Mersen PC32UD45V1800TF Protistor Fuse, 1800A 450V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® PC32UD45V1800TF (Item Number E302178) is a specialized high-power ultra-fast acting square body fuse-link, designed for the advanced protection of semiconductor devices. This Size 32 aR class fuse is engineered to provide reliable short-circuit protection for high-current applications including industrial rectifiers, large motor drives, and power converters where sensitive components like diodes and thyristors require exceptionally low I²t let-through energy.

The fuse features a high-grade ceramic body and silver-plated copper contacts for optimized electrical conductivity and thermal performance. It utilizes pure silver elements and high-purity sand filler to ensure a high breaking capacity of 200kA. For monitoring and maintenance, it comes equipped with a Type T mechanical striker, providing visual indication or integration with an optional microswitch for remote fault detection. The TTF flush-end M10 metric threaded construction allows for a direct, low-resistance bolted connection to industrial busbar systems.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: PC32UD45V1800TF
• Item Number: E302178
• Amperage Rating: 1800A
• Voltage Rating: 450V AC (IEC) / 500V AC (UL)
• Interrupting Rating (Breaking Capacity): 200kA at 450V AC
• Operating Class: aR (Ultra-Fast Acting)
• Product Size: 32
• Mounting Configuration: Flush-End M10 Metric Threads (TTF)
• Indication System: Integrated Mechanical Striker (Type T)
• Pre-arcing I²t: 1900 kA²s
• Total Clearing I²t at Rated Voltage: 6800 kA²s
• Power Dissipation at Rated Current: 200W
• Standards Compliance: IEC 60269-4, ASRE Recognized, RoHS Compliant
• Quantity: Pack of 3