Mersen A065UD32LI1100 Protistor Fuse, 1100A 690V AC, Size 32 aR, High-Speed Square Body with LI Bolted Contacts - Pack of 3

The Mersen Protistor® A065UD32LI1100 (Item Number K219787) is a high-capacity, ultra-fast acting square body fuse-link engineered for the rigorous protection of semiconductor power devices. With a high rated current of 1100A and a voltage rating of 690V AC (IEC), this Size 32 aR class fuse is designed to meet the demands of heavy industrial systems. It is ideally suited for protecting power rectifiers, large-scale inverters, and high-performance AC/DC motor drives where minimizing let-through energy (I²t) and peak current limitation is critical to preventing damage to sensitive components like thyristors and IGBTs.

Constructed for high reliability, the A065UD32LI1100 features a premium ceramic body and silver-plated copper LI-style (Bolted Blade) terminal contacts, ensuring optimal electrical contact and efficient heat dissipation. The internal structure uses pure silver elements embedded in high-purity silica sand to provide rapid arc quenching and a high breaking capacity of 200kA. This unit includes an integrated Type K mechanical striker, allowing for both local visual indication and the mounting of auxiliary microswitches for remote status signaling.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: A065UD32LI1100
• Item Number: K219787
• Amperage Rating: 1100A
• Voltage Rating: 690V AC (IEC) / 700V AC (UL)
• Interrupting Rating (Breaking Capacity): 200kA at 690V AC
• Operating Class: aR (Ultra-Fast Acting)
• Product Size: 32
• Mounting Configuration: LI (Bolted Blades)
• Indication System: Integrated Mechanical Striker (K-Type)
• Pre-arcing I²t: 500 kA²s
• Total Clearing I²t at Rated Voltage: 3,400 kA²s
• Power Dissipation at Rated Current: 160W
• Standards Compliance: IEC 60269-4, UL 248-13 Recognized, RoHS Compliant
• Quantity: Pack of 3