My Inquiry
My Account
onsemi NUP3125WTT3G
- Part No.:
- NUP3125WTT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
NUP3125WTT3G.pdf
- Description:
- NUP3125WTT3G
- Quantity:
- Payment:
- Shipping:
Inventory:9,972
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NUP3125WTT3G from onsemi is a dual-line bidirectional TVS diode array designed to protect CAN transceivers in 24 V automotive and industrial networks. It delivers 120 W peak power dissipation per line (8/20 µs), clamps at ≤55 V @ 2 A, and features matched diode capacitance (≤2% mismatch) with <100 nA reverse leakage at 32 V. It is deployed in high-speed and fault-tolerant CAN bus interfaces.
For engineers reviewing the NUP3125WTT3G datasheet, pinout, applications, or equivalent options, key selection criteria include IEC 61000-4-2 Level 4 ESD immunity (±21 kV contact/air), low 4.5–6.0 pF line-to-GND capacitance at 5 V bias, and AEC-Q101 qualification for automotive use.
Technical Context
The NUP3125WTT3G integrates two identical bidirectional Zener TVS diodes in a single SC-70 (SOT-323) package, configured as a common-anode dual-channel array. Each channel provides symmetrical clamping for CAN_H and CAN_L lines, with breakdown voltage specified at 35.6–39 V and clamping voltage ≤60 V at 2 A peak pulse current.
It meets IEC 61000-4-4 (50 A EFT) and IEC 61000-4-5 (2.0 A lightning surge), operates across −55 °C to +150 °C junction temperature, and maintains ≤2% capacitance matching between lines - critical for preserving CAN signal integrity and minimizing skew in differential signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power Dissipation | 120 W per line (8/20 µs waveform); sustains transient energy without degradation in CAN bus protection. |
| Clamping Voltage | ≤55 V @ 1 A, ≤60 V @ 2 A; limits transceiver stress during ESD/EFT events to safe levels. |
| Breakdown Voltage | 35.6–39 V @ 1 mA; ensures reliable conduction onset above 24 V system rail while avoiding false triggering. |
| Line-to-GND Capacitance | 4.5–6.0 pF @ 5 V, 1 MHz; minimizes signal distortion and timing skew on high-speed CAN (up to 5 Mbps). |
| Capacitance Matching | ≤2% difference between CAN_H and CAN_L paths; preserves differential mode integrity and common-mode rejection. |
| ESD Immunity | ±21 kV contact & air (IEC 61000-4-2 Level 4); exceeds automotive OEM requirements for connector-level ESD robustness. |
| Operating Temperature | −55 °C to +150 °C; supports under-hood and industrial control environments without derating loss. |
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 (CAN_H) | Protected node for CAN_H line; connects to transceiver's CAN_H output via PCB trace. |
| Pin 2 | Anode (Common) | Shared anode tied to ground reference; enables bidirectional clamping for both data lines. |
| Pin 3 | Cathode (CAN_L) | Protected node for CAN_L line; connects to transceiver's CAN_L output with matched trace length. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Dual-Line Protection | Single SC-70 package protects both CAN_H and CAN_L with matched clamping characteristics - eliminates discrete dual-diode layout complexity. |
| Low Capacitance Matching | ≤2% capacitance mismatch between lines ensures <10 ps differential skew, preserving CAN FD timing margins up to 5 Mbps. |
| AEC-Q101 Qualified | Validated for automotive applications including trucks and body control modules; supports PPAP documentation requirements. |
| IEC 61000-4-5 Compliance | Withstands 2.0 A (8/20 µs) lightning surge per line - meets ISO 16750-2 Pulse 5b for 24 V vehicle systems. |
Applications
| Automotive CAN Networks | Industrial CAN Control |
|---|---|
Use Scenario: High-speed CAN bus in engine control units (ECUs) exposed to connector-level ESD and load dump transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp protecting CAN transceiver I/O pins against ±21 kV ESD and 50 A EFT bursts. Use Value: Prevents transceiver latch-up or permanent damage while maintaining <60 V clamping to keep VIO within safe operating area. | Use Scenario: Smart Distribution Systems (SDS) in factory automation where CAN nodes operate near motor drives and switching power supplies. IC Role / Device Role / Timing Role: Surge suppression element on CAN physical layer, placed between transceiver and bus connector. Use Value: Enables >1 million connect/disconnect cycles without performance drift due to low leakage (<100 nA) and stable capacitance over temperature. |
| Fault-Tolerant CAN | Truck & Heavy-Duty Vehicle Networks |
Use Scenario: Fault-tolerant CAN implementations requiring continued operation during single-wire failure or short-to-battery conditions. IC Role / Device Role / Timing Role: Differential line protector that remains functional even when one line is pulled to battery or ground. Use Value: Maintains clamping symmetry and ≤2% capacitance match to avoid common-mode imbalance that could trigger fault detection falsely. | Use Scenario: CAN backbone in commercial trucks with wide ambient temperature swings (−40 °C to +125 °C under hood). IC Role / Device Role / Timing Role: Primary ESD/surge guard for multi-node CAN clusters connecting ABS, transmission, and cab electronics. Use Value: Operates reliably at +150 °C junction temperature with no derating required - validated per AEC-Q101 high-temp life test. |
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 clamping voltage (≤130 V @ 1 A), larger SOT-23-6 package, asymmetric unidirectional design. | Targeted at RS-485/RS-422; not optimized for CAN differential impedance or capacitance matching. | Use only if higher voltage tolerance is needed and board space allows larger footprint. |
| TPD2E001DRYR | Lower power rating (360 W total, not per line), 5.5 pF typical capacitance, but lacks IEC 61000-4-5 compliance. | Designed for USB/low-speed digital I/O; not AEC-Q101 qualified or validated for 24 V CAN bus surge profiles. | Suitable for non-automotive embedded CAN nodes where ESD-only protection suffices and lightning surge is absent. |
Compared with SM712.TCT and TPD2E001DRYR, the NUP3125WTT3G uniquely combines per-line 120 W surge handling, ≤2% capacitance matching, AEC-Q101 qualification, and IEC 61000-4-5 compliance - making it the only option qualified for full-spectrum CAN bus protection in automotive and industrial 24 V systems.
Availability
NUP3125WTT3G is available at Aetrix Electronics and suitable for automotive ECUs, industrial CAN controllers, and truck telematics modules requiring stable component supply and long-term lifecycle support.
Supply support for NUP3125WTT3G 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 electronics, with leadership in automotive, industrial, and cloud power solutions.
The NUP3125WTT3G belongs to onsemi's transient voltage suppression portfolio, engineered specifically for high-reliability CAN bus protection in 24 V systems - balancing low capacitance, precise matching, and full IEC/ISO compliance.
FAQ
What is the primary function of the NUP3125WTT3G in a CAN system?
The NUP3125WTT3G serves as a dual-line bidirectional TVS diode array that protects CAN transceivers from ESD, EFT, and lightning surges. It clamps transient voltages on both CAN_H and CAN_L lines to safe levels while maintaining signal integrity through matched capacitance and low leakage. Its design ensures the NUP3125WTT3G remains effective across automotive and industrial 24 V CAN networks without compromising data rate or reliability.
Is the NUP3125WTT3G qualified for automotive applications?
Yes, the NUP3125WTT3G is AEC-Q101 qualified and PPAP capable, meeting stringent automotive reliability standards. It is explicitly rated for under-hood and chassis-mounted CAN nodes in passenger vehicles and trucks. The NUP3125WTT3G operates from −55 °C to +150 °C and passes thermal cycling, humidity testing, and mechanical shock validation required by automotive OEMs.
What is the pin configuration and how should the NUP3125WTT3G be laid out on the PCB?
The NUP3125WTT3G uses a 3-pin SC-70 package with Pin 1 = CAN_H cathode, Pin 2 = common anode (ground), and Pin 3 = CAN_L cathode. For optimal performance, place the NUP3125WTT3G as close as possible to the CAN connector, use symmetric trace lengths to both cathodes, and tie Pin 2 directly to a low-inductance ground plane. Avoid vias in protection paths to preserve clamping speed.
Does the NUP3125WTT3G support CAN FD data rates up to 5 Mbps?
Yes, the NUP3125WTT3G supports CAN FD operation up to 5 Mbps due to its low and tightly matched line-to-GND capacitance (4.5–6.0 pF at 5 V bias) and ≤2% capacitance mismatch. These parameters minimize signal rise-time degradation and differential skew - verified in onsemi's application circuits for high-speed CAN. The NUP3125WTT3G maintains signal fidelity without requiring additional equalization or termination adjustments.
How does the NUP3125WTT3G compare to standard single-line TVS diodes in CAN protection?
Unlike single-line TVS diodes, the NUP3125WTT3G integrates matched dual channels in one SC-70 package, ensuring identical clamping behavior and capacitance on CAN_H and CAN_L. This eliminates inter-channel timing skew and simplifies layout. Standard discrete diodes risk mismatched response, leading to common-mode noise and false error frames - issues the NUP3125WTT3G inherently avoids by design.
NUP3125WTT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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)
NUP3125WTT3G FAQ
1.How can I place an order for NUP3125WTT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NUP3125WTT3G 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 NUP3125WTT3G reliable?
The price and inventory of NUP3125WTT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NUP3125WTT3G is usually 5 days.
3.What payment methods are accepted for NUP3125WTT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NUP3125WTT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NUP3125WTT3G?
NUP3125WTT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NUP3125WTT3G 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 NUP3125WTT3G?
For technical support, including NUP3125WTT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NUP3125WTT3G requirements.
6.How does Aetrix verify that NUP3125WTT3G is sourced from the original manufacturer or authorized distributors?
All NUP3125WTT3G 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 NUP3125WTT3G meets industry standards.
7.What is the process for return or replacement of NUP3125WTT3G?
All NUP3125WTT3G units undergo pre-shipment inspection (PSI). If there is an issue with NUP3125WTT3G, 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 NUP3125WTT3G part is unused and in its original packaging.
Return procedure for NUP3125WTT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NUP3125WTT3G 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
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
