Arrestor covers the audio band for such applications as telephone trunk line protection. Accommodates data/voice, battery and ringing voltages. Turns on at 210 Vdc. It's multi-stage, solid state design makes it multi-strike capable. Surge rated to BELLCORE 1089, 10/1000 USEC @100a. UL497B listed. Handles wire sizes from 16 to 28 AWG (screw terminal connectors). Flange mounts on or near equipment. RoHS Compliant.