Mersen PC32UD69V550A Protistor Fuse, 550A 690V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® PC32UD69V550A (Item Number S130112) is a precision-engineered ultra-fast acting square body fuse-link, specifically developed for the rigorous protection requirements of power semiconductor devices. This Size 32 aR category fuse is rated for 690V AC and is a critical component for safeguarding industrial power electronics such as rectifiers, inverters, and high-power motor drives. It excels in limiting let-through energy (I²t), thereby preventing damage to sensitive components like diodes and SCRs during overcurrent or short-circuit faults.

Constructed with high-quality ceramic for superior thermal management and silver-plated copper terminals for low power loss, this fuse ensures long-term reliability in demanding environments. The internal pure silver elements and high-purity silica sand filler allow for a massive breaking capacity of 200kA. This model includes an integrated mechanical striker, providing an immediate visual signal when the fuse has blown and allowing for the integration of microswitches for remote circuit status monitoring.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: PC32UD69V550A
• Item Number: S130112
• Amperage Rating: 550A
• 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 (M10)
• Indication System: Integrated Mechanical Striker
• Pre-arcing I²t: 53 kA²s
• Total Clearing I²t at Rated Voltage: 350 kA²s
• Power Dissipation at Rated Current: 105W
• Standards Compliance: IEC 60269-4, UL 248-13 Recognized, CCC, RoHS Compliant
• Quantity: Pack of 3