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Schneider Electric NB400N - Molded Case Circuit Breaker 400A 690V

Merlin Gerin
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Schneider Electric Merlin Gerin NB400N is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in three-phase industrial power distribution systems. It features a solid-state protection system with long-time and instantaneous (LI) trip functions, rated for operation up to 690V AC with a continuous current rating of 400A. The compact, 23 lb unit is constructed as a three-pole, bolt-on device with an interrupting capacity of 25kA at 415V, engineered for robust performance. It complies with relevant industry standards for safety and performance in demanding electrical environments, making it suitable for integration into switchboards, panelboards, and motor control centers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Compact NB Family, Solid-State Protection
  • Voltage Rating: 690V AC
  • Current Rating: 400A
  • Dimensions: Compact Frame
  • Standards: Industry Standard Compliance
  • Applications: Industrial Power Distribution, Switchboards, Panelboards, Motor Control Centers
  • Switch Type: Circuit Breaker
  • Configuration: Three-Pole
  • Phase: 3
  • AIC Rating: 25kA @ 415V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Solid State
  • Functions: LI (Long-Time and Instantaneous)
  • Frame Size: Compact
  • Trip Type: Solid-State
  • Weight: 23 lb
  • Mounting: Fixed


Product Identification
  • Manufacturer Part Number: NB400N