Mechanical fuse device

A fuse device, comprising:

• a housing;
• internal components, said internal components comprising:
• fixed contacts electrically isolated from one another, said fixed contacts at least partially surrounded by said housing;
• one or more moveable contacts, said one or more moveable contacts allowing current flow between said fixed contacts when said one or more moveable contacts are contacting said fixed contacts;
• an internal pin component connected to said one or more moveable contacts, said internal pin component biased toward a position that moves said one or more moveable contacts out of contact with said fixed contacts;
• and
• a pin retention structure configured to hold said internal pin component in place such that said one or more moveable contacts are contacting said fixed contacts;
• contact structures electrically connected to said internal components for connection to external circuitry;
• and
• a pyrotechnic feature configured such that when a threshold current level passes through said internal components, said pyrotechnic feature activates and exerts a pushing force on said pin retention structure, such that said pin retention structure changes configuration, which causes said internal pin component to move according to its bias.

A fuse device, comprising:

• a housing comprising a pyrotechnic feature sub-housing connected to a main housing;
• moveable and fixed contacts, said moveable and fixed contacts configured to change the state of said fuse device between a closed state allowing current flow through the device and an open state which interrupts current flow through the device;
• a retention structure to hold said movable contact in said closed state;
• contact structures electrically connected to said fixed contacts for connection to external circuitry;
• and
• pyrotechnic features, said pyrotechnic features comprising a pyrotechnic charge and a piston structure;
• wherein said pyrotechnic features are at least partially within said pyrotechnic feature sub-housing and wherein said pyrotechnic feature sub-housing is configured such that said piston structure is a least partially expelled from said pyrotechnic feature sub-housing when a threshold current level passes through said internal components and said pyrotechnic charge activates, wherein said at least partially expelled piston structure strikes said retention structure which causes said internal components to transition said fuse device to said open state.