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Siemens NEB1B040 - Molded Case Breaker 40A 277V

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Siemens NEB1B040 is a single-pole molded case circuit breaker from the NEB Series, designed for overcurrent protection in commercial and industrial electrical systems. It is rated for 40A at 277V AC, providing LI (Long-Time and Instantaneous) protection via a thermal magnetic trip unit, with a high interrupting capacity of 35kA at 277V. The unit features a bolt-on connection for secure installation and weighs 1 lb, operating on a single-phase system.

Key Features & Specifications
  • Type: Molded Case
  • Family: NEB Series
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 277V
  • Poles: 1
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 35kA@277V
  • Phase: 1
  • Current Rating: 40A
  • Weight: 1 lb