Class B+C lightning cum switching surge protectors are the most upgraded version of surge protection devices comes into zone from LPZ 0-2 combining 10350 µs and 820 µs. This protection device is specifically designed for highly sensitive ac power applications from both lightning and switching surges. This dual protection class is a combination of above mentioned classes class B & class C, resulting into high protection level. Complying IEC 61643-1 & UL 1449 standards, Class C SPD are based on the equipment coming under LPZ 0-2 for single phase & three phase line.