Reliance Electric ECSR-125 N 125A 600V CL RK5 S Circuit Breaker

ECSR125 is a 125 A dual-element, time-delay Class RK5 fuse from the Edison fuse family (often cataloged under the Reliance/Baldor lineage) rated for 600 V AC. It uses blade-end terminals and a fiberglass body, with dimensions of about 1.61 inches in diameter by 9.63 inches long, and mounts in a blade-end holder. The fuse carries a 200 kAIC interrupt rating and is non-indicating; it is designed as a current-limiting, time-delay device to protect motors, transformers, and other inductive loads against short circuits and surge currents, while enabling selective coordination with upstream devices. The ECSR125 is a member of the RK5 class fuses and is specified for 600 V operation, making it suitable for industrial power distribution and feeder/branch protection where time-delay capability is beneficial. MFG part: ECSR125; Series: ECSR; Type: current-limiting, time-delay fuse.