The fuses are in a standard 200 amp Class J form factor and meet the electrical tests for the new IEC photovoltaic fuse standard 60269-6.
The SPFJ 70–450 amp fuses are designed for global applications to provide protection in array-combiners and inverters in photovoltaic and concentrated photovoltaic systems up to 1000V. The fuses are smaller and more energy efficient than similar alternatives currently in the market, and are designed for a variety of holders including stud-to-stud, fuse clip-to-box lug, and a soon-to-be-released fuse clip-to-stud holder for easy replacement.
The company also released a new patent-pending SPFI in-line fuse for string protection. The SPFI is listed to UL2579 and meets the electrical performance requirements of IEC 60269-6. The SPFI fuse is a 3.5 amp
fuse designed for integration into solar cables for protection of solar strings connecting combiner boxes and panels. The first in a line of fuses up to 20 amps, the SPFI fuse features the same protection and reliability currently found in Littelfuse SPF and KLKD string-protection fuses of which millions of units have been installed globally. The SPFI is less than 44 mm in length and 10.3 mm in diameter and is designed to be over-molded into electrical cable for 1000 VDC solar installations.
The SPFJ Series and SPFI are part of a comprehensive offering of circuit protection products including fuses, relays and TVS diodes that Littelfuse offers for protection of solar installations. All of these products are featured in the new Solar Products Catalog and on the Littelfuse website.