Mersen A065UD32TTI1100 Protistor Fuse, 1100A 650V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® A065UD32TTI1100 (Item Number V300444) is a professional-grade ultra-fast acting square body fuse-link, specifically engineered for the high-current protection of power semiconductor devices. This Size 32 aR class fuse is designed for critical industrial power electronics, including large-scale power converters, high-capacity rectifiers, and industrial UPS systems. Its primary function is to provide advanced short-circuit protection by minimizing I²t let-through energy, effectively safeguarding components such as thyristors, diodes, and SCRs.

The fuse is constructed with a high-strength ceramic body for excellent thermal and mechanical stability. Its silver-plated copper contact surfaces ensure low contact resistance and reduced power loss during operation. For rapid arc extinction, the fuse utilizes pure silver elements encapsulated in high-purity silica sand, supporting a high breaking capacity of 200kA. This model is equipped with a Type I mechanical striker, which provides a visual indication of operation and can trigger a microswitch for remote system monitoring. The TTI flush-end M10 metric threaded design facilitates a high-torque, low-impedance connection directly to busbars.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: A065UD32TTI1100
• Item Number: V300444
• Amperage Rating: 1100A
• Voltage Rating: 650V AC (IEC / UL)
• Interrupting Rating (Breaking Capacity): 200kA at 650V 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: 400 kA²s
• Total Clearing I²t at Rated Voltage: 2700 kA²s
• Power Dissipation at Rated Current: 180W
• Standards Compliance: IEC 60269-4, UL Recognized, RoHS Compliant
• Quantity: Pack of 3