Provided is a power relay assembly. The power relay assembly comprises: a support plate having at least one electrical element mounted on one surface thereof and including a plastic material having a heat dissipation property and insulation property; at least one bus bar electrically connected to the electrical element; and an electromagnetic wave shielding unit for shielding electromagnetic waves generated from the electrical element.

Provided is a circuit structure having a novel structure that allows heat from a heat-generating component to be dissipated more efficiently. A circuit structure includes: heat-generating components that generate heat when energized; energization bus bars that are connected to connection portions of the heat-generating components; and heat transfer portions that are provided in the energization bus bars and that are in heat-conductive contact with a heat-dissipating body, wherein the heat transfer portions are in heat-conductive contact with the heat-generating components.

A contactor includes a housing defining a cavity. The contactor includes a switch assembly received in the cavity. The switch assembly includes first and second fixed contacts received in the cavity and a movable contact movable within the cavity between a mated position and an unmated position. The movable contact engages the first and second fixed contacts to electrically connect the first and second fixed contacts in the mated position. The switch assembly includes a coil assembly in the cavity operated to move the movable contact between the unmated position and the mating position. The contactor includes a heat transfer device coupled to the housing. The heat transfer device is thermally coupled to the first fixed contact and the second fixed contact to dissipate heat from the first fixed contact and the second fixed contact.

An electromagnetic relay includes a case including a base, a first fixed terminal held by the base, a movable contact piece, a gas inflow space, and a gas passage. The first fixed terminal includes a first fixed contact disposed apart from the base in a first direction inside the case, a contact support portion disposed between the first fixed contact and the base and configured to support the first fixed contact, and a first extending portion extending at an angle from the contact support portion and penetrating the base in the first direction. The movable contact piece includes a first movable contact facing the first fixed contact in the first direction. The gas inflow space is formed between the base and the contact support portion inside the case. The gas passage penetrates the base in the first direction and communicates the gas inflow space with an outside of the case.

An electromagnetic relay includes a case including a base, a first fixed terminal held by the base, a movable contact piece, a gas inflow space, and a gas passage. The first fixed terminal includes a first fixed contact disposed apart from the base in a first direction inside the case, a contact support portion disposed between the first fixed contact and the base and configured to support the first fixed contact, and a first extending portion extending at an angle from the contact support portion and penetrating the base in the first direction. The movable contact piece includes a first movable contact facing the first fixed contact in the first direction. The gas inflow space is formed between the base and the contact support portion inside the case. The gas passage penetrates the base in the first direction and communicates the gas inflow space with an outside of the case.

A relay structure includes a case; a magnetoelectric assembly; a first leg and a second leg assembled with two ends of the magnetoelectric assembly, respectively, a magnetic conduction assembly having an end electrically connected to the magnetoelectric assembly in a normal condition, and when the magnetoelectric assembly produces electromagnetism, the magnetic conduction assembly is magnetically attracted to and abutted with other end of the magnetoelectric assembly; a driving plate assembled with the top surface of the magnetic conduction assembly; an armature assembly including conductive plates stacked with each other, and having an end bonded with a third leg, and other end extended toward the driving plate and formed with a conductively connecting member, a top end of the driving plate is inserted through the armature assembly; a fourth leg having an end disposed inside the case and formed with a contact member above the conductively connecting member.

A relay structure includes a case; a magnetoelectric assembly; a first leg and a second leg assembled with two ends of the magnetoelectric assembly, respectively, a magnetic conduction assembly having an end electrically connected to the magnetoelectric assembly in a normal condition, and when the magnetoelectric assembly produces electromagnetism, the magnetic conduction assembly is magnetically attracted to and abutted with other end of the magnetoelectric assembly; a driving plate assembled with the top surface of the magnetic conduction assembly; an armature assembly including conductive plates stacked with each other, and having an end bonded with a third leg, and other end extended toward the driving plate and formed with a conductively connecting member, a top end of the driving plate is inserted through the armature assembly; a fourth leg having an end disposed inside the case and formed with a contact member above the conductively connecting member.

A power relay assembly is provided. A power relay assembly according to an exemplary embodiment of the present invention comprises: an upper case having at least one electric element mounted on one surface thereof; a lower case coupled to the upper case; and at least one bus bar electrically connected to the electric element, disposed between the upper case and the lower case, and including a bottom portion that is in surface contact with at least one of the upper case and the lower case, wherein at least one side of the bottom portion contacts a portion made of a plastic material having heat dissipation and insulation properties in the upper case and the lower case.

A contact device of the present disclosure includes a fixed terminal, a movable member, a regulating member, and a heat transmission structure. The fixed terminal includes a fixed contact. The movable member includes a movable contact and is configured to move between a closed position where the movable contact is in contact with the fixed contact and an open position where the movable contact is apart from the fixed contact. The regulating member is configured to be in contact with the movable contact when the movable member is in the open position. The heat transmission structure is configured to transmit, to the fixed terminal, heat from the movable contact when the movable member is in the open position, through a thermal path including at least the regulating member.

A contact device of the present disclosure includes a fixed terminal, a movable member, a regulating member, and a heat transmission structure. The fixed terminal includes a fixed contact. The movable member includes a movable contact and is configured to move between a closed position where the movable contact is in contact with the fixed contact and an open position where the movable contact is apart from the fixed contact. The regulating member is configured to be in contact with the movable contact when the movable member is in the open position. The heat transmission structure is configured to transmit, to the fixed terminal, heat from the movable contact when the movable member is in the open position, through a thermal path including at least the regulating member.