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Square D A1B345 - Molded Case Breaker 45A 240V 3-Pole

Square D
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Square D A1B345 is a 3-pole molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. It is rated for 240V AC, 45A, and 10kA interrupting capacity at 240V, with a thermal-magnetic trip mechanism providing LI (Long-Time and Instantaneous) protection functions. This bolt-on breaker weighs 2 lb and is part of the A1B Series, featuring a 3-phase configuration for reliable branch circuit protection. It complies with applicable UL and NEMA standards for molded case circuit breakers. Typical applications include motor control centers, panelboards, and switchboards requiring compact, high-interrupting capacity protection.

Key Features & Specifications
  • Type: Molded Case, Thermal Magnetic
  • Voltage Rating: 240V
  • Current Rating: 45A
  • Poles: 3
  • Connection: Bolt-On
  • Protection: LI - Long-Time and Instantaneous
  • AIC Rating: 10kA@240V
  • Phase: 3
  • Weight: 2 lb
  • Family: A1B Series
  • Functions: LI - Long-Time and Instantaneous