NCN Series MCBs 20A, 4Pole / Four Pole / FP 4 Modules C curve MCB (trips at 5-10 x Ir) Breaking Capacity: 10kA AC Operating Voltage: 415V AC Offers both Overaload and Shortcircuit protection Conforms to IS/IEC 60898-1-2002 & IEC 60898-1995;IEC 60947-2 Typically used for commercial or industrial applications where there could be higher chances of short circuit currents