Power supply unit and the electrical / electronic communication is connected between the equipment to electrical / electronic communication devices of the power input terminal of the power distribution unit that separately fed into the self-(shelf) and the fuse and a power output stage for the power to be drawn from the power supply bus lowering the noise reduction and the impedance meurosseo state interconnects using bar fast data rate, and a power distribution unit is disclosed having a bus bar that is to be well ventilated to perform a stable power supply. The housing of the power distribution unit is contained in the front and back panels, and left and right panels and comprised of the upper and lower panels have a form of a rectangle, and that power from an external power supply applied to the power input terminal and a power supplied through the power input terminal fuse is installed at a noise filter and a circuit switch for removing noise on one side of the housing and connected to the circuit switch which is and provided on the front panel, to the external power output terminal for outputting a power supply and mounted on the rear panel, rapidly dissipate heat generated therein to free up space in the interior of the housing by a ventilation fan by providing vertically to the warning sound generating portion rear panel for generating an alarm when the abnormality occurs in the power distribution units on one side sikimeuroseo power distribution to thereby improve the durability of the device.
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