S&C Electric 254300R4 - SM-4 Medium Voltage Fuse 34.5kV/200A (Class E Slow Blow)

S&C Electric 254300R4 is a medium-voltage SM-4 fuse designed for high-voltage circuit protection in industrial power systems. Rated for 34,500V AC with a 200A current capacity, this Class E fuse features slow blow velocity characteristics for controlled interruption of fault currents. The 2 lb unit employs robust construction with precision-engineered fusible elements housed in a durable ceramic body, complying with IEEE C37.40 standards for medium-voltage protection. Its design ensures reliable operation in utility substations, industrial plants, and mining operations where high-voltage distribution requires selective coordination.

Key Features & Specifications

• Type: SM-4 medium-voltage current-limiting fuse (slow blow)
• Voltage Rating: 34,500V AC
• Current Rating: 200A
• Class Rating: E
• Velocity: Slow blow characteristic
• Weight: 2 lb
• Standards: IEEE C37.40 compliant
• Applications: Utility substations, industrial power distribution, mining equipment