BUSSMANN ECSR80 NSNBC01 Fuse

The ECSR80 is an 80 A UL Class RK-5 time-delay fuse from Bussmann (Eaton) designed for current-limiting protection of 600 V circuits. It features a cylindrical body with knife-blade terminals and is part of the RK-5 family, offering time-delay protection to withstand brief inrush currents while providing fast fault clearing. Rated at 80 A and 600 V AC, the ECSR80 is suited for low-voltage power distribution and industrial applications where reliable interruption of overcurrent events is required. The RK-5 designation refers to its current-limiting and time-delay characteristics, making it a common choice for equipment protection in control panels and other 600 V installations where transient surges occur. Manufactured by Bussmann under the Eaton-Bussmann brand, the ECSR80 combines robust construction with documented performance for overcurrent protection in harsh environments, and is commonly found in 600 V installations such as control panels and power distribution gear protected by RK-5 devices.