Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Mitsuaki Kohsaka

Seiji Takahashi

Manabu Hashikura

Tatsuya Shimizu

Yutaka Higuchi

An electric junction box having a casing and a circuit structure accommodated in the casing. The circuit structure includes a plurality of first bus bars arranged at intervals and synthetic resin members disposed between the adjacent first bus bars and firmly attached to the first bus bars. The synthetic resin members have heat conductivity higher than that of air. Since the heat generated from the first bus bars during electrical connecting can be transmitted to the synthetic resin members, the electric junction box can be prevented from being locally heated to a high temperature.

Electric connection box

An electric connection boxcomprises an FETfor connection with a power supply B, a substrate side conduction pathconnected with the FETand connecting the FETwith a load L, a diode element D connected with the substrate side conduction pathelectrically and to transfer heat and having a PN junction, and a CPUfor judging whether the voltage drop value between the input/output terminalsandof the diode element D is larger than a threshold or not and delivering an off-command signal to the FETif a judgment is made that the voltage drop value is smaller than the threshold.

Circuit protector and electric connection box

Growing community of inventors

Yokkaichi, Japan

Mitsuaki Kohsaka