1. IPC-2221 8.2.13 Bus Bar Bus bars are usually in the form of preformed components that are part of the printed board assembly and serve the function of providing most, if not all, of the power and ground distribution over the board surface. Their use is primarily to minimize the use of board circuitry for power and ground distribution and/or to provide a degree of power and ground distribution not cost- effectively provided by the printed board.

2. IPC-2221 8.2.13 Bus Bar The number of conductor levels in the bus bar, the type and number of their terminals, the size and finish of their conductors, and the dielectric strength of their insulation depends on the application. However, these parameters should be clearly defined on the procurement document for these parts.

3. IPC-2221 8.2.13 Bus Bar Whenever possible, their interface with the printed board should be at plated-through holes, while conforming to conventional lead size-to-hole and lead bending requirements (see 8.1.11). Also, for optimum board design efficiency, the bus bar terminals should interface with the board on a uniform termination pattern, may share the same holes as an integrated circuit and may be placed under an integrated circuit.