Bussmann SPP-4F400 Fuse

The Bussmann SPP-4F400 fuse, part of the Bussmann Semitron SPP family, is a high-current device rated for 400 A with a 700 V maximum voltage. The model designation SPP-4F400 (also listed as SPP4F400) identifies a 400 ampere rating paired with a 700 volt rating, making it suitable for protecting power circuits where fault current and system voltages are substantial. In practical terms, this fuse is used to interrupt excessive current in demanding electrical applications such as power distribution and high‑voltage equipment, where reliable overcurrent protection is required. Verified specifications from product listings center on the 400 A current rating and the 700 V rating, providing a clear basis for matching the fuse to compatible equipment and protection schemes. The SPP-4F400 / SPP4F400 designation appears across distributor catalogs and manufacturer line cards, indicating its place within Bussmann’s high‑current fuse offerings. When incorporating this part into a design, ensure the electrical characteristics align with your system’s protection requirements and that the part number corresponds to the intended Bussmann family.