Mersen PC32UD69V500A Protistor Fuse, 500A 690V AC, Size 32 aR, High-Speed Square Body with Striker - Pack of 3

The Mersen Protistor® PC32UD69V500A (Item Number R130111) 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 is engineered for 690V AC applications, providing exceptional protection for heavy-duty industrial electronics including large power converters, variable frequency drives (VFDs), and high-capacity UPS units. Its design focuses on extremely low I²t values to ensure maximum protection for sensitive power semiconductors like thyristors and IGBTs against short-circuit events.

The unit features a premium ceramic housing and silver-plated contact surfaces for optimal electrical conductivity and thermal stability. The internal architecture uses pure silver elements embedded in high-purity silica sand, enabling a high breaking capacity of 200kA and rapid arc quenching. This fuse is equipped with a mechanical striker, which serves as a visible fault indicator and can be used to trigger auxiliary microswitches for remote system monitoring and safety interlocking.

Technical Specifications

• Manufacturer: Mersen
• Catalog Number: PC32UD69V500A
• Item Number: R130111
• Amperage Rating: 500A
• 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: 38 kA²s
• Total Clearing I²t at Rated Voltage: 250 kA²s
• Power Dissipation at Rated Current: 95W
• Standards Compliance: IEC 60269-4, UL 248-13 Recognized, CCC
• Quantity: Pack of 3