An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be_____? August 9, 2021March 2, 2018 by admin An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be_____? A. 1500 A. B. 6000 A.C. 2121.32 A. D. 4242.64 A.