S&C Electric 454125R1 - SMD-1A Fuse 34.5kV 125A (Slow-Blow Medium Voltage)

S&C Electric 454125R1 is a medium-voltage fuse designed for high-voltage circuit protection in industrial power systems. This SMD-1A class fuse operates at 34,500V AC with a 125A current rating, featuring slow-blow characteristics for controlled interruption. The 10 lb unit employs robust construction with precision-engineered fusible elements housed in a durable ceramic body, meeting IEEE C37.40-2003 standards for medium-voltage protection. It is commonly deployed in substations, transformers, and feeder circuits requiring reliable overcurrent protection.

Key Features & Specifications

• Type: SMD-1A slow-blow medium-voltage fuse
• Voltage Rating: 34,500V AC
• Current Rating: 125A
• Class Rating: SMD-1A
• Interrupting Capacity: High (per IEEE C37.40)
• Operating Characteristics: Time-delay (slow-blow)
• Weight: 10 lb
• Standards: IEEE C37.40-2003 compliant
• Applications: Substation equipment, transformer protection, industrial feeders