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NUP2105LT1G

ONNUP2105LT1G

onsemi
44V Clamp 8A (8/20µs) Ipp Tvs Diode Surface Mount SOT-23-3 (TO-236)
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Overview

The NUP2105LT1G is a dual bidirectional TVS diode array specifically designed to protect CAN transceiver lineups from ESD, EFT, and lightning-induced surge transients. It provides a compact SOT-23 solution for safeguarding the differential CAN_H and CAN_L lines in automotive and industrial networking environments.

Why Choose This Part

This device offers a high peak pulse power rating of 350W and a low reverse leakage current of less than 100nA, ensuring minimal impact on bus idling. Its low capacitance of 30pF is optimized for high-speed CAN data rates while maintaining signal integrity across the differential pair.

Applications

CAN Bus Protection
Protects ISO 11898-2 physical layer transceivers against system-level transients in automotive networks.
Industrial DeviceNet
Provides robust transient voltage suppression for automation networks requiring high reliability in harsh EMI environments.
Smart Grid Systems
Used in power distribution monitoring equipment to protect communication interfaces from electrical fast transients.

Key Specifications

Type Zener
Mounting Type Surface Mount
Package / Case TO-236-3, SC-59, SOT-23-3
Power - Peak Pulse 350W
Operating Temperature -55degC ~ 150degC (TJ)
Power Line Protection No
Bidirectional Channels 2
Capacitance @ Frequency 30pF @ 1MHz
Supplier Device Package SOT-23-3 (TO-236)
Voltage - Breakdown (Min) 26.2V
Voltage - Clamping (Max) @ Ipp 44V
Current - Peak Pulse (10/1000us) 8A (8/20us)
Voltage - Reverse Standoff (Typ) 24V (Min)

Getting Started

When laying out the PCB, place the NUP2105LT1G as close to the CAN connector as possible to minimize parasitic inductance during a surge event. Ensure the ground pin (Pin 3) is connected to a low-impedance ground plane using multiple vias if possible to effectively shunt transients.

Also Consider

SN65HVD230 TITexas Instruments - An 3.3V CAN transceiver that often requires external TVS protection like the NUP2105 for robust field deployment.