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onsemi SZNSP8814LMTWTAG
- Part No.:
- SZNSP8814LMTWTAG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 10-WDFN
- Datasheet:
-
SZNSP8814LMTWTAG.pdf
- Description:
- 4 CHANNEL ESD & SURGE PROTECTION
- Quantity:
- Payment:
- Shipping:
Inventory:3,804
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Product details
Overview
SZNSP8814LMTWTAG from onsemi is a unidirectional ESD and surge protection diode array designed for high-speed Ethernet signal lines (10/100/GbE), featuring 2 pF max I/O-to-I/O capacitance, 3.0 V reverse working voltage, ±30 kV IEC 61000−4−2 contact ESD protection, and 35 A 8/20 µs surge current capability. It safeguards voltage-sensitive PHY transceiver inputs in automotive IVN and BroadR-Reach systems.
For engineers reviewing the SZNSP8814LMTWTAG datasheet, pinout, applications, or equivalent options, key selection criteria include low clamping voltage under 35 A surge, wettable flank WDFNW10 package for AOI, AEC-Q101 qualification, and flow-through routing compatibility with differential impedance control.
Technical Context
The SZNSP8814LMTWTAG implements four-channel unidirectional TVS protection with GND-referenced clamping architecture, optimized for bidirectional high-speed data lanes where low dynamic capacitance and minimal signal distortion are critical. Its I/O-to-GND breakdown voltage is 3.2–5.0 V at 1 mA, and clamping voltage remains ≤10 V at 35 A (8/20 µs).
Designed for automotive-grade reliability, it meets ISO 10605 (±30 kV) and IEC 61000−4−5 (35 A, 8/20 µs), with junction temperature range −55 °C to +150 °C and UL 94 V−0 flammability rating. The device uses silicon avalanche diode technology with controlled dynamic resistance (RDYN) to ensure predictable voltage limiting during fast transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage | 3.0 V - Matches 3.3 V Ethernet PHY supply rails without leakage-induced signal degradation |
| Max I/O-to-I/O Capacitance | 2.0 pF - Enables >100 MHz signal integrity in GbE and BroadR-Reach links |
| ESD Rating (IEC 61000−4−2) | ±30 kV contact - Provides robust system-level ESD immunity per automotive requirements |
| Surge Current (8/20 µs) | 35 A - Withstands lightning-induced surges in vehicle networking environments |
| Clamping Voltage @ 35 A | 10 V max - Limits transient overvoltage to safe levels for 3.3 V transceivers |
| Junction Temp Range | −55 °C to +150 °C - Supports under-hood and chassis-mounted IVN deployments |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements |
Pinout & Package
Package: WDFNW10 (3.0 mm × 2.0 mm, 0.65 mm pitch), wettable flank, Pb-free, RoHS-compliant surface-mount package with exposed thermal pad (Case 515AL).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | I/O (TX+ or RX+) | Protected high-speed differential input/output line; symmetric layout enables flow-through PCB routing |
| Pin 2 | I/O (TX− or RX−) | Complementary differential pair terminal; matched trace length support preserves impedance balance |
| Pin 4 | I/O (TX+ or RX+) | Second protected channel; identical electrical behavior to Pin 1 for dual-lane applications |
| Pin 5 | I/O (TX− or RX−) | Second complementary channel; supports full-duplex GbE or two BroadR-Reach links |
| Pins 6, 7, 9, 10 | GND | Four dedicated ground terminals - reduce inductance, improve clamping response, and enhance AOI visibility |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through routing scheme | Enables straight-line PCB trace layout across all four I/O pins, minimizing stubs and maintaining 100 Ω differential impedance |
| Wettable flank package | Facilitates automated optical inspection of solder joints without X-ray, improving manufacturing yield in automotive SMT lines |
| Low 2 pF I/O-to-I/O capacitance | Reduces insertion loss and phase skew in 100BASE-T1 and 1000BASE-T1 channels up to 600 MHz |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and mechanical shock per JESD22 standards |
| UL 94 V−0 flammability rating | Meets stringent flame-retardant requirements for enclosed vehicle electronic modules |
Applications
| In-Vehicle Networking (IVN) | Open Alliance BroadR-Reach |
|---|---|
Use Scenario: Protection of Ethernet PHY interfaces in ADAS domain controllers and gateway ECUs exposed to ESD during service or harness mating. IC Role / Device Role / Timing Role: Unidirectional TVS diode array placed directly at connector entry point to clamp transients before reaching PHY IC. Use Value: Prevents latch-up or permanent damage to 3.3 V PHY receivers while maintaining <0.5 dB insertion loss at 100 MHz. | Use Scenario: Surge suppression on single-pair Ethernet links used in camera, radar, and infotainment backbones. IC Role / Device Role / Timing Role: Four-channel ESD protector integrated into OABR PHY reference design to meet ISO 10605 ±30 kV compliance. Use Value: Enables compact 3.0×2.0 mm² layout with matched differential pairs and no added propagation delay. |
| Automotive Ethernet Gateways | 1000BASE-T1 Physical Layer |
Use Scenario: Front-end protection for multi-port Ethernet switches handling mixed 100BASE-T1 and 1000BASE-T1 traffic in zonal architectures. IC Role / Device Role / Timing Role: Primary surge interface between external harness and internal switch PHY, operating continuously at 125 MHz symbol rate. Use Value: Delivers 35 A surge survivability with clamping voltage ≤10 V, ensuring PHY reset logic remains functional post-event. | Use Scenario: Signal line protection in high-bandwidth automotive cameras transmitting uncompressed video over 1000BASE-T1. IC Role / Device Role / Timing Role: Low-capacitance ESD guard on TX/RX differential pairs, placed within 5 mm of PHY bond pads. Use Value: Maintains return loss >15 dB up to 400 MHz and supports IEEE 802.3bp compliance with minimal jitter impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD and surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E05U06DQAR | Lower VRWM (2.5 V), higher typical capacitance (2.5 pF), same WDFN-10 package | Better suited for 2.5 V logic interfaces; less margin for 3.3 V PHY rails | Select when system operates below 2.8 V or requires tighter ESD clamping at lower voltages |
| SP1002-01WTG | Higher VRWM (5.0 V), higher clamping voltage (14 V @ 35 A), same 10-pin WDFN | Compatible with 5 V industrial Ethernet but may exceed safe voltage limits for 3.3 V automotive PHYs | Choose for non-automotive 100BASE-TX applications where higher working voltage is required |
Compared with TPD4E05U06DQAR and SP1002-01WTG, the SZNSP8814LMTWTAG offers optimal balance of 3.0 V VRWM headroom, 10 V clamping at full 35 A surge, and AEC-Q101 qualification-making it the only option qualified for safety-critical automotive Ethernet PHY protection without derating.
Availability
SZNSP8814LMTWTAG is available at Aetrix Electronics and suitable for automotive Ethernet gateways, in-vehicle networking (IVN), and Open Alliance BroadR-Reach systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SZNSP8814LMTWTAG 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 delivering energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.
The SZNSP8814LMTWTAG belongs to onsemi's automotive-qualified ESD protection portfolio, engineered specifically for high-speed serial data buses in harsh vehicular environments where signal fidelity and transient resilience must coexist.
FAQ
What is the maximum clamping voltage of the SZNSP8814LMTWTAG at 35 A surge current?
The SZNSP8814LMTWTAG has a maximum clamping voltage of 10 V at 35 A (8/20 µs pulse), measured I/O-to-GND. This value ensures compatibility with 3.3 V Ethernet PHY receivers by staying well below their absolute maximum input voltage rating, preventing latch-up or permanent damage during lightning-surge events. The clamping performance is validated per IEC 61000−4−5 testing conditions and confirmed in Figure 3 of the official datasheet for SZNSP8814LMTWTAG.
Is the SZNSP8814LMTWTAG qualified for automotive applications?
Yes, the SZNSP8814LMTWTAG is AEC-Q101 qualified and PPAP capable, with full documentation supporting its use in automotive electronics. It meets temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock requirements defined in the AEC-Q101 standard. The "SZ" prefix explicitly denotes automotive-grade traceability, site control, and change management - making SZNSP8814LMTWTAG suitable for deployment in ADAS, gateway, and IVN systems per OEM specifications.
What package type does the SZNSP8814LMTWTAG use, and why is it important for automotive PCB assembly?
The SZNSP8814LMTWTAG uses the WDFNW10 (Case 515AL) package: a 3.0 mm × 2.0 mm, 0.65 mm pitch wettable flank leadless package. Its side-wettable flanks enable reliable automated optical inspection (AOI) of solder joints without requiring X-ray, significantly improving first-pass yield in high-volume automotive SMT lines. This feature is critical for zero-defect manufacturing in safety-relevant ECUs where solder joint integrity directly impacts field reliability.
How does the flow-through pinout of the SZNSP8814LMTWTAG benefit high-speed Ethernet layout?
The SZNSP8814LMTWTAG features a flow-through pinout (Pins 1–2 and 4–5 as I/O pairs, Pins 6/7/9/10 as GND) that allows straight-line PCB routing across the device - eliminating stubs, vias, and asymmetrical traces. This preserves differential impedance matching (100 Ω ±10%) and minimizes skew between TX+/TX− and RX+/RX− pairs in 100BASE-T1 and 1000BASE-T1 designs, directly supporting IEEE 802.3bw/bp compliance and reducing signal integrity validation effort for SZNSP8814LMTWTAG-based layouts.
Does the SZNSP8814LMTWTAG support both IEC 61000−4−2 and IEC 61000−4−5 compliance?
Yes, the SZNSP8814LMTWTAG is rated for ±30 kV contact discharge per IEC 61000−4−2 and 35 A (8/20 µs) per IEC 61000−4−5 Level 3. These ratings are verified through standardized test setups documented in the datasheet (Figures 6–7 for ESD, Figure 2 for surge). The device also meets ISO 10605 (±30 kV) for automotive ESD, confirming its suitability for end-equipment certification where both standards apply - such as SZNSP8814LMTWTAG-protected Ethernet ports in certified vehicle ECUs.
SZNSP8814LMTWTAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 10-WDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3V (Max)
- Voltage - Breakdown (Min):
- 3.2V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 35A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- Ethernet
- Capacitance @ Frequency:
- 2pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 10-WDFNW (3x2)
SZNSP8814LMTWTAG FAQ
1.How can I place an order for SZNSP8814LMTWTAG through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNSP8814LMTWTAG 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 SZNSP8814LMTWTAG reliable?
The price and inventory of SZNSP8814LMTWTAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNSP8814LMTWTAG is usually 5 days.
3.What payment methods are accepted for SZNSP8814LMTWTAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNSP8814LMTWTAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNSP8814LMTWTAG?
SZNSP8814LMTWTAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNSP8814LMTWTAG 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 SZNSP8814LMTWTAG?
For technical support, including SZNSP8814LMTWTAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNSP8814LMTWTAG requirements.
6.How does Aetrix verify that SZNSP8814LMTWTAG is sourced from the original manufacturer or authorized distributors?
All SZNSP8814LMTWTAG 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 SZNSP8814LMTWTAG meets industry standards.
7.What is the process for return or replacement of SZNSP8814LMTWTAG?
All SZNSP8814LMTWTAG units undergo pre-shipment inspection (PSI). If there is an issue with SZNSP8814LMTWTAG, 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 SZNSP8814LMTWTAG part is unused and in its original packaging.
Return procedure for SZNSP8814LMTWTAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZNSP8814LMTWTAG Tags
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