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Siemens NEB1B045 - Molded Case Circuit Breaker 45A 1-Pole 277V

Siemens
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Siemens NEB1B045 is a 1-pole molded case circuit breaker from the NEB Series, designed to provide LI (Long-Time and Instantaneous) overcurrent protection in low voltage power distribution systems. It is rated for 45A at 277V AC with a 35kA interrupting capacity at 277V, utilizing a thermal-magnetic trip unit for reliable response to both overloads and short circuits. The unit features a bolt-on connection for secure mounting and weighs 1 lb, with a compact single-phase construction suitable for panelboard installations. It is UL listed and complies with industry safety and performance standards for molded case breakers. Typical applications include branch circuit protection in commercial and industrial electrical systems requiring dependable overcurrent interruption.

Key Features & Specifications
  • Manufacturer: Siemens
  • Series: NEB
  • Type: NEB
  • Amperage: 45 Amps
  • Voltage Rating: 277 Volts AC
  • Number of Poles: 1
  • Phase: 1
  • Mounting Type: Bolt-On
  • Connection: Bolt-On
  • Trip Unit: Thermal-Magnetic
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • AIC Rating: 35kA@277V
  • Weight: 1 lb
  • UL Listed