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onsemi SZNUP3125WTT1G
- Part No.:
- SZNUP3125WTT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
SZNUP3125WTT1G.pdf
- Description:
- 35V DUAL BI-DIRECTIONAL MID-CAP
- Quantity:
- Payment:
- Shipping:
Inventory:4,233
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Product details
Overview
SZNUP3125WTT1G from onsemi is a dual-line bidirectional TVS diode array designed specifically for CAN bus protection in 24 V automotive and industrial networks. It delivers 120 W peak power dissipation per line (8/20 µs), clamps transients to ≤55 V at 2 A, and features matched diode capacitance (≤2%) and low leakage (<100 nA) for signal integrity in high-speed CAN and CAN-FD systems.
For engineers reviewing the SZNUP3125WTT1G datasheet, pinout, applications, or equivalent options, key selection criteria include IEC 61000-4-2 Level 4 ESD immunity (±21 kV contact), 32 V reverse working voltage, SC-70 package compatibility, and AEC-Q101 qualification for automotive deployment.
Technical Context
The SZNUP3125WTT1G integrates two identical bidirectional Zener TVS diodes in a single SC-70 package, enabling symmetrical transient clamping on both CAN_H and CAN_L lines. Its breakdown voltage (35.6–39 V) and clamping voltage (47–60 V at 1–2 A) are optimized to protect ISO 11898-2-compliant transceivers without interfering with normal 2.5–3.5 V differential signaling.
It meets IEC 61000-4-4 (50 A EFT) and IEC 61000-4-5 (2.0 A lightning surge) requirements while maintaining low line-to-ground capacitance (4.5–6.0 pF at 5 V), ensuring minimal signal distortion in high-speed CAN (up to 1 Mbps) and fault-tolerant CAN topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power Dissipation | 120 W per line (8/20 µs); sustains high-energy surges without failure in automotive load-dump or EFT events |
| Reverse Working Voltage (VRWM) | 32 V; ensures no conduction during normal CAN bus operation up to 24 V nominal + transients |
| Breakdown Voltage (VBR) | 35.6–39 V at 1 mA; defines precise turn-on threshold for reliable overvoltage clamping |
| Clamping Voltage (VC) | 55 V max at 2 A (8/20 µs); limits stress on downstream CAN transceiver to safe levels |
| Diode Capacitance Matching | ≤2% difference between CAN_H/CAN_L paths; preserves differential signal symmetry and timing skew |
| IEC 61000-4-2 ESD | ±21 kV contact discharge; exceeds automotive EMC requirements for robust system-level ESD immunity |
| Operating Junction Temp | −55 °C to +150 °C; supports under-hood and industrial control environments without derating |
Pinout & Package
SC-70 (SOT-323) package, 3-pin surface-mount, Pb-free, RoHS compliant. Pin 1 and Pin 2 are cathodes for CAN_H and CAN_L respectively; Pin 3 is common anode tied to ground reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (CAN_H line) | Connects to CAN_H signal path; provides bidirectional clamping to ground via internal Zener |
| Pin 2 | Cathode (CAN_L line) | Connects to CAN_L signal path; enables matched transient suppression with Pin 1 |
| Pin 3 | Common Anode | Ground reference terminal; completes clamping path for both protected lines |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Transient Suppression | Protects both positive and negative polarity surges on CAN_H and CAN_L without polarity constraints |
| Low Capacitance Matching | ≤2% capacitance mismatch ensures <0.1 ns differential skew-critical for CAN-FD timing budgets |
| AEC-Q101 Qualified | Validated for automotive use including temperature cycling, HTRB, and mechanical shock per AEC standard |
| UL 94 V-0 Flammability Rating | Self-extinguishing polymer housing prevents fire propagation in enclosed vehicle harnesses |
| Pb-Free / Halogen-Free | Complies with RoHS Directive 2011/65/EU and automotive ELV requirements for end-of-life recycling |
Applications
| Automotive CAN Networks | Industrial CAN Control Systems |
|---|---|
Use Scenario: Protection of body control modules and gateway ECUs in 24 V commercial vehicles against ESD and load dump. IC Role / Device Role / Timing Role: Dual-line TVS array placed directly at CAN connector interface to clamp transients before reaching transceiver. Use Value: Enables compliance with ISO 16750-2 (load dump) and ISO 10605 (ESD) without adding discrete components or board area. | Use Scenario: Surge hardening of DeviceNet nodes in factory automation where EFT pulses disrupt communication. IC Role / Device Role / Timing Role: Line-level protector integrated into PCB-level CAN termination network to suppress 50 A EFT bursts. Use Value: Maintains >99.9% uptime in PLC-controlled motion systems by preventing transceiver latch-up during electrical noise events. |
| High-Speed CAN (1 Mbps) | Fault-Tolerant CAN (ISO 11898-3) |
Use Scenario: Signal integrity preservation in ADAS domain controllers requiring CAN-FD data rates up to 5 Mbps. IC Role / Device Role / Timing Role: Low-capacitance (4.5–6.0 pF) dual TVS that minimizes rise-time degradation on differential pairs. Use Value: Prevents bit errors caused by capacitive loading while delivering full IEC 61000-4-2/4-4/4-5 protection. | Use Scenario: Robustness enhancement for agricultural machinery CAN networks exposed to long cable runs and grounding faults. IC Role / Device Role / Timing Role: Symmetrical clamping device supporting ±36 V common-mode tolerance and fail-safe bus biasing. Use Value: Extends bus availability during intermittent shorts-to-battery or shorts-to-ground without disabling communication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CAN bus protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Single-channel, lower peak power (360 W total for 2 lines), higher capacitance (10 pF typical), not AEC-Q101 qualified | Targeted at consumer USB/low-speed interfaces-not validated for automotive CAN EMC standards | Use only in non-automotive, cost-sensitive designs where IEC 61000-4-2 Level 2 suffices |
| SM712.TCT | Dual-line, higher VRWM (12 V), lower clamping (23 V), larger SOT-23-6 package, no capacitance matching spec | Designed for RS-485/RS-232-not optimized for CAN differential impedance or timing | Select when protecting legacy industrial serial links, not CAN physical layer compliance |
Compared with TPD2E001DRYR and SM712.TCT, the SZNUP3125WTT1G uniquely combines AEC-Q101 qualification, matched 4.5–6.0 pF capacitance, and IEC 61000-4-5 lightning surge capability in SC-70-making it the only option qualified for production automotive CAN-FD gateways.
Availability
SZNUP3125WTT1G is available at Aetrix Electronics and suitable for automotive ECUs, industrial CAN gateways, and high-reliability truck telematics systems requiring stable component supply across extended product lifecycles.
Supply support for SZNUP3125WTT1G 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The NUP3125/SZNUP3125 family was engineered specifically to meet stringent ISO 11898-2 and AEC-Q101 requirements for CAN bus transient protection in harsh 24 V vehicle environments.
FAQ
What is the primary function of the SZNUP3125WTT1G in a CAN network?
The SZNUP3125WTT1G serves as a dual-line bidirectional TVS diode array that protects CAN transceivers from ESD, EFT, and lightning-induced surges. It clamps transient voltages on both CAN_H and CAN_L lines to safe levels while preserving signal integrity through matched low capacitance-ensuring reliable operation in automotive and industrial CAN networks.
Is the SZNUP3125WTT1G qualified for automotive use?
Yes, the SZNUP3125WTT1G is AEC-Q101 qualified and PPAP capable. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and mechanical shock-to ensure reliability in under-hood and chassis-mounted automotive applications per ISO 16750 and ISO 10605 standards.
What are the key electrical parameters that define SZNUP3125WTT1G's protection capability?
Key parameters include 32 V reverse working voltage (VRWM), 35.6–39 V breakdown voltage (VBR), ≤55 V clamping voltage at 2 A, 120 W peak power per line (8/20 µs), and ≤2% diode capacitance matching. These values ensure effective transient suppression without interfering with normal CAN signaling or violating ISO 11898-2 voltage margins.
How does the SZNUP3125WTT1G differ from generic TVS diodes in CAN applications?
Unlike generic TVS diodes, the SZNUP3125WTT1G integrates two precisely matched bidirectional elements in one SC-70 package, with guaranteed capacitance matching (<2%), AEC-Q101 qualification, and IEC 61000-4-5 (lightning) compliance. Generic TVS devices lack these coordinated specifications and may introduce differential skew or fail automotive qualification.
Can the SZNUP3125WTT1G be used in both high-speed and fault-tolerant CAN networks?
Yes, the SZNUP3125WTT1G supports both ISO 11898-2 (high-speed CAN, up to 1 Mbps) and ISO 11898-3 (fault-tolerant CAN) due to its symmetrical bidirectional clamping, wide operating temperature range (−55 °C to +150 °C), and ability to withstand common-mode transients up to ±36 V-enabling robust deployment across diverse CAN physical layers.
SZNUP3125WTT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 32V (Max)
- Voltage - Breakdown (Min):
- 35.6V
- Voltage - Clamping (Max) @ Ipp:
- 60V
- Current - Peak Pulse (10/1000µs):
- 2A (8/20µs)
- Power - Peak Pulse:
- 120W
- Power Line Protection:
- No
- Applications:
- CAN
- Capacitance @ Frequency:
- 5.7pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3 (SOT323)
SZNUP3125WTT1G FAQ
1.How can I place an order for SZNUP3125WTT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNUP3125WTT1G 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 SZNUP3125WTT1G reliable?
The price and inventory of SZNUP3125WTT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNUP3125WTT1G is usually 5 days.
3.What payment methods are accepted for SZNUP3125WTT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNUP3125WTT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNUP3125WTT1G?
SZNUP3125WTT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNUP3125WTT1G 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 SZNUP3125WTT1G?
For technical support, including SZNUP3125WTT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNUP3125WTT1G requirements.
6.How does Aetrix verify that SZNUP3125WTT1G is sourced from the original manufacturer or authorized distributors?
All SZNUP3125WTT1G 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 SZNUP3125WTT1G meets industry standards.
7.What is the process for return or replacement of SZNUP3125WTT1G?
All SZNUP3125WTT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZNUP3125WTT1G, 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 SZNUP3125WTT1G part is unused and in its original packaging.
Return procedure for SZNUP3125WTT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZNUP3125WTT1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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