Sylvania 300A-KD Assembly Arc Shield Bull 7400 Kit 301

Sylvania 300A-KD Assembly Arc Shield Bull 7400 Kit 301 is a replacement arc shield head assembly designed for Clark/Challenger/Joslyn Bulletin 7400 contactors in the 300 A KD/KS family. The KD and KS designations, together with Bulletin 7400, identify 300 A class DC contactors whose replacement parts are cataloged against the 7400 series; reputable catalogs list replacement arc shields and head assemblies for 300 A KD/KS units, including references to a KKD-300 replacement kit for Clark/Challenger/Joslyn 7400 KD/KS devices. Kit 301 is the specific arc shield configuration used with 300 A KD/KS units. As an arc shield assembly, this part serves as the protective shield around the switching contacts within the head assembly, a common component in 7400-series devices used in industrial control panels and power distribution equipment that rely on 300 A class contactors. It is associated with legacy Clark/Challenger/Joslyn/Sylvania labeling for Bulletin 7400 KD and KS contactors rated up to 300 A, which are documented in replacement part catalogs and vendor listings for 7400 KD/KS assemblies.