To miniaturize an electronic unit by improving mounting flexibility of a power supply control system.

By mounting a switching device 110a with current vibration type interrupt function that is a hard complete type with one chip without requiring a microcomputers, etc., and controls power supplying to various loads onto a wiring harness, mounting freedom of a power supplying control system is improved. Furthermore, since the switching device 110a with current vibration type interrupt function does not need to be mounted on a board inside an electronic unit, the electronic unit is miniaturized.