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Square D Q1B31001021 - 3-Pole 100A Molded Case Breaker 240V

Square D
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Square D Q1B31001021 is a 3-pole molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. It is rated for 240V AC, 100A continuous current, and provides a 10kA interrupting capacity at 240V for fault clearing. This bolt-on unit weighs 2 lb and features a thermal magnetic trip mechanism with LI (Long-Time and Instantaneous) protection functions for precise coordination. It complies with UL and NEMA standards for reliable performance in panelboards and switchboards. Typical applications include motor control centers, lighting panels, and feeder circuits in commercial and industrial facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic
  • Voltage Rating: 240V AC
  • Current Rating: 100A
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On
  • AIC Rating: 10kA@240V
  • Functions: LI - Long-Time and Instantaneous
  • Weight: 2 lb
  • Family: Q1B Series
  • Item Subcategory: Molded Case
  • Protection: Thermal Magnetic


Product Identification
  • UPC: Not specified
  • GTIN: Not specified