Three-Phase SPDs

Three-phase surge protective devices (SPDs) provide NEC-required protection against transient voltage surges from lightning strikes, current switching, start up, shut down, and power surges. Littelfuse makes three models of Type 1 and Type 2 single-phase SPDs that, respectively, use metal oxide varistors (MOVs), gas discharge tubes (GDTs), or MOVs, TVS diodes, and fuses to handle excess voltage.

Block Diagram

970f8429-1a0b-4b62-94f2-61cbdac8daea

Technology:
Product Series:LVSP
Features:Complements Littelfuse MOVs and AK TVS diodes
Benefits:Designed to survive surges caused by lightning as described in IEC and UL standards

Technology:
Product Series:TMOV, LST
Features:Normally open and normally closed options for remote indication
Benefits:Same footprint for 50kA and 75 kA Imax for same PCB layout (LST)

Technology:
Product Series:CG3
Features:Rugged ceramic-metal construction
Benefits:Surge protection for AC lines

Ask an Expert

Please let us know about your Three-Phase SPDs project to have one of our experts help you find the best Littelfuse solution for your needs.

By selecting “I agree,” you consent to the terms outlined in the Privacy Statement and authorize Littelfuse to process your personal data.