Industrial ECSR300 Fuse

ECSR300 is an Edison Class RK5 current-limiting fuse rated for 300 A at 600 VAC, designed for feeder and branch protection in electrical distribution. This dual-element, time-delay fuse uses a cartridge-style body with knife-blade terminations on both ends and delivers up to 200 kAIC interrupting capability, making it suitable for circuits with high inrush or short-term overloads. The device measures about 11.63 inches long with a 2.34 inch width (59.4 x 295.4 mm) and features blade-end connections; it is intended for protection of feeders and branch circuits in low-voltage power systems. The ECSR300 is UL listed (File E162363) and CSA certified (File 700489), supporting use in North American electrical installations; it is manufactured in Mexico and has a shipping weight of roughly 2.34 lb. In practice, it provides current-limiting, time-delay protection for loads where accurate short-circuit interruption and reliable coordination with upstream devices are required.