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onsemi NZQA6V8AXV5T1
- Part No.:
- NZQA6V8AXV5T1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOT-553
- Datasheet:
-
NZQA6V8AXV5T1.pdf
- Description:
- TVS DIODE 4.3VWM 13VC SOT553
- Quantity:
- Payment:
- Shipping:
Inventory:8,559
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Product details
Overview
NZQA6V8AXV5T1 from onsemi is a unidirectional ESD protection diode array in SOT-553 package, designed for transient overvoltage suppression on four independent signal lines. It features 6.8 V nominal breakdown voltage (VBR = 6.47–7.14 V), 4.3 V working peak reverse voltage (VRWM), clamping voltage ≤12 V at 13 A IPP, and IEC 61000-4-2 Level 4 (±8 kV contact) ESD compliance - deployed in USB 1.1/2.0 full-speed interfaces and serial port protection.
For engineers reviewing the NZQA6V8AXV5T1 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 13 A surge, low leakage (<1 µA @ 4.3 V), 6.7 pF typical capacitance at 0 V bias, and compatibility with space-constrained PCB layouts requiring four-line protection in one 1.6 mm × 1.2 mm footprint.
Technical Context
This device integrates four separate unidirectional ESD protection diodes sharing a common anode (Pin 2), enabling simultaneous clamping of four signal lines to ground during transients. Its architecture supports fast response to IEC 61000-4-2 ESD pulses (tP ≈ 0.7–1 ns rise time) while maintaining low dynamic impedance below 1 Ω during clamping.
It operates within −55°C to +150°C junction temperature range, with thermal resistance RJA = 327°C/W on FR-4 board, and derates linearly above 25°C (3.05 mW/°C). Steady-state power dissipation per diode is 380 mW; total for all four diodes is limited to 95 mW due to thermal coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 4.3 V - Maximum continuous reverse voltage before significant leakage; sets upper limit for protected signal swing. |
| VBR @ 1 mA | 6.47–7.14 V - Breakdown threshold ensuring reliable turn-on during transients without false triggering on normal signals. |
| VC @ IPP=13 A | ≤12 V - Clamping voltage limiting stress on downstream ICs during 8 kV ESD events per IEC 61000-4-2. |
| IR @ VRWM | ≤1.0 µA - Low leakage preserves signal integrity and minimizes standby power in battery-powered systems. |
| CJ @ 0 V | 6.7 pF - Capacitance per diode enabling use on USB full-speed (12 Mbps) and RS-232 lines without data distortion. |
| PPK | 20 W - Peak pulse power handling capability for non-repetitive 8/20 µs surges per Figure 5. |
| TJmax | 150°C - Maximum junction temperature defining safe operating area under sustained surge conditions. |
Pinout & Package
SOT-553 (Case 463B) is a 5-pin surface-mount plastic package measuring 1.60 mm × 1.20 mm × 0.60 mm (L × W × H), with gull-wing leads and Pb-free finish. Pin 1 is cathode of Diode 1; Pin 2 is common anode; Pins 3–5 are cathodes of Diodes 2–4 respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Diode 1) | Connects to first protected signal line; current flows from line to common anode during ESD event. |
| 2 | Common Anode | Shared anode tied to system ground; enables compact 4-channel layout with single ground connection. |
| 3 | Cathode (Diode 2) | Connects to second protected signal line; electrically isolated but thermally coupled to other diodes. |
| 4 | Cathode (Diode 3) | Connects to third protected signal line; identical electrical characteristics to Pins 1 and 3. |
| 5 | Cathode (Diode 4) | Connects to fourth protected signal line; supports balanced protection across all four channels. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 Level 4 ESD protection | ±8 kV contact discharge robustness verified per standardized test setup (Figures 3–4), eliminating need for external TVS staging. |
| Four unidirectional diodes in one package | Reduces component count by 75% vs discrete diodes, cutting assembly cost and minimizing interconnect inductance. |
| Low clamping voltage (≤12 V @ 13 A) | Ensures downstream logic ICs (e.g., USB transceivers) remain below absolute maximum ratings during ESD stress. |
| Small SOT-553 footprint (1.6 × 1.2 mm) | Enables placement adjacent to connectors on dense PCBs where space is constrained, such as notebook I/O modules. |
| Compliance with USB 1.1/2.0 full-speed specs | Capacitance (6.7 pF) and leakage (<1 µA) meet timing and signal integrity requirements for 12 Mbps data lines. |
Applications
| USB Full-Speed Interface Protection | RS-232 Serial Port Protection |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of USB 1.1/2.0 full-speed ports against ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Unidirectional clamping diode array providing low-capacitance path to ground during ±8 kV contact discharge. Use Value: Prevents latch-up or damage to USB transceiver ICs while maintaining signal integrity up to 12 Mbps with <7 pF loading. |
Use Scenario: Safeguarding RS-232 driver/receiver pins (TXD, RXD, RTS, CTS) in industrial terminals and medical monitors. IC Role / Device Role / Timing Role: Four-channel transient suppressor absorbing fast-rising ESD pulses before they reach level-shifting circuitry. Use Value: Eliminates need for four discrete diodes, reducing BOM count and PCB real estate by >60% versus SOT-23 solutions. |
| Notebook I/O Expansion Slots | Point-of-Sale Peripheral Interfaces |
|
Use Scenario: Shielding mini-PCIe or ExpressCard signal lanes (e.g., SMBus, USB, PCIe reference clocks) from user-induced ESD. IC Role / Device Role / Timing Role: Compact ESD array placed at connector edge to clamp transients before propagation into baseband controller. Use Value: Maintains signal fidelity on high-speed buses with sub-10 pF capacitance and avoids resonance issues caused by larger packages. |
Use Scenario: Protecting barcode scanner, magnetic stripe reader, and printer interface lines in retail kiosks exposed to frequent human contact. IC Role / Device Role / Timing Role: Multi-line protector for TTL-level control and data lines subject to repeated electrostatic discharge in dry environments. Use Value: Delivers certified Level 4 ESD immunity without compromising long-term reliability under thermal cycling (−55°C to +150°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD5V3U4-2/TR | Higher VRWM (5.0 V), lower VC (≤9.5 V @ 12 A), slightly higher capacitance (10 pF @ 0 V). | Better suited for 5 V logic rails; less ideal for 3.3 V USB lines due to tighter clamping margin. | Prefer when protecting 5 V tolerant interfaces where lower clamping voltage outweighs added capacitance. |
| TPD4E05U06DQAR | Lower VRWM (3.6 V), same 4-channel unidirectional topology, 5.5 pF capacitance, AEC-Q200 qualified. | Designed for automotive infotainment USB ports; includes enhanced reliability testing not required for commercial gear. | Select for automotive-grade designs needing extended temperature validation and zero defect history. |
Compared with NZQA6V8AXV5T1, ES5V3U4-2/TR offers tighter clamping but higher capacitance, making it better for 5 V systems; TPD4E05U06DQAR provides automotive qualification and lower VRWM, trading off cost and availability for mission-critical environments.
Availability
NZQA6V8AXV5T1 is available at Aetrix Electronics and suitable for USB full-speed interfaces, RS-232 serial ports, and notebook I/O expansion slots requiring stable component supply, consistent Pb-free sourcing, and tape-and-reel delivery for automated assembly.
Supply support for NZQA6V8AXV5T1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and ESD protection solutions for automotive, industrial, and computing markets.
The NZQA5V6AXV5 Series, including NZQA6V8AXV5T1, was engineered specifically for high-density, multi-line ESD protection in space-constrained consumer and computing interfaces - prioritizing low capacitance, precise clamping, and compact packaging.
FAQ
What is the maximum working voltage supported by NZQA6V8AXV5T1?
The NZQA6V8AXV5T1 has a working peak reverse voltage (VRWM) of 4.3 V, meaning it can safely protect signal lines operating up to this DC or peak AC voltage without entering conduction. This makes it suitable for 3.3 V systems like USB full-speed interfaces, where signal swings remain within specification limits.
Does NZQA6V8AXV5T1 support bidirectional ESD protection?
No, NZQA6V8AXV5T1 is configured as four unidirectional diodes sharing a common anode (Pin 2). It protects only positive transients on each cathode line relative to ground. For bidirectional protection, a dual-diode configuration or separate devices would be required - NZQA6V8AXV5T1 is not rated for negative-going surges beyond its reverse standoff capability.
How does NZQA6V8AXV5T1 achieve IEC 61000-4-2 Level 4 compliance?
NZQA6V8AXV5T1 achieves IEC 61000-4-2 Level 4 (±8 kV contact discharge) through low-clamping-voltage silicon avalanche structure and optimized junction design. Per Figures 1–2 in the datasheet, its clamping voltage remains ≤12 V during the full 8 kV pulse waveform, keeping downstream ICs within safe operating voltage windows.
What is the thermal derating behavior of NZQA6V8AXV5T1 above 25°C ambient?
NZQA6V8AXV5T1 derates linearly above 25°C ambient at 3.05 mW/°C per diode. With RJA = 327°C/W on FR-4 board, its steady-state power rating drops from 380 mW at 25°C to approximately 278 mW at 55°C ambient - critical for designs operating in enclosed enclosures or near heat sources.
Can NZQA6V8AXV5T1 be used in automotive applications?
NZQA6V8AXV5T1 is not AEC-Q200 qualified and lacks automotive-specific reliability testing (e.g., extended temperature cycling, humidity bias). While it operates from −55°C to +150°C junction temperature, its qualification scope covers commercial and industrial equipment - not automotive ECUs or infotainment systems requiring formal automotive grade certification.
NZQA6V8AXV5T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SOT-553
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 4.3V
- Voltage - Breakdown (Min):
- 6.47V
- Voltage - Clamping (Max) @ Ipp:
- 13V
- Current - Peak Pulse (10/1000µs):
- 1.6A (8/20µs)
- Power - Peak Pulse:
- 20W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 12pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-553
NZQA6V8AXV5T1 FAQ
1.How can I place an order for NZQA6V8AXV5T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NZQA6V8AXV5T1 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 NZQA6V8AXV5T1 reliable?
The price and inventory of NZQA6V8AXV5T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NZQA6V8AXV5T1 is usually 5 days.
3.What payment methods are accepted for NZQA6V8AXV5T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NZQA6V8AXV5T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NZQA6V8AXV5T1?
NZQA6V8AXV5T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NZQA6V8AXV5T1 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 NZQA6V8AXV5T1?
For technical support, including NZQA6V8AXV5T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NZQA6V8AXV5T1 requirements.
6.How does Aetrix verify that NZQA6V8AXV5T1 is sourced from the original manufacturer or authorized distributors?
All NZQA6V8AXV5T1 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 NZQA6V8AXV5T1 meets industry standards.
7.What is the process for return or replacement of NZQA6V8AXV5T1?
All NZQA6V8AXV5T1 units undergo pre-shipment inspection (PSI). If there is an issue with NZQA6V8AXV5T1, 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 NZQA6V8AXV5T1 part is unused and in its original packaging.
Return procedure for NZQA6V8AXV5T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NZQA6V8AXV5T1 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
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