Connection unit (1) comprising an electromagnetic
relay (10) comprising: a housing (11) having a chamber (15) in an interior of the housing (11); a first fixed contact side terminal (12) fixed to the housing (11) and having a first fixed contact portion (121) extending from an outside of the housing (11) into the chamber (15) and disposed in the chamber (15); a second fixed contact-side terminal (13) which is attached to the housing (12) electrically independently of the first fixed contact-side terminal (13) and has a second fixed contact portion (131) which extends from the outside of the housing (11) into the chamber (15) and is arranged in the chamber (15); and a movable contact piece (14) having a plate shape and arranged in the chamber (15), which has a first movable contact portion (141) arranged to face the first fixed contact portion (121) and a second movable contact portion (142) arranged to face the second fixed contact portion (131), and in which the first movable contact portion (141) and the second movable contact portion (142) are movable in a contact / separation direction, bringing them into contact with or separating them from the first fixed contact portion (121) and the second fixed contact portion (131), respectively, wherein the housing (11) has a
busbar installation surface (16) provided on an outer periphery of the housing (11) and on one side of a second plate surface (144) of the movable contact piece (14), the second plate surface (14) being opposite in the contact / separation direction to a first plate surface (143) on which the first moving contact portion (141) and the second moving contact portion (142) of the movable contact piece (14) are provided, wherein the first fixed contact-side terminal (12) has one end on an outer side of the housing (11), the end being positioned on one side of the
busbar installation surface (16) in the contact / disconnection direction and on a
side lying at one end in an arrangement direction connecting the first moving contact portion (141) and the second moving contact portion (142), wherein the connection unit (1) further comprises: a first
bus bar (20) extending on the outside of the housing (11) in the arrangement direction along the
bus bar installation surface (16), overlapping with the movable contact piece (14) in at least a portion of the first
bus bar (20) as viewed from the contact / disconnection direction, and also connected to the first fixed contact side terminal (12) at one end in the arrangement direction at a connection point (21) on the one-end side of the bus bar installation surface (16) in the arrangement direction; a second
busbar (20) which is connected to the second fixed contact-side terminal (13) on the outside of the housing (11) electrically independently of the first busbar (20); and a busbar position
limiter (40) arranged on the busbar installation surface (16) at a distance in the arrangement direction from the connection point (21) and configured to limit a position of the first busbar (20) in the contact / disconnection direction and in a direction away from the busbar installation surface (16).