Mersen A070UD32TTI700 Protistor Fuse, 700A 700V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® A070UD32TTI700 (Item Number Q300440) is a premium ultra-fast acting square body fuse-link designed for the protection of power semiconductor devices. This Size 32 aR class fuse is engineered for high-power industrial applications, including large rectifiers, inverters, and power converters. It provides superior short-circuit protection by minimizing I²t let-through energy, ensuring the longevity and safety of sensitive electronics such as diodes and thyristors.

Built with a high-grade ceramic body for thermal reliability and silver-plated contact surfaces for high conductivity, the fuse is optimized for heavy-duty cycling. The internal silver elements are surrounded by high-purity sand to ensure rapid arc quenching and a high breaking capacity. This model is equipped with a Type I mechanical striker, allowing for local visual confirmation of a trip or the activation of an external microswitch for remote monitoring. The TTI flush-end M10 metric threaded interface provides a low-inductance, secure bolted mounting for industrial busbars.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: A070UD32TTI700
• Item Number: Q300440
• Amperage Rating: 700A
• Voltage Rating: 700V AC (IEC / UL)
• Interrupting Rating (Breaking Capacity): 200kA at 700V 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: 100 kA²s
• Total Clearing I²t at Rated Voltage: 700 kA²s
• Power Dissipation at Rated Current: 125W
• Standards Compliance: IEC 60269-4, UL Recognized, RoHS Compliant
• Quantity: Pack of 3