Product Description
The Ferraz Shawmut X300009 Protistor fuse is a premium ultra-fast acting square-body fuse designed to protect sensitive power electronics and semiconductor devices. Now part of the Mersen Group and also identified as PC31UD69V700TF, this fuse delivers dependable, rapid fault interruption in high-power applications where equipment protection is critical.
With a 700 Amp rating and voltage capability of 690V AC (IEC) / 700V AC (UL), the X300009 is engineered for power conversion systems, motor drives, and industrial regulators. Its ceramic body, silver-plated terminals, and built-in striker provide durability, thermal stability, and clear fuse status indication.
Key Features & Specifications
• Amperage Rating: 700 A
• Voltage Rating: 690 V AC (IEC) / 700 V AC (UL)
• Fuse Class: aR (Ultra-Fast Acting for semiconductor protection)
• Body Type: Square body with flush-end metric bolted terminals
• Interrupting Rating: 200 kA AC maximum
• Material: Ceramic body with silver-plated brass terminals
• Indication System: Integrated striker for fuse status indication
• Power Dissipation: 85 W at rated current
• Manufacturer: Ferraz Shawmut (Mersen Group)
• Alternate Part Number: PC31UD69V700TF
Applications
• Semiconductor protection for diodes, thyristors, and IGBT devices
• Industrial motor drives and power regulators
• Power conversion and rectifier systems
• High-performance industrial and commercial electrical equipment
