Mersen PC32UD69V350A Protistor Fuse, 350A 690V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® PC32UD69V350A (Item Number N130108) is an ultra-fast acting square body fuse-link, specifically engineered for the high-performance protection of power semiconductor devices. This Size 32 aR class fuse is designed for 690V AC applications, making it an ideal choice for protecting industrial power converters, motor drives (VFDs), UPS systems, and traction inverters. It provides superior short-circuit protection by significantly limiting the I²t let-through energy, thereby preventing damage to sensitive components such as diodes, thyristors, and IGBTs.

The fuse is constructed with a high-strength ceramic body and silver-plated contact surfaces, ensuring high reliability under harsh thermal and mechanical conditions. Internally, the high-purity silver elements and specialized silica sand filling facilitate rapid arc extinguishment and high breaking capacity. This model is equipped with a mechanical striker, providing an immediate visual indication of a blown fuse and allowing for the integration of a microswitch for remote status monitoring.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: PC32UD69V350A
• Item Number: N130108
• Amperage Rating: 350A
• Voltage Rating: 690V AC (IEC / UL)
• Interrupting Rating (Breaking Capacity): 200kA at 690V AC
• Operating Class: aR (Ultra-Fast Acting)
• Product Size: 32
• Mounting Configuration: Flush-End Metric Threads
• Indication System: Integrated Mechanical Striker
• Pre-arcing I²t: 12.5 kA²s
• Total Clearing I²t at Rated Voltage: 85 kA²s
• Power Dissipation at Rated Current: 72W
• Standards Compliance: IEC 60269-4, UL 248-13 Recognized, CCC
• Quantity: Pack of 3