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Square D A1B390 - Molded Case Circuit Breaker 90A 3P 240V

Square D
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Square D A1B390 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial electrical systems. It features a 90A current rating and a 240V AC voltage rating, housed within a compact, durable frame with a bolt-on connection for secure installation. This thermal magnetic breaker utilizes long-time and instantaneous (LI) trip functions and offers an interrupting capacity of 10kA at 240V, complying with relevant industry standards for safety and performance. It is typically applied in panelboards, switchboards, and industrial control equipment where robust circuit protection is required.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection
  • Voltage Rating: 240V AC
  • Current Rating: 90A
  • Poles: 3
  • Phase: 3
  • AIC Rating: 10kA @ 240V
  • Connection: Bolt-On
  • Trip Functions: LI (Long-Time and Instantaneous)
  • Family: A1B Series
  • Weight: 2 lb