Mersen PC73UD95V11CTF / S300514 Protistor Size 73 aR High-Speed Fuse, 1100A, 950VAC

The Mersen PC73UD95V11CTF (Reference Number: S300514) is a high-performance Protistor® square body fuse-link engineered for the ultra-fast-acting protection of semiconductor power devices. This Size 73 aR-class fuse is specifically designed to handle high nominal currents up to 1100A at a rated voltage of 950VAC (IEC 60269-4). It is widely utilized in heavy industrial power electronics, including large traction inverters, AC/DC drives, and high-capacity power supplies where minimal I²t let-through and high breaking capacity are critical for safeguarding thyristors and silicon-controlled rectifiers (SCRs). Featuring a TTF (Tapped Terminal Face) configuration with M12 threading, it ensures a robust, low-impedance connection directly to busbar systems.