A busbar is a stiffener that has been dielectrically coated. Therefore it has all of the qualities found in a stiffener with the added benefit of being able to carry ground and power distribution up to 128 amps, thus eliminating the need for heavy traces. Used in electrical power distribution, a busbar (also spelled bus bar, buss bar, or bussbar) is a metallic strip or bar that conducts electricity within a distribution board, circuit board, battery bank, power supply unit, or other electrical apparatus.
Typically made of copper or brass, its main purpose is to conduct a substantial current of electricity, more than can be provided by standard power and ground traces. This is possible due to the busbar being powder coated with a dielectric coating with a hiPot of 2000 volts.