Mersen PC73UD13C350TF / K300504 Protistor Size 73 aR High-Speed Fuse, 350A, 1250VAC

The Mersen PC73UD13C350TF (Item Number: K300504) is an ultra-fast acting Protistor® square body fuse-link designed for the superior protection of power semiconductors such as diodes, thyristors, and IGBT devices. Engineers specify this Size 73 aR class fuse for its exceptionally low I²t and high interrupting rating, which ensures rapid isolation of fault currents in power conversion equipment. Constructed with pure silver die-cut elements and silver-plated contact surfaces, it provides high reliability and superior cycling capability. This model features the TTF tapped terminal mounting style, typically utilized in high-voltage inverters, motor drives, and heavy-duty UPS systems.