Patent ID: 7986212

Claim:
A fuse comprising: a first connecting terminal to be electrically connected to a side of a power source; a second connecting terminal to be electrically connected to a side of a load; a third connecting terminal to be electrically connected to a side of a relay control circuit; a fuse element having one end directly physically connected to the first connecting terminal; a semiconductor relay including a relay circuit configured to switch between a conducting state and a non-conducting state of a connection between a drain electrode and a source electrode of the semiconductor relay according to a control signal inputted to a gate electrode of the semiconductor relay, the drain electrode being electrically connected to the other end of the fuse element and the source electrode being electrically connected to the second connecting terminal, and the gate electrode being electrically connected to the third connecting terminal; and a semiconductor relay driving element configured to output a driving signal to the gate electrode of the semiconductor relay, wherein the semiconductor relay is directly physically mounted on the second connecting terminal, wherein the semiconductor relay driving element is electrically connected to and directly physically mounted on the second connecting terminal and electrically connected to the gate electrode of the semiconductor relay and the third connecting terminal, wherein the first, second and third connecting terminals, the semiconductor relay, and the semiconductor relay driving element are sealed with a mold resin sealing portion to form a first single unit, wherein the fuse element is connected to fuse connecting portions exposed from the mold resin sealing portion of the first single unit, and wherein the mold resin sealing portion of the first single unit, the fuse element, and the fuse connecting portions are housed in a case to form a second single unit as a whole.