Panel Mount Fuse Holder-H3-12B
The voltage rating of a fuse-holder is governed by a number of design aspects like the distance between terminals, creepage distances and minimum clearance distances. Further aspects of insulation coordination as specified in IEC 664/664A have an influence on the voltage rating. In general a fuse-holder will perform satisfactory at any voltage equal to or lower than the rated voltage. As a remark the existing standard IEC 257 will be replaced by a fully revised standard, viz IEC 127, part 6.