8pF capacitance meet USB 2.0 signal integrity requirements. However, the 12.5V VRWM means it will not conduct during normal 5V operation - ensuring no leakage or interference with bus signaling. The AOZ8001AJI-12 remains fully functional in this role.
What is the recommended PCB layout practice for AOZ8001AJI-12 to minimize clamping overshoot?
Per the AOZ8001A datasheet Application Information section, place the AOZ8001AJI-12 as close as possible to the I/O connector, use short and wide traces to VN (pin 1) and VP (pin 4), and connect VN directly to a solid ground plane. Avoid vias in the protection path and keep the loop area between CH1–VN and CH2–VN minimal. These practices reduce parasitic inductance, which directly lowers clamping voltage overshoot during fast ESD events. The AOZ8001AJI-12's performance depends critically on this layout discipline.
Does AOZ8001AJI-12 require an external bias supply on VP pin?
Yes, the VP pin (pin 4) of AOZ8001AJI-12 must be connected to the local +12V rail it is protecting - not left floating or tied to 3.3V/5V. This bias enables the internal steering diodes to clamp transients bidirectionally: positive surges divert to VP, negative surges divert to VN (pin 1, ground). The datasheet specifies VP = +12V for AOZ8001AJI-12 operation, and measurements in the Electrical Characteristics table assume this condition. Operating AOZ8001AJI-12 with incorrect VP bias invalidates its published VCL and surge ratings.
Is AOZ8001AJI-12 compliant with RoHS and halogen-free standards?
Yes, AOZ8001AJI-12 is RoHS compliant and classified as an AOS Green Product with reduced halogen content, as stated in the Ordering Information section of the datasheet. It supports both lead-free and SnPb assembly processes, and its SOT-143 package meets JEDEC moisture sensitivity level (MSL) requirements for standard surface-mount reflow. This makes AOZ8001AJI-12 suitable for environmentally regulated markets including EU and China RoHS.
AOZ8001AJI-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 15V (Typ)
- Voltage - Clamping (Max) @ Ipp:
- 19V
- Current - Peak Pulse (10/1000µs):
- 13A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- Ethernet
- Capacitance @ Frequency:
- 1.8pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
AOZ8001AJI-12 FAQ
1.How can I place an order for AOZ8001AJI-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8001AJI-12 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 AOZ8001AJI-12 reliable?
The price and inventory of AOZ8001AJI-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8001AJI-12 is usually 5 days.
3.What payment methods are accepted for AOZ8001AJI-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8001AJI-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8001AJI-12?
AOZ8001AJI-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8001AJI-12 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 AOZ8001AJI-12?
For technical support, including AOZ8001AJI-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8001AJI-12 requirements.
6.How does Aetrix verify that AOZ8001AJI-12 is sourced from the original manufacturer or authorized distributors?
All AOZ8001AJI-12 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 AOZ8001AJI-12 meets industry standards.
7.What is the process for return or replacement of AOZ8001AJI-12?
All AOZ8001AJI-12 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8001AJI-12, 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 AOZ8001AJI-12 part is unused and in its original packaging.
Return procedure for AOZ8001AJI-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8001AJI-12 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
