Maximum current of endure the lightning stroke 20kA (8/20aas). Time of response <25ns. Can ... protection device (in short: SPD, alias: surge suppressor, surge arrester) is suitable for TN-S, TN-C-S, TT, IT ... equipment, operating room, custody, electronic equipment etc. and in the socket box in control equipment. It is also applied for below ... 8 pieces.Model and Meaning NS1-(D, C, B)5 Lightning Arrester