The Littelfuse Industrial PSR073FS0450Z is a Powr-Speed Sqb Size 73 flush mount fuse with a high current rating of 450A. This industrial-grade fuse is designed for applications that require reliable overcurrent protection in a compact size. With its flush mount design, this fuse is easy to install and provides efficient protection for industrial equipment and machinery. Trust Littelfuse Industrial for high-quality, high-performance fuses for your industrial applications.