Underwriters Laboratories Authorizes Class CF Fuse and Fuse Holder
The CUBEFuse system had been previously designated as “Special Purpose” Listed Class J. The new Class CF listing removes the "Special Purpose" category and its unique marking as well as removes confusion in the industry over whether the CUBEFuse can be used where a “Listed” fuse is required.
The new Class CF is the first class with Peak Current Let-Through Curves in the standard. These curves cover the range of currents from 25kA to 300kA, and allow users to pick any available current they want. This same concept is working its way through the standards process for Class J, L and RK1.
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