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onsemi NUP3125WTT1G
- Part No.:
- NUP3125WTT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
NUP3125WTT1G.pdf
- Description:
- 32V DUAL LINE CAN BUS PROTECTOR
- Quantity:
- Payment:
- Shipping:
Inventory:5,795
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Product details
Overview
NUP3125WTT1G from onsemi is a dual-line bidirectional CAN bus transient voltage suppressor (TVS) diode array in SC-70 (SOT-323) package, designed to protect 24 V CAN transceivers against ESD (IEC 61000-4-2 Level 4), EFT (50 A), and lightning surges (2.0 A, 8/20 µs). It delivers 120 W peak power dissipation per line, 32 V reverse working voltage, and ≤100 nA leakage at 32 V - deployed in automotive CAN-FD and fault-tolerant networks.
For engineers reviewing the NUP3125WTT1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage (≤55 V at 1 A), diode capacitance matching (≤2%), and AEC-Q101 qualification for automotive-grade reliability in harsh 24 V environments.
Technical Context
The NUP3125WTT1G integrates two matched bidirectional TVS diodes in a single SC-70 package, each configured as a back-to-back Zener pair to provide symmetrical surge clamping on CAN_H and CAN_L lines. Its breakdown voltage is specified at 35.6–39 V (IT = 1 mA), with clamping voltage ≤55 V at 1 A and ≤60 V at 2 A under 8/20 µs waveform.
It operates across −55 °C to +150 °C junction temperature, supports lead-free reflow up to 260 °C, and meets IEC 61000-4-2 (±21 kV contact/air), -4-4 (50 A), and -4-5 (2.0 A) standards - enabling robust protection without signal integrity degradation in high-speed CAN systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power Dissipation | 120 W per line (8/20 µs); sustains high-energy transients without failure in automotive CAN bus nodes |
| Reverse Working Voltage (VRWM) | 32 V; ensures no conduction during normal 24 V CAN bus operation with margin |
| Clamping Voltage (VC) | ≤55 V at 1 A (8/20 µs); limits voltage seen by transceiver to safe level during surge |
| Diode Capacitance Matching | ≤2% (at 0 V, 5 MHz); preserves differential signal integrity and timing skew between CAN_H/CAN_L |
| Leakage Current (IR) | ≤100 nA at 32 V; avoids loading or bias shift in low-power CAN receivers |
| Breakdown Voltage (VBR) | 35.6–39 V at 1 mA; defines precise turn-on threshold for symmetric bidirectional clamping |
| ESD Rating | ±21 kV (IEC 61000-4-2 contact/air); exceeds automotive EMC requirements for human-handling events |
Pinout & Package
Package: SC-70 (SOT-323), 3-pin surface-mount, Pb-free, RoHS-compliant, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Line 1) | Connects to CAN_H for bidirectional clamping; forms one half of back-to-back Zener pair |
| 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; matched to Pin 1 for balanced differential surge suppression |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Dual-Line Protection | Single SC-70 package protects both CAN_H and CAN_L with matched clamping characteristics |
| Low Capacitance Matching | ≤2% capacitance mismatch ensures <10 ps differential skew, preserving CAN-FD timing margins |
| AEC-Q101 Qualified | Validated for automotive underhood applications including trucks and fault-tolerant CAN networks |
| High Surge Robustness | Withstands 2.0 A (8/20 µs) lightning surges per IEC 61000-4-5, critical for industrial vehicle networks |
| Pb-Free & Halogen-Free | Complies with RoHS, ELV, and JESD201A whisker resistance standards for long-life automotive use |
Applications
| Automotive CAN-FD Nodes | Fault-Tolerant CAN Bus |
|---|---|
Use Scenario: High-speed in-vehicle communication in ADAS ECUs requiring >5 Mbps data rates with ESD immunity. IC Role / Device Role / Timing Role: Bidirectional TVS array clamping transients on differential CAN_H/CAN_L lines before they reach the transceiver input stage. Use Value: Prevents latch-up or damage to ISO 11898-2/3 compliant transceivers while maintaining <5 pF per line capacitance for signal fidelity. | Use Scenario: Redundant bus architecture in commercial vehicles where bus continuity must survive single-point failures. IC Role / Device Role / Timing Role: Dual-line surge protector ensuring both dominant and recessive states remain within safe voltage windows during load dump or coupling events. Use Value: Enables compliance with ISO 11898-2 fault-tolerant voltage thresholds (−2 V to +7 V) under 2.0 A surge conditions. |
| Industrial DeviceNet Networks | Smart Distribution Systems (SDS) |
Use Scenario: Factory automation nodes exposed to motor drive noise and relay switching transients in harsh EMI environments. IC Role / Device Role / Timing Role: Line-level transient suppressor placed directly at connector interface to shunt energy before entering isolation barrier or transceiver. Use Value: Meets IEC 61000-4-4 (50 A EFT) and -4-5 (2.0 A lightning) without derating, supporting 250 kbps DeviceNet operation. | Use Scenario: Distributed power management in building infrastructure with long cable runs susceptible to induced surges. IC Role / Device Role / Timing Role: Dual-channel protector on SDS bus lines (typically 24 V DC) to maintain communication integrity during lightning-induced ground potential rise. Use Value: 120 W per-line rating and −55 °C to +150 °C operating range ensure reliability in uncontrolled ambient installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CAN bus protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM712.TCT | Higher VRWM (12 V / −7 V asymmetric), lower clamping (23 V / −12 V), larger SOT-23-6 package | Optimized for RS-485/RS-422; not AEC-Q101 qualified; lacks diode matching spec | Use only in non-automotive, lower-voltage differential buses where footprint and qualification are secondary |
| TPD2E001DRYR | Lower power rating (350 W total, not per line), 5.5 V VRWM, 0.5 pF typical capacitance | Targeted at USB/low-voltage I/O; unsuitable for 24 V CAN due to premature conduction and insufficient surge margin | Select only for sub-6 V digital interfaces; not a functional substitute for NUP3125WTT1G in CAN systems |
Compared with SM712.TCT and TPD2E001DRYR, the NUP3125WTT1G uniquely combines AEC-Q101 qualification, 32 V VRWM, matched dual-line clamping, and 120 W per-line surge capability - making it the only validated solution for 24 V automotive CAN-FD and fault-tolerant deployments.
Availability
NUP3125WTT1G is available at Aetrix Electronics and suitable for automotive CAN-FD modules, industrial DeviceNet gateways, and smart distribution system controllers requiring stable component supply amid ongoing industry transition from legacy CAN protection devices.
Supply support for NUP3125WTT1G 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 NUP3125WTT1G belongs to onsemi's automotive-qualified transient protection portfolio, engineered specifically to meet stringent ESD/surge immunity and thermal reliability demands of 24 V CAN bus systems in vehicles and heavy equipment.
FAQ
Is NUP3125WTT1G still in production or marked obsolete?
Yes, the NUP3125WTT1G is officially marked as discontinued per onsemi's October 2025 datasheet revision (Rev. 3). However, Aetrix Electronics maintains active inventory and offers lifecycle support, including last-time buy planning and cross-reference guidance for qualified replacements aligned with existing designs using the NUP3125WTT1G.
What is the maximum peak pulse current rating for NUP3125WTT1G?
The NUP3125WTT1G supports a maximum peak pulse current (IPP) of 2.0 A under 8/20 µs waveform conditions, as confirmed in its Electrical Characteristics table. This rating applies per line and is validated per IEC 61000-4-5 testing, ensuring reliable surge handling in automotive and industrial CAN environments where the NUP3125WTT1G is deployed.
Does NUP3125WTT1G support CAN-FD data rates up to 5 Mbps?
Yes, the NUP3125WTT1G supports CAN-FD operation up to 5 Mbps due to its low and tightly matched line-to-ground capacitance (4.5–6.0 pF at 5 V, 1 MHz) and ≤2% capacitance matching. These parameters minimize signal distortion and timing skew - critical for maintaining bit error rate integrity in high-speed CAN-FD physical layers where the NUP3125WTT1G is applied.
Can NUP3125WTT1G be used in 12 V automotive systems?
While the NUP3125WTT1G is optimized for 24 V CAN systems (with 32 V VRWM and 35.6–39 V VBR), it remains compatible with 12 V automotive CAN networks. Its higher standoff voltage provides additional margin against load dump and battery transients, though designers should verify that clamping voltage (≤55 V at 1 A) does not exceed downstream transceiver absolute maximum ratings when using the NUP3125WTT1G in 12 V contexts.
What is the meaning of "SZ" prefix in related part numbers like SZNUP3125WTT1G?
The "SZ" prefix in SZNUP3125WTT1G denotes automotive-grade qualification per AEC-Q101, PPAP capability, and enhanced process control for site-specific change management - distinct from the standard NUP3125WTT1G. Both share identical electrical specs and SC-70 packaging, but only SZ-prefixed variants carry full automotive certification documentation required for Tier 1 vehicle programs using the NUP3125WTT1G family.
NUP3125WTT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3 (SOT323)
NUP3125WTT1G FAQ
1.How can I place an order for NUP3125WTT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NUP3125WTT1G 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 NUP3125WTT1G reliable?
The price and inventory of NUP3125WTT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NUP3125WTT1G is usually 5 days.
3.What payment methods are accepted for NUP3125WTT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NUP3125WTT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NUP3125WTT1G?
NUP3125WTT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NUP3125WTT1G 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 NUP3125WTT1G?
For technical support, including NUP3125WTT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NUP3125WTT1G requirements.
6.How does Aetrix verify that NUP3125WTT1G is sourced from the original manufacturer or authorized distributors?
All NUP3125WTT1G 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 NUP3125WTT1G meets industry standards.
7.What is the process for return or replacement of NUP3125WTT1G?
All NUP3125WTT1G units undergo pre-shipment inspection (PSI). If there is an issue with NUP3125WTT1G, 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 NUP3125WTT1G part is unused and in its original packaging.
Return procedure for NUP3125WTT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NUP3125WTT1G Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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