Bussmannn fnq r 600v ac 1 15a 381mm time delay fuses bussmann fnq r 30 this time delay fuse from bussmann has been designed to meet the needs of control circuit transformer protection compatible with inrush characteristics of small control transformers the fuse also has current limitation at class cc levels providing maximum component short circuit current rating protection other features include the 200ka interrupting rating provides high ratings for control circuit locations while