Surface mountable electrical device comprising a PTC and fusible element

A device for protecting an electrical circuit comprising:

• a PTC element having a first and a second surface connected to a first and a second side wall;
• a first electrode disposed on the first surface of the PTC element and a second electrode disposed on the second surface of the PTC element;
• a first end termination wrapping around the first side wall of the PTC element and providing electrical connection between the circuit and the second electrode;
• a first electrically insulating layer disposed on the first electrode;
• a fusible element disposed on the first insulating layer, the fusible element electrically connected in series with the PTC element;
• and
• a second end termination wrapping around the second side wall of the PTC element and providing electrical connection between the fusible element and the circuit.

A device for protecting an electrical circuit comprising:

• a conductive polymer PTC element having a first and a second surface and a first and a second side wall;
• a first electrode in electrical contact with the first surface of the PTC element and a second electrode the second surface of the PTC element;
• a first end termination disposed on the first side wall of the PTC element and electrically connecting the circuit and the first electrode;
• a second end termination disposed on the second side wall of the PTC element and electrically connecting the second electrode and the circuit;
• and
• an electrically insulating layer disposed on the first and second electrodes and creating a physical barrier between the second end termination and the first electrode and a physical barrier between the first end termination and the second electrode.

An electrical device for protecting a circuit comprising:

• a conductive polymer PTC element having a first and a second surface and a first and a second side wall;
• a first electrode in electrical contact with the first surface of the PTC element and a second electrode in electrical contact with the second surface of the PTC element;
• a first end termination disposed on the first side wall of the PTC element and providing an electrical connection between the circuit and the first electrode;
• a fusible element electrically connected in series with the PTC element;
• and
• a second end termination disposed on the second side wall of the PTC element and providing an electrical connection between the fusible element and the circuit.