Electronic fuses

Bourns Electronics has for some time marketed aseries of circuit breakers that, in a number of applications, form good alternatives to the usual glass fuses. Known as Multi-Fuse, the devices are similar in their basic characteristics to positive temperature coefficient (PTC) resistors made from doped barium titanate ceramies, but are of a totaUy different construction based on conductive polymer composite materials. An important advantage of the Multi-Fuse is that after it has been tripped by an overload it needs only a short period after the overload has been removed to regain its normal operational characteristics.