Mersen A050UD32TTI1800 Protistor Fuse, 1800A 500V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® A050UD32TTI1800 (Item Number Z300448) is a premium ultra-fast acting square body fuse-link, specifically engineered for the high-demand protection of power semiconductor devices. This Size 32 aR category fuse is tailored for large-scale industrial systems, including high-power rectifiers, heavy-duty DC drives, and large-capacity energy storage converters. It is designed to minimize I²t let-through energy, providing essential short-circuit protection for sensitive semiconductors such as thyristors and diodes.

Constructed with a high-strength ceramic housing for superior thermal stability, the fuse features silver-plated copper mounting terminals to ensure optimized electrical contact and low power dissipation. The internal design utilizes high-purity silver elements and specialized silica sand to facilitate rapid arc quenching and maintain a high breaking capacity of 200kA. The TTI flush-end interface with M10 metric threads allows for a robust, space-saving bolted connection. This model is equipped with a Type I mechanical striker, allowing for immediate visual diagnostics of a blown fuse and compatibility with microswitches for remote system monitoring.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: A050UD32TTI1800
• Item Number: Z300448
• Amperage Rating: 1800A
• Voltage Rating: 500V AC (IEC) / 500V AC (UL)
• Interrupting Rating (Breaking Capacity): 200kA at 500V AC
• Operating Class: aR (Ultra-Fast Acting)
• Product Size: 32
• Mounting Configuration: Flush-End M10 Metric Threads (TTI)
• Indication System: Integrated Mechanical Striker (Type I)
• Pre-arcing I²t: 1850 kA²s
• Total Clearing I²t at Rated Voltage: 10500 kA²s
• Power Dissipation at Rated Current: 245W
• Standards Compliance: IEC 60269-4, UL Recognized, RoHS Compliant
• Quantity: Pack of 3