NLS series fuses provide low cost protection for general purpose feeder and branch circuits when available short-circuit currents are less than 50,000 amperes. They replace all Class H fuses which have only a 10,000 ampere interrupting rating. They are suitable for use in many residential and smaller commercial and industrial applications. 600VAC, 400VDC 35-60A, 500VDC 8-30A, 225-600A, 600VDC 1-7A, 70-200A.