Mersen H300065 PC32UD69V400TF Protistor Fuse, 400A 690V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® PC32UD69V400TF (Item H300065) is a high-performance, ultra-fast acting square body fuse-link engineered for the ultimate protection of power semiconductor devices. This Size 32 aR class fuse is designed to safeguard diodes, thyristors, and IGBT modules in power conversion equipment, including industrial inverters, motor drives, and UPS systems.

Built with a high-strength ceramic body and silver-plated contact surfaces, the fuse features die-cut elements encapsulated in high-purity solidified sand. This internal architecture provides precise arcing control, ensuring extremely low I²t clearing values and a superior breaking capacity of 200kA. This model comes equipped with a mechanical indicator (striker) for visual trip detection or to trigger an external microswitch. The TTF flush-end M10 metric threaded terminals provide a low-resistance and compact bolted connection for rugged industrial environments.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: PC32UD69V400TF
• Item Number: H300065
• Amperage Rating: 400A
• Voltage Rating: 690V AC (IEC) / 700V AC (UL)
• Interrupting Rating (Breaking Capacity): 200kA AC
• Operating Class: aR (Ultra-Fast Acting / Semiconductor Protection)
• Product Size: 32
• Mounting Configuration: Flush-End M10 Threaded Terminals (TTF)
• Indication System: Integrated Mechanical Striker
• Pre-arcing I²t: 15 kA²s
• Total Clearing I²t at Rated Voltage: 90 kA²s
• Power Dissipation at In: 72W
• Standards Compliance: IEC 60269-4, UL/CSA Recognized E76491, RoHS Compliant
• Quantity: Pack of 3