Mersen PC32UD69V550TF Protistor Fuse, 550A 690V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® PC32UD69V550TF (Item L302161) is a high-performance, ultra-fast acting square body fuse-link designed for the protection of power semiconductor devices. This Size 32 aR class fuse provides premium protection for diodes, thyristors, and IGBT modules used in power converters, industrial rectifiers, and large UPS systems.

Engineered with a high-grade ceramic body and silver-plated contact surfaces, the fuse incorporates die-cut elements encapsulated in high-purity solidified sand. This internal construction ensures precise arcing control, exceptionally low I²t clearing values, and a high interrupting rating of 200kA. The model features an integrated mechanical striker (Type T) for visual trip indication or for the actuation of an external microswitch. The TTF flush-end M10 metric threaded terminals allow for a secure, low-resistance bolted connection in compact power electronic assemblies.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: PC32UD69V550TF
• Item Number: L302161
• Amperage Rating: 550A
• 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: Flush-End M10 Metric Threads (TTF)
• Indication System: Integrated Mechanical Striker
• Pre-arcing I²t: 46 kA²s
• Total Clearing I²t at Rated Voltage: 280 kA²s
• Power Dissipation at In: 90W
• Standards Compliance: IEC 60269-4, UL/CSA Recognized E76491, RoHS Compliant
• Quantity: Pack of 3