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Square D PXF36900LSI - Molded Case Circuit Breaker 900A 600V

Square D
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Square D PXF36900LSI is a PXF frame molded case circuit breaker designed for high-amperage commercial and industrial power distribution, providing LSI (Long-Time, Short-Time, and Instantaneous) protection via a solid-state electronic trip unit. It is rated for 900 amperes at 600V AC with three poles and a 100kA interrupting capacity at 480V, supporting three-phase systems. The unit weighs 90 lb and features a bolt-on connection with a PX frame size and a 1200A sensor, operating at a temperature rating of 40°C. This breaker complies with industry standards for molded case circuit breakers, ensuring reliable overcurrent protection in demanding electrical environments. Typical applications include industrial power distribution panels and commercial infrastructure requiring precise trip characteristics and robust circuit isolation.

Key Features & Specifications
  • Manufacturer: Square D
  • Item Subcategory: Molded Case
  • Family: Micrologic
  • Type: PXF
  • Weight: 90 lb
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Frame Size: PX Frame
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Solid State
  • AIC rating: 100kA@480V
  • Phase: 3
  • Current Rating: 900A
  • Part Number: PXF36900LSI
  • Series/Frame: PXF
  • Amperage: 900A
  • Mounting Type: Bolt-On
  • Trip Unit: Electronic Non-Interchangeable, LSI
  • Frame Size: 1200A Sensor
  • Interrupt Rating: 100kA
  • Temperature Rating: 40°C
  • Application: Molded Case Circuit Breaker