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Square D 9050FSR4 - 400A 3 Pole Circuit Breaker (600V)

Square D
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Square D 9050FSR4 is a 400A, 600V, 3 Pole molded case circuit breaker engineered for permanent trip applications in commercial and industrial power distribution systems. It utilizes thermal-magnetic protection to safeguard circuits from overloads and short circuits, operating within a Q4 frame for robust performance. The breaker is constructed with glass-reinforced insulating material for high dielectric strength, isolating current-carrying components from the handle and accessory mounting area, and weighs 5.19 lb. It is UL Listed, CSA Certified, and IEC Rated for safe and reliable operation. This unit is designed for I-Line mounting, making it suitable for demanding electrical environments where consistent protection is critical.

Key Features & Specifications
  • Manufacturer: Square D
  • Part Number: 9050FSR4
  • Amperage: 400A
  • Voltage: 600V
  • Poles: 3 Pole
  • Frame: Q4
  • Mounting Type: I-Line
  • Protection Type: Thermal-Magnetic
  • Application: Permanent Trip
  • Certifications: UL Listed, CSA Certified, IEC Rated
  • Weight: 5.19 lb