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Westinghouse NB21200S - Molded Case 1200A 2-Pole (600V)

Westinghouse
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Westinghouse NB21200S Circuit Breaker - Molded Case 1200A 2-Pole (600V Thermal Magnetic) The Westinghouse NB21200S is a molded case circuit breaker designed for reliable overcurrent protection in industrial and commercial power distribution systems. This 2-pole, 1200A unit operates at a maximum voltage rating of 600V AC and provides LI (Long-Time and Instantaneous) protection functions through a thermal magnetic trip mechanism. The breaker features a bolt-on mounting connection, weighs 53 lb, and is constructed as a single-phase device within the NB Series family. It carries an interrupting capacity of 30kA at 480V AC, meeting industry standards for safety and performance in high-fault-current environments. Typical applications include main feeder protection, panelboard disconnects, and heavy equipment circuits in manufacturing plants and commercial facilities.

Key Features & Specifications
  • Type: NB
  • Item Subcategory: Molded Case
  • Family: NB Series
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 2
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 30kA@480V
  • Phase: 1
  • Current Rating: 1200A
  • Weight: 53 lb