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Square D Q1B245 - Molded Case Circuit Breaker 45A 2-Pole 240V

Square D
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Square D Q1B245 is a 2-pole, 240V molded case circuit breaker from the Q1B Series, designed to provide thermal-magnetic overcurrent protection with LI (Long-Time and Instantaneous) trip functions for commercial and industrial applications. It is rated for 45 amps with a 10kA interrupting capacity at 240V, ensuring robust fault clearing in single-phase systems. The breaker features a bolt-on connection style, a 100A frame, and weighs 2 lb, offering a compact and secure mounting solution for panelboards. It is UL Listed, meeting stringent safety and performance standards for reliable operation. This breaker is typically used in distribution panels, lighting panels, and other equipment requiring dependable branch circuit protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker
  • Manufacturer: Square D
  • Series: Q1B
  • Poles: 2
  • Voltage Rating: 240VAC
  • Current Rating: 45A
  • Interrupt Rating: 10kA@240V
  • Phase: 1
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Type: 100A
  • Weight: 2 lb
  • Certifications: UL Listed
  • Application: Commercial, Industrial


Part Number: Q1B245