Influence of geometry, solder position and volume on the fusing time of silver fuse elements with tin solder at low overcurrents in low-voltage power fuses

Research output: Contribution to conferencesPaperContributedpeer-review


In the electric power system, low-voltage power fuses with silver fuse elements and tin solder are widely used because of their simple and cost-effective work principle. Due to new applications and technical requirements e.g. in renewable energy systems and battery storages, a more precise switching characteristic is needed. Especially at low overcurrents the time-current-characteristic has a high volatility. Therefore, specific design rules for the geo-metric parameters of the fuse element need to be developed. In this paper, different geometries of the constrictions combined with different volumes of the solder were examined. Especially the length and height of the solder and its position at the fuse element were varied. The switching behavior of the fuse element was calculated with FEM, and tested at low overcurrents with the requirements of the actual gPV standard at the nominal current In and the conventional currents Inf = 1,13 In and If = 1,35 In. Main influences on the switching time are determined in this investigation, facilitating an optimization of the fuse elements using FEM-software.


Original languageEnglish
Number of pages7
Publication statusPublished - 14 Jun 2022


Title31. International Conference on Electrical Contacts
Abbreviated titleICEC
Conference number
Duration13 - 16 June 2022
Degree of recognitionInternational event

External IDs

ORCID /0000-0002-4793-8800/work/150330515


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