Mersen PC73UD13C500TF / N300507 Protistor Size 73 aR High-Speed Fuse, 500A, 1250VAC

The Mersen PC73UD13C500TF (Reference Number: N300507) is an industrial-grade Protistor® square body fuse-link designed for the ultra-fast protection of power semiconductors. As part of the Size 73 aR class, this fuse is optimized to protect high-power rectifiers, AC/DC drives, and static UPS systems. It features a high breaking capacity of 126kA at its rated 1250VAC, ensuring rapid isolation of short-circuit faults to safeguard sensitive components like IGBTs and thyristors. The TTF (Tapped Terminal Face) design provides a secure M12 threaded connection, ensuring low contact resistance and excellent thermal management in high-current applications.