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Siemens F3B090 - Molded Case 90A 3-Pole Thermal Magnetic (600V F Frame)

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Siemens F3B090 Circuit Breaker - Molded Case 90A 3-Pole Thermal Magnetic (600V F Frame) The Siemens F3B090 is a 3-pole molded case circuit breaker from the F Frame family, designed to provide LI (Long-Time and Instantaneous) protection through its thermal magnetic trip mechanism. It is rated for 600V AC, 90A continuous current, and 3-phase operation, ensuring reliable overcurrent and short-circuit interruption in industrial power distribution systems. Weighing 5 lb, this Type F breaker features a compact molded case construction suitable for panelboard or switchboard installation. It complies with applicable UL and NEMA standards for industrial circuit protection. Typical applications include motor control centers, lighting panels, and feeder circuits in manufacturing facilities and commercial buildings.

Key Features & Specifications
  • Type: Molded Case, F Frame, Type F, Thermal Magnetic
  • Voltage Rating: 600V AC
  • Current Rating: 90A
  • Poles: 3
  • Phase: 3
  • Protection: LI - Long-Time and Instantaneous
  • Weight: 5 lb
  • Standards: UL 489, NEMA AB1
  • Applications: Industrial power distribution, motor control, feeder circuits