J BLOCK WITH IND 3 POLE BOX LUG 60A. Indication offered on all versions except 200A-600A DIN Rail releasable for all non-knife blade style fuses. Only one hand is required to release from DIN Rail (lock open lock closed). Phenolic blocks have side barriers for isolation. Spring reinforced fuse clips are standard on 100A and larger blocks. Reinforcing springs are optional on 30A and 60A blocks. Universal mounting holes make for easy replacement Space-saving design — up to 45percent smaller than existing blocks.