FERRAZ SHAWMUT A300058C 6.9URD30TTF0350 690VAC 350A

Ferraz Shawmut A300058C High-Speed Semiconductor Fuse Description The Ferraz Shawmut Protistor A300058C is a high-performance square-body fuse, engineered for the demanding requirements of semiconductor protection. It provides extremely fast-acting protection (aR class) against short-circuit currents, making it ideal for safeguarding power converters, drives, UPS systems, and other power electronic devices. This model includes a visual trip indicator for quick fault diagnosis. Specifications Manufacturer: Ferraz Shawmut (now Mersen) Part Number: A300058C Reference Number: 6.9URD30TTF0350 Voltage Rating: 690V AC Current Rating: 350A Fuse Class: aR Breaking Capacity: 200kA Body Style: Square Body, French Style Size 30 Features: Visual trip indicator Label Info Protistor A300058 690V~ 350A EN 60 269 Class aR Application Designed for the critical protection of power semiconductors such as diodes, thyristors, GTOs, and IGBTs in high-power applications including variable speed drives, power rectifiers, and soft starters. Country of Origin Made in France. CO2 Impact By purchasing this reused component, you help avoid the emission of 10.0 kg of CO2, which is equivalent to driving a car for approximately 50 kilometers. This choice supports a more sustainable industrial environment. Availability This item is in stock and ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ What does the ‘aR’ class rating signify for this fuse?The ‘aR’ class rating indicates a partial-range breaking capacity fuse, specifically designed for short-circuit protection of semiconductor devices like thyristors, diodes, and IGBTs. It has a very fast clearing time but is not intended for overload protection. Can this A300058C fuse be used in a DC circuit?While primarily rated for 690V AC, many high-speed fuses like this can be used in DC applications, but typically at a lower voltage rating. You must consult the official Mersen datasheet for the specific DC voltage rating and time constant (L/R) limitations to ensure safe operation. How can I tell if this fuse has blown?This fuse is equipped with a visual trip indicator. The small red dot, visible on the top surface, will pop out when the fuse has cleared a fault. This provides an immediate visual confirmation of the fuse’s status. profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder. Last Update: Friday, March 13, 2026