Low tension fuse switch is designed and manufactured according to IEC60947-3,OFS-4A5 is single pole and single throw switch type.It is non-enclosure fuse switch which suitable for outdoor installation.They are available for low tension HRC fuse that accordance to IEC60269-2-1 series section I-Fuse with fuse link with blade contacts size0,1,2 and Section II-Fuse with fuse link for bolted connection size B0,B1,B2,B3,B4,It is utilization categories AC-22B that mean it can switching on mixed resistive and inductive load,including moderate overload.OFS-4A5 is suitable for installation on cross-arm 100*100mm cross-section,in horizontal underhung position.