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onsemi SZNUP2125WTT1G
- Part No.:
- SZNUP2125WTT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
SZNUP2125WTT1G.pdf
- Description:
- TVS DIODE 24VWM 50VC SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,007
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Product details
Overview
SZNUP2125WTT1G from onsemi is a dual-line bidirectional ESD protection diode in SC-70 (SOT-323) package, designed specifically for CAN and LIN transceivers in automotive networks. It delivers 200 W peak power dissipation per line, clamps at ≤44.0 V under 13 A 8/20 µs surge, and maintains ≤100 nA reverse leakage at 24 V VRWM - enabling robust transient suppression in space-constrained bus interfaces.
For engineers reviewing the SZNUP2125WTT1G datasheet, pinout, applications, or equivalent options, key selection criteria include IEC 61000-4-2 Level 4 contact ESD rating (±30 kV), matched diode capacitance (<2% mismatch), and AEC-Q101 qualification for automotive deployment.
Technical Context
The SZNUP2125WTT1G integrates two identical bidirectional TVS diodes in a single SC-70 package, forming a dual-line array with common-anode configuration. Its breakdown voltage is specified at 27–32 V (IT = 1 mA), and it achieves clamping voltages of 33.4 V (IPP = 1 A) and 44.0 V (IPP = 13 A) under standardized 8/20 µs surges.
It supports full compliance with automotive immunity standards: ISO 7637-1 Pulse 2 (8.0 A, 1/50 µs), ISO 7637-3 EFT (50 A, 5/50 ns), and IEC 61000-4-5 (3.0 A, 8/20 µs). Capacitance is tightly controlled at 4.5–6.0 pF (VR = 5 V, f = 1 MHz), with <0.26% matching between lines - critical for high-speed CAN signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 24 V working peak reverse voltage - matches nominal CAN/LIN bus DC levels without leakage-induced bias shift |
| VBR (min/typ/max) | 27 / 28.5 / 32 V at IT = 1 mA - ensures reliable turn-on before transceiver damage threshold |
| VC @ IPP = 13 A | ≤44.0 V (8/20 µs) - clamps surge below typical CAN transceiver absolute max rating (45 V) |
| CJ @ VR = 5 V | 4.5–6.0 pF - low, matched capacitance preserves >1 Mbps CAN signal rise/fall times |
| IR @ VRWM | ≤100 nA - negligible standby current draw in always-on vehicle networks |
| PPK per line | 200 W (8/20 µs) - sustains repeated ESD/EFT events without degradation |
| IEC 61000-4-2 | ±30 kV contact discharge - exceeds Level 4 requirement for automotive ECUs |
Pinout & Package
SC-70 (SOT-323) package: 3-pin, surface-mount, Pb-free, moisture sensitivity level 1 (MSL1). Dimensions: 2.2 mm × 1.35 mm × 0.95 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Line 1) | Connects to CAN_H or LIN bus line; forms one half of bidirectional clamp path |
| Pin 2 | Anode (Common) | Shared anode node tied to ground; enables dual-line protection with single reference |
| Pin 3 | Cathode (Line 2) | Connects to CAN_L or secondary bus line; mirrors Pin 1 for symmetrical transient handling |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional dual-line protection | Single SC-70 device replaces two discrete TVS diodes - reduces PCB area by >40% vs. discrete solutions |
| Diode capacitance matching | ≤0.26% difference between Line 1 and Line 2 - prevents skew-induced timing errors in differential CAN |
| AEC-Q101 qualified | Validated for automotive temperature range (−55 °C to +175 °C junction) and PPAP-capable - supports Tier 1 production release |
| Low clamping impedance | Rdyn = 0.94 Ω (TLP) - minimizes voltage overshoot during fast transients (e.g., ESD <1 ns rise time) |
| IEC/ISO-compliant immunity | Fully tested to IEC 61000-4-2/4/5 and ISO 7637-1/3 - eliminates need for additional system-level validation effort |
Applications
| CAN Transceiver Protection | LIN Bus Protection |
|---|---|
Use Scenario: Protecting high-speed CAN FD transceivers (up to 5 Mbps) in ADAS domain controllers against ESD coupling via cable harnesses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface, limiting transient voltage to <44 V while preserving signal integrity via 4.5–6.0 pF line-to-ground capacitance. Use Value: Prevents latch-up or permanent damage to CAN PHY during ±30 kV contact ESD events - validated per IEC 61000-4-2 Level 4. | Use Scenario: Safeguarding LIN slave nodes (e.g., door modules, seat controls) from battery dump and load-switch transients in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Dual-line protector with common-anode grounding, absorbing repetitive EFT pulses (50 A, 5/50 ns) per ISO 7637-3 without derating. Use Value: Enables >100,000-cycle reliability in LIN networks by maintaining <100 nA leakage at 24 V VRWM - avoids false wake-up or battery drain. |
| Fault-Tolerant CAN Networks | Automotive Body Control Modules |
Use Scenario: Securing fault-tolerant CAN (FT-CAN) physical layer in powertrain gateways where bus continuity must be maintained after single-point failure. IC Role / Device Role / Timing Role: Dual-clamp array with matched breakdown (27–32 V) and symmetric clamping (±44 V), ensuring balanced voltage limiting on CAN_H/CAN_L during asymmetric surges. Use Value: Maintains differential mode noise margin >2 V under 13 A surge - prevents communication dropout during ISO 7637-1 Pulse 2 (8.0 A, 1/50 µs). | Use Scenario: Integrating into BCM PCBs for lighting, wiper, and HVAC control where space constraints demand minimal footprint protection. IC Role / Device Role / Timing Role: SC-70 packaged ESD suppressor mounted within 5 mm of connector pins, leveraging 2.2 mm × 1.35 mm footprint to fit dense routing zones. Use Value: Delivers 200 W peak power dissipation per line in same area as a 0402 capacitor - eliminates need for larger SO-8 or SOT-23 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD5Z3.3T5G | Lower VRWM (3.3 V), single-line, 12 pF capacitance - unsuitable for 24 V CAN bus | Targeted at low-voltage I/O (USB, GPIO), not automotive bus systems | Select only for sub-5 V digital interfaces; not a functional substitute for SZNUP2125WTT1G in CAN/LIN |
| TPD2E001DRYR | 2-channel, 5.5 V VRWM, 10 pF, ±15 kV HBM - lacks IEC 61000-4-2 Level 4 and AEC-Q101 certification | Designed for consumer port protection (HDMI, USB), not automotive EMI-critical environments | Acceptable for non-automotive industrial CAN nodes; requires revalidation for ISO/IEC immunity |
Compared with ESD5Z3.3T5G and TPD2E001DRYR, the SZNUP2125WTT1G uniquely combines 24 V VRWM, ±30 kV IEC contact ESD rating, AEC-Q101 qualification, and <2% capacitance matching - making it the only drop-in solution for production automotive CAN/LIN transceiver protection without layout or compliance rework.
Availability
SZNUP2125WTT1G is available at Aetrix Electronics and suitable for automotive body control modules, ADAS domain controllers, and LIN-based seat/mirror actuators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SZNUP2125WTT1G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NUP2125 family was engineered specifically for automotive serial bus protection - balancing ultra-low capacitance, high surge robustness, and AEC-Q101 compliance to meet OEM requirements for CAN FD, LIN, and fault-tolerant networks.
FAQ
What is the maximum clamping voltage of the SZNUP2125WTT1G under automotive surge conditions?
The SZNUP2125WTT1G clamps to ≤44.0 V when subjected to a 13 A, 8/20 µs surge waveform - a condition aligned with ISO 7637-1 Pulse 2a testing. This value is measured across each line (CAN_H or CAN_L) referenced to the common anode (Pin 2), and ensures transceiver protection remains within safe operating limits even during worst-case load-dump transients.
Is the SZNUP2125WTT1G certified for automotive use per AEC-Q101?
Yes, the SZNUP2125WTT1G carries full AEC-Q101 qualification and PPAP capability, as confirmed in the official onsemi datasheet (Rev. 9, May 2026). It operates across −55 °C to +175 °C junction temperature and has passed stress tests including HTGB, AC/DC life test, and ESD HBM/MM - making it approved for front-end CAN/LIN interface placement in production automotive ECUs.
How does the diode capacitance matching specification benefit CAN bus performance?
The SZNUP2125WTT1G guarantees ≤0.26% capacitance mismatch between its two protected lines (measured at VR = 0 V, 5 MHz). This tight matching prevents differential signal skew and maintains common-mode rejection ratio (CMRR) in high-speed CAN FD links - directly supporting reliable operation up to 5 Mbps without added jitter or bit error rate degradation.
Can the SZNUP2125WTT1G protect both CAN and LIN buses simultaneously?
Yes - the SZNUP2125WTT1G's 24 V VRWM and bidirectional architecture allow it to protect either CAN (dominant recessive voltage swing ~0–5 V differential, common-mode up to ±40 V) or LIN (single-wire, 12 V nominal) buses. Its common-anode configuration (Pin 2 to GND) enables direct connection to both CAN_H/CAN_L or LIN bus/GND without external biasing components.
What is the thermal derating behavior of the SZNUP2125WTT1G above 25 °C ambient?
The SZNUP2125WTT1G follows standard junction temperature derating: peak power dissipation decreases linearly above 25 °C ambient, reaching ~50% of rated 200 W at +125 °C case temperature. Full derating curves are provided in Figure 5 of the onsemi datasheet, confirming sustained 200 W capability up to +85 °C ambient with standard PCB copper pour cooling.
SZNUP2125WTT1G 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):
- 24V (Min)
- Voltage - Breakdown (Min):
- 26.2V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- CAN
- Capacitance @ Frequency:
- 10pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3 (SOT323)
SZNUP2125WTT1G FAQ
1.How can I place an order for SZNUP2125WTT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZNUP2125WTT1G 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 SZNUP2125WTT1G reliable?
The price and inventory of SZNUP2125WTT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZNUP2125WTT1G is usually 5 days.
3.What payment methods are accepted for SZNUP2125WTT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZNUP2125WTT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZNUP2125WTT1G?
SZNUP2125WTT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZNUP2125WTT1G 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 SZNUP2125WTT1G?
For technical support, including SZNUP2125WTT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZNUP2125WTT1G requirements.
6.How does Aetrix verify that SZNUP2125WTT1G is sourced from the original manufacturer or authorized distributors?
All SZNUP2125WTT1G 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 SZNUP2125WTT1G meets industry standards.
7.What is the process for return or replacement of SZNUP2125WTT1G?
All SZNUP2125WTT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZNUP2125WTT1G, 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 SZNUP2125WTT1G part is unused and in its original packaging.
Return procedure for SZNUP2125WTT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZNUP2125WTT1G Tags
-
ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
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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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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