ECNR500 is an Edison Class RK5 time-delay, current-limiting fuse rated for 500 A and 250 V AC (also listed for 125 V DC) in Eaton’s ECNR family. It uses dual-element construction and blade-terminal interfaces for easy insertion in panel boards and switchgear, and it is UL/CSA recognized with an interrupt rating up to 200 kAIC. With a 10-second time delay at 500% of rated load, it accommodates motor inrush and startup conditions, making it suitable for branch and feeder protection in industrial power-distribution applications such as AC drives, load centers, and non-inductive loads.
