A dual - element fuse may contain a metal strip that melts instantly on a short - circuit .
A dual - element fuse also contain a low - melting solder joint that responds to long - term overload of low values compared to a short - circuit .
A dual - element fuse may contain a metal strip that melts instantly on a short - circuit , and also contain a low - melting solder joint that responds to long - term overload of low values compared to a short - circuit .