The most common connectors used in energy applications are Rectangular, Card Edge, D-Sub and Headers. Rectangular rack & panel connectors are used in electrical control equipment requiring power and high continuity connections resistant to shock and vibration. Often in applications such as Nuclear Power. Card Edge connectors provide an easy plug-in board solution in backplanes in electrical panels with ease of board replacement in the field. D-sub connectors are well established as a standard for data feeds in panels. Combo d-subs also allow power transfer as well. Headers are used in almost all markets as an economical board to board or wire to board connection.