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Square D Q1B250 - Molded Case Circuit Breaker 50A 2-Pole

Square D
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Square D Q1B250 is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial and commercial electrical systems. It features a 50A current rating and a 240V AC voltage rating, engineered for single-phase applications with a 10kA interrupting capacity at 240V. The breaker utilizes a two-pole, bolt-on connection design with a thermal-magnetic trip mechanism that provides both long-time and instantaneous (LI) protection functions. It is constructed as part of the Q1B series, meeting relevant industry standards for safety and performance in panelboard and switchboard installations. Typical applications include protecting feeder and branch circuits in commercial buildings and light industrial facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection
  • Voltage Rating: 240V AC
  • Current Rating: 50A
  • Poles: 2
  • Connection: Bolt-On
  • Phase: 1
  • AIC Rating: 10kA @ 240V
  • Protection Functions: Long-Time and Instantaneous (LI)
  • Family: Q1B Series
  • Item Subcategory: Molded Case
  • Weight: 2 lb


Product Identification
  • Manufacturer Part Number: Q1B250