UL CLASS RK-5 TIME DELAY

The Bussmann ECSR70 is a dual-element, time-delay fuse designed for AC power distribution system mains, feeders, and branch circuits. It is recommended for applications with inductive loads such as motors and transformers, or non-inductive loads like lighting and heating, provided the available short-circuit current does not exceed 200,000 RMS symmetrical amps.

These fuses feature a time-delay characteristic that allows them to be sized closer to the running ampacity of inductive loads. This helps reduce costs and provides improved overcurrent protection by overriding normal equipment current surges, thereby minimizing unnecessary fuse openings. The ECSR70 offers moderate current limitation and is a popular, economical choice for protecting motors and transformers.