Mersen PC73UD13C315TF / J300503 Protistor Size 73 aR High-Speed Fuse, 315A, 1250VAC

The Mersen PC73UD13C315TF (Reference Number: J300503) is an ultra-fast acting Protistor® square body fuse-link, specifically engineered for the high-performance protection of semiconductor devices such as diodes, thyristors, and IGBTs. Part of the size 73 aR series, this fuse is designed to handle demanding power conversion environments with 1250V IEC and 1300V UL ratings. It is constructed with pure silver die-cut elements embedded in solidified sand to ensure precise arcing control, providing extremely low I²t and high interrupting ratings. This model features the Type TTF mounting style with tapped terminals (M12) for secure electrical and mechanical integration into industrial power systems.