ELECTRICAL JUNCTION BOX

摘要

[Problem] To provide an electrical junction box able to prevent a metal core substrate from being upsized, and to prevent the metal core substrate from being bent. [Means for solving problem] An electrical junction box 10 for distributing electric power in a vehicle includes: a metal core substrate 1 provided with a core metal assembly 2 having two core metal plates 2a, 2b arranged with a gap 3, and an insulating layer embedded in the gap 3 and covering surfaces of the metal core plates 2a, 2b to integrate the metal core plates 2a, 2b; and electronic components 7, 9. Electric power from a battery is inputted into the core metal plate 2a, and electric power from an alternator is inputted into the core metal plate 2b. The electronic components 7, 9 are provided with a plurality of attaching portions 71, 74, 91, 94 soldered or screwed to the metal core substrate 1. At least one of the attaching portions 71, 74, 91, 94 is attached to the core metal plate 2a, and at least one of the attaching portions 71, 74, 91, 94 is attached to the core metal plate 2b.