S&C Electric 578125R4 - SM-4 Fuse Refill 115kV (Very Slow Blow)
S&C Electric 578125R4 - SM-4 Fuse Refill 115kV (Very Slow Blow)
S&C Electric 578125R4 - SM-4 Fuse Refill 115kV (Very Slow Blow)
S&C Electric 578125R4 - SM-4 Fuse Refill 115kV (Very Slow Blow)

S&C Electric 578125R4 - SM-4 Fuse Refill 115kV (Very Slow Blow)

S&C Electric
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S&C Electric 578125R4 is a high-voltage fuse refill designed for circuit protection in electrical distribution systems. Rated for 115kV applications, this very slow-acting fuse provides reliable overcurrent protection with precise interruption characteristics. The SM-4 family fuse features durable construction with a standardized 578-type refill configuration, weighing 1 lb for easy handling during maintenance. It meets industry standards for high-voltage protection devices and is commonly used in utility substations, industrial power distribution, and transmission line protection systems.

Key Features & Specifications
  • Type: SM-4 family, 578-type fuse refill, very slow blow characteristic
  • Voltage Rating: 115,000V AC
  • Current Rating: Not specified (configuration-dependent)
  • Dimensions: Standard SM-4 form factor
  • Standards: Industrial high-voltage fuse requirements
  • Applications: Substation protection, transmission line safety, industrial power distribution
  • Velocity: Very slow operation
  • Weight: 1 lb
  • Section: Fuse refills