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Square D NA36900 - 900A Molded Case Circuit Breaker

Square D
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Square D NA36900 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial power distribution systems. It features a 900A current rating and a 600V AC voltage rating, housed within a robust N-frame construction with an I-Line style plug-in connection for simplified installation. This thermal magnetic breaker complies with industry standards for safety and performance, offering long-time and instantaneous (LI) trip functions and an interrupting capacity of 50kA at 480V AC. It is engineered for continuous operation in ambient temperatures from -25 to 70 °C and is typically applied in panelboards and switchboards for main feeder and branch circuit protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection, I-Line Family
  • Voltage Rating: 600V AC
  • Current Rating: 900A
  • Frame Size: N Frame
  • Poles: 3
  • Phase: 3
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • Trip Functions: LI - Long-Time and Instantaneous
  • AIC Rating: 50kA @ 480V AC
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Weight: 53 lb


Product Identification
  • Manufacturer Part Number: NA36900