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Alpha & Omega Semiconductor Inc. AOZ8310DI-20
- Part No.:
- AOZ8310DI-20
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
AOZ8310DI-20.pdf
- Description:
- TVS DIODE 20VWM 44VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,969
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Product details
Overview
AOZ8310DI-20 from Alpha and Omega Semiconductor is a unidirectional high-power TVS diode in a DFN1.6x1.0_2L package, designed to protect 20V power rails against IEC 61000-4-5 surges (32A, 8/20µs), ESD (±30kV air/contact), and EFT (80A). It delivers 1200W peak pulse power with 165pF junction capacitance and clamps to ≤44V at −32A, enabling robust protection for battery-fed mobile power buses.
For engineers reviewing the AOZ8310DI-20 datasheet, pinout, applications, or equivalent options, this device serves as a single-line transient suppressor for low-capacitance, high-surge industrial and portable power rail designs where precise 20V working voltage and sub-100nA leakage are required.
Technical Context
The AOZ8310DI-20 implements a silicon avalanche structure optimized for fast response to 8/20µs surge transients and 100ns TLP events. Its unidirectional configuration provides asymmetric clamping-positive-side clamping at 40–44V (−32A) and negative-side clamping at −5.5 to −7.5V-with dynamic resistance of 0.12Ω (positive) and 0.1Ω (negative) across 1–30A TLP current sweep.
It operates over −40°C to +125°C ambient, supports IEC 61000-4-2 Level 4 (±30kV), IEC 61000-4-4 (80A EFT), and meets RoHS/Green requirements. The DFN-2L package enables compact placement on high-density PCBs without thermal derating concerns up to its rated junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 20 V - maximum continuous DC voltage the device blocks without conduction. |
| Peak Pulse Current (IPP) | 32 A (8/20µs) - sustains surge energy without failure; defines minimum system-level surge withstand capability. |
| Clamping Voltage (VCL) | 44 V at −32A (8/20µs) - maximum voltage seen by protected IC during worst-case surge event. |
| Junction Capacitance (CJ) | 165 pF at 0V, 1MHz - low enough to avoid signal integrity degradation on 20V power rails with moderate slew rates. |
| Reverse Leakage (IR) | 2 nA typical at 20V - negligible standby current draw critical for battery-powered systems. |
| Peak Pulse Power (PPP) | 1200 W (8/20µs) - quantifies total transient energy absorption capacity before thermal failure. |
| ESD Rating | ±30 kV contact & air (IEC 61000-4-2) - exceeds Level 4 immunity, eliminating need for secondary ESD stages. |
Pinout & Package
AOZ8310DI-20 is housed in a 1.6 mm × 1.0 mm, 2-terminal DFN package with exposed pad (no thermal pad connection required per datasheet). Terminals are anode and cathode; polarity is fixed for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (connected to protected power rail) | Accepts positive transients; conducts when rail voltage exceeds breakdown threshold. |
| Cathode | Ground reference (connected to system GND) | Sinks surge current to ground; establishes clamping reference for bidirectional suppression behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables asymmetric clamping: tight positive-side control (≤44V @ −32A) and low negative-side clamp (≤−7.5V), ideal for DC-biased rails. |
| 1200W peak pulse power rating | Supports sustained 8/20µs surges up to 32A without degradation-exceeds IEC 61000-4-5 Class 3 (20A) requirements. |
| 165pF junction capacitance | Minimizes loading on 20V power distribution networks, preserving voltage regulation stability and reducing noise coupling. |
| Sub-100nA reverse leakage at VRWM | Extends battery life in always-on portable devices; eliminates measurable quiescent drain on 20V Li-ion or USB-PD rails. |
| IEC 61000-4-2 ±30kV ESD immunity | Eliminates need for external ESD diodes in front-end protection schemes-single-device compliance for full-system ESD certification. |
Applications
| Battery Protection Circuit | USB-C Power Delivery Bus |
|---|---|
|
Use Scenario: Protecting 20V Li-ion battery packs from load dump, hot-plug, and ESD during charging/discharging cycles. IC Role / Device Role / Timing Role: Primary unidirectional surge clamp placed between battery terminal and PMIC input. Use Value: Clamps 32A surges to ≤44V while drawing only 2nA leakage-preserves battery runtime and prevents PMIC latch-up. |
Use Scenario: Safeguarding 20V VBUS lines in USB-C PD 3.0 sink applications subject to cable-induced surges and connector ESD. IC Role / Device Role / Timing Role: First-line TVS on VBUS path upstream of buck converter and load switch. Use Value: 165pF capacitance avoids PD communication disruption; ±30kV ESD rating ensures full USB-IF compliance without additional components. |
| Industrial Sensor Node Power Rail | Automotive Body Control Module (BCM) 20V Supply |
|
Use Scenario: Securing 20V auxiliary power for wireless sensor nodes exposed to lightning-induced surges in outdoor installations. IC Role / Device Role / Timing Role: Standalone TVS on 20V input rail feeding MCU and RF transceiver. Use Value: 1200W pulse rating handles 8/20µs transients from nearby strikes; −40°C to +125°C rating ensures field reliability. |
Use Scenario: Protecting 20V supply to BCM microcontrollers and CAN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamp on switched 20V rail downstream of main fuse. Use Value: 44V clamping limits stress on 24V-tolerant logic; RoHS/Green compliance meets automotive environmental standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | DO-214AC package (4.5×2.7mm); 32.4V VBR; 400W PPP; 350pF CJ | Larger footprint; higher capacitance limits use in high-speed or space-constrained designs | Choose SMAJ20A only if board area and layout flexibility permit larger SMC package and higher capacitance is acceptable. |
| TPD2E007DBVR | SOT-23-3; dual-channel; 5V VRWM; 12pF CJ; 200W PPP | Not rated for 20V operation; insufficient surge rating (12A max); intended for data-line, not power-rail protection | TPD2E007DBVR is unsuitable for AOZ8310DI-20's 20V power rail role-select only for low-voltage signal line ESD, not power bus surge. |
Compared with SMAJ20A and TPD2E007DBVR, AOZ8310DI-20 uniquely combines 20V VRWM, 1200W surge rating, ultra-low 165pF capacitance, and DFN1.6×1.0 size-making it the only viable option for compact, high-reliability 20V power rail protection requiring both ESD and surge immunity.
Availability
AOZ8310DI-20 is available at Aetrix Electronics and suitable for battery protection circuits, USB-C power delivery systems, and industrial sensor node power rails requiring stable component supply and long-term lifecycle support.
Supply support for AOZ8310DI-20 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 AOZ8310DI series was developed specifically for high-power, low-capacitance transient protection of DC power rails from 2.5V to 36V-targeting mobile, industrial, and automotive subsystems demanding compact, certified surge resilience.
FAQ
What is the clamping voltage of AOZ8310DI-20 under a 32A 8/20µs surge?
The AOZ8310DI-20 clamps to a maximum of 44 V at −32A (8/20µs), and 40 V at +32A, per the IEC 61000-4-5 test condition specified in the Rev. 3.0 datasheet. This ensures protected downstream ICs see no more than 44 V during worst-case surge events on a 20V rail. The AOZ8310DI-20 achieves this with a dynamic resistance of 0.12Ω on the positive side and 0.1Ω on the negative side.
Does AOZ8310DI-20 meet IEC 61000-4-2 Level 4 ESD requirements?
Yes, AOZ8310DI-20 is rated for ±30 kV air discharge and ±30 kV contact discharge per IEC 61000-4-2, exceeding Level 4 (±15 kV air / ±8 kV contact) by a 2× margin. This allows system-level ESD certification without cascaded protection stages. The AOZ8310DI-20 achieves this via optimized junction design and low-leakage silicon process, validated in AOS characterization labs.
What is the junction capacitance of AOZ8310DI-20 and why does it matter?
The AOZ8310DI-20 has a junction capacitance of 165 pF measured at 0 V and 1 MHz. This low value minimizes AC loading on 20V power rails, preventing voltage droop during fast transients and avoiding interference with adjacent high-speed signals. For comparison, legacy TVS diodes like SMAJ20A measure 350 pF-making AOZ8310DI-20 essential for dense, noise-sensitive layouts where AOZ8310DI-20 is deployed.
Can AOZ8310DI-20 be used in automotive applications?
AOZ8310DI-20 operates from −40°C to +125°C and is RoHS/Green compliant, satisfying core environmental and thermal requirements for automotive body electronics. However, it is not AEC-Q200 qualified, and AOS explicitly excludes life-support and safety-critical automotive use per its Life Support Policy. AOZ8310DI-20 may be used in non-safety BCM or infotainment auxiliary rails where customer validation confirms suitability.
How does AOZ8310DI-20 differ from other variants in the AOZ8310DI family?
AOZ8310DI-20 is the 20V-rated variant, with VRWM = 20 V, VBR = 22–28 V, IPP = 32 A, and CJ = 165 pF. Other variants differ in working voltage (e.g., AOZ8310DI-12 = 12V, AOZ8310DI-36 = 36V), resulting in proportional changes to VBR, IPP, clamping voltage, and capacitance. All share the same DFN1.6×1.0_2L package, −40°C to +125°C range, and ±30kV ESD rating-so AOZ8310DI-20 is selected strictly for 20V system compatibility.
AOZ8310DI-20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 2-UDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V (Max)
- Voltage - Breakdown (Min):
- 22V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 32A (8/20µs)
- Power - Peak Pulse:
- 1200W (1.2kW)
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 165pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x1)
AOZ8310DI-20 FAQ
1.How can I place an order for AOZ8310DI-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8310DI-20 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 AOZ8310DI-20 reliable?
The price and inventory of AOZ8310DI-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8310DI-20 is usually 5 days.
3.What payment methods are accepted for AOZ8310DI-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8310DI-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8310DI-20?
AOZ8310DI-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8310DI-20 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 AOZ8310DI-20?
For technical support, including AOZ8310DI-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8310DI-20 requirements.
6.How does Aetrix verify that AOZ8310DI-20 is sourced from the original manufacturer or authorized distributors?
All AOZ8310DI-20 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 AOZ8310DI-20 meets industry standards.
7.What is the process for return or replacement of AOZ8310DI-20?
All AOZ8310DI-20 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8310DI-20, 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 AOZ8310DI-20 part is unused and in its original packaging.
Return procedure for AOZ8310DI-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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