varistor products ?2010 littelfuse, inc. revision: january 10, 2011 sm7 series varistor surface mount varistors > sm7 series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/sm7.html for current information. sm7 series rohs description the littelfuse sm7 series is a plastic-encapsulated surface-mount metal oxide varistor (mov) transient voltage surge suppressor that is designed to be operated continuously across ac power lines. the series comprises a nylon molded package with tin plated lead frame for soldering to board. the surface mount sm7 series is based on radial 7mm internal varistor element with similar characteristics to the littelfuse la / za series of varistor. features t & |