M12 Power Connectors & Cable Assemblies Phoenix Contact M12 Power Connectors and Cable Assemblies are coded to prevent mismating with signal connectors and connectors with differing voltages. These connectors provide a robust watertight connection for high-power in AC or DC voltages. Phoenix Contact M12 Power Connectors and Cable Assemblies are available with PCB connectors, cable connectors, and single-ended cable assemblies.