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Siemens NR423 - Fusible Disconnect Switch 3P 100A (100kA AIC @240V)

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Siemens NR423 is a fusible safety disconnect switch designed for industrial power distribution protection. It features a 240V AC voltage rating and 100A current capacity in a compact 3-pole single configuration with Class R fuse compatibility. The rugged NEMA 3R-rated enclosure houses copper bus bars and weighs 20 lb, meeting UL and IEC safety standards for short-circuit interruption up to 100kA at 240V. This switch is commonly used in motor control centers, panelboards, and industrial machinery requiring reliable circuit isolation.

Key Features & Specifications
  • Type: Fusible safety disconnect switch with copper contacts
  • Voltage Rating: 240V AC
  • Current Rating: 100A
  • Configuration: Single
  • Poles: 3
  • Phase: 3
  • Fuse Class: R
  • AIC Rating: 100kA@240V
  • Wire: 3
  • NEMA Rating: 3R
  • Compatible Frames: PJP
  • Switch Style: Fusible
  • Weight: 20 lb
  • Standards: UL 98, IEC 60947-3
  • Applications: Industrial power distribution, MCCs, panelboards