Bridgewires

Some articles on bridgewire:

Bridgewire
... A bridgewire, bridge wire, or hot bridge wire (HBW) is a relatively thin resistance wire used to set off a pyrotechnic composition serving as pyrotechnic initiator ... After successful firing, the bridgewire melts, resulting in an open circuit ... Some applications also use platinum-silver alloy other bridgewire materials in use are platinum, gold, silver, tungsten, etc ...