Legrand combination arrester for 40 mm busbar system, type 1+2+3/Class I+II+III according to IEC/EN 61643-11, 3+0 circuit, TN-C systems, spark gap basis, leakage current free, nominal voltage 230/400VAC, lightning impulse current Iimp (10/350) 12.5 kA/pole. Highest continuous voltage (Uc) 300 VAC. For use in facilities and buildings with external lightning protection. For protection against overvoltages of downstream consumers caused by direct/indirect lightning strikes or switching operations.