Protective element

A protective element comprising:

• an insulation substrate having a resistive layer;
• a fusible conductor mounted on the insulation substrate;
• a first electrode and a second electrode connected to the resistive layer,
• a third electrode arranged on the insulation substrate;
• a fifth electrode connected between the first electrode and the third electrode;
• and
• a first metal formed on the third electrode and the fifth electrode,
• wherein a thickness of the fifth electrode is thinner than a thickness of the third electrode, and
• wherein the fusible conductor is cut off due to heat generated by the resistive layer and a resistance value between the third electrode and the second electrode increases by 10 times or more due to dissolution of the fifth electrode caused by melting of the first metal.

A protective element comprising:

• an insulation substrate having a resistive layer;
• a fusible conductor mounted on the insulation substrate;
• a first electrode and a second electrode connected to the resistive layer,
• a third electrode and a fourth electrode arranged on the insulation substrate;
• a fifth electrode connected between the first electrode and the third electrode;
• a sixth electrode connected between the second electrode and the fourth electrode;
• a first metal formed on the third electrode and the fifth electrode;
• and
• a second metal formed on the fourth electrode and the sixth electrode,
• wherein a thickness of the fifth electrode is thinner than a thickness of the third electrode,
• wherein a thickness of the sixth electrode is thinner than a thickness of the fourth electrode, and
• wherein the fusible conductor is cut off due to heat generated by the resistive layer and a resistance value between the third electrode and the fourth electrode increases by 10 times or more due to at least one of dissolution of the fifth electrode caused by melting of the first metal and dissolution of the sixth electrode caused by melting of the second metal.

A protective element comprising:

• a first terminal and a second terminal arranged apart from each other in a first direction;
• a fuse element arranged between the first terminal and the second terminal to electrically connect the first terminal and the second terminal and configured to fuse when a predetermined electric current or more flows;
• an insulation member arranged to face the fuse element from both sides in a second direction perpendicular to the first direction;
• an insulation case configured to house a part of the first terminal, a part of the second terminal, the fuse element, and the insulation member, wherein an internal pressure buffering space communicating with a space where the fuse element is arranged is formed inside the insulation case;
• and
• a filler arranged in at least a part of the internal pressure buffering space and configured to be in contact with a surface of at least one insulation member opposite a surface facing the fuse element.

A protective element comprising:

• a first terminal and a second terminal arranged apart from each other in a first direction;
• a fuse element arranged between the first terminal and the second terminal to electrically connect the first terminal and the second terminal and configured to fuse when a predetermined electric current or more flows;
• an insulation member arranged to face the fuse element from both sides in a second direction perpendicular to the first direction;
• an insulation case configured to house a part of the first terminal, a part of the second terminal, the fuse element, and the insulation member, wherein an internal pressure buffering space communicating with a space where the fuse element is arranged is formed inside the insulation case, and
• a filter arranged in at least a part of the internal pressure buffering space and configured to be in contact with a surface of at least one insulation member opposite a surface facing the fuse element.

A protective element comprising:

• a first terminal and a second terminal arranged apart from each other in a first direction;
• a fuse element arranged between the first terminal and the second terminal to electrically connect the first terminal and the second terminal and configured to fuse when a predetermined electric current or more flows;
• an insulation member arranged to face the fuse element from both sides in a second direction perpendicular to the first direction;
• and
• an insulation case configured to house a part of the first terminal, a part of the second terminal, the fuse element, and the insulation member, wherein an internal pressure buffering space communicating with a space where the fuse element is arranged is formed inside the insulation case,
• wherein at least one of the insulation member and the insulation case has a carbon material content of less than 0.1 wt %.

A fuse element comprising:

• a first conductive material;
• and
• a second conductive material formed of a material different from that of the first conductive material,
• wherein the first conductive material and the second conductive material are connected in series to each other in a current-carrying direction,
• wherein the first conductive material has a higher electrical resistance than the second conductive material in the current-carrying direction,
• wherein, when viewed in a thickness direction perpendicular to the current-carrying direction, an overlapping part is provided in a part in which the first conductive material and the second conductive material are connected to each other,
• wherein the first conductive material has a shorter length in a width direction perpendicular to the current-carrying direction and the thickness direction in the overlapping part than the second conductive material,
• wherein the second conductive material has at least one corner on an outer side of the overlapping part in the width direction, and
• wherein, when viewed in the thickness direction, at least the one corner has an angle of 100° or less.

A protective element comprising:

• a first conductive material;
• and
• a second conductive material formed of a material different from that of the first conductive material,
• wherein the first conductive material and the second conductive material are connected in series to each other in a current-carrying direction,
• wherein the first conductive material has a higher electrical resistance than the second conductive material in the current-carrying direction,
• wherein, when viewed in a thickness direction perpendicular to the current-carrying direction, an overlapping part is provided in a part in which the first conductive material and the second conductive material are connected to each other,
• wherein the first conductive material has a shorter length in a width direction perpendicular to the current-carrying direction and the thickness direction in the overlapping part than the second conductive material,
• wherein the second conductive material has at least one corner on an outer side of the overlapping part in the width direction, and
• wherein, when viewed in the thickness direction, at least the one corner has an angle of 100° or less.