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Square D LH36300 - Molded Case Circuit Breaker 300A 600V 3P

Square D
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Square D LH36300 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial power distribution systems. It features a 300A current rating and a 600V voltage rating, housed within a compact L-frame measuring 317.5 mm H x 152.4 mm W x 101.6 mm D and weighing 18.1 lb. The breaker is UL Listed and CSA certified, utilizing a thermal magnetic protection mechanism with long-time and instantaneous (LI) trip functions to safeguard equipment. Its I-Line style plug-in connection facilitates straightforward installation in compatible panelboards, making it suitable for commercial and industrial applications requiring a 35kA interrupting capacity at 480V.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection with Long-Time and Instantaneous (LI) Trip
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Dimensions: 12.5 in (317.5 mm) H x 6 in (152.4 mm) W x 4 in (101.6 mm) D
  • Standards: UL Listed, CSA Certified
  • Applications: Industrial and Commercial Power Distribution
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Phase: 3
  • AIC Rating: 35kA @ 480V
  • Connection: I-Line Style Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Frame Size: L Frame
  • Trip Type: Thermal Magnetic
  • Breaker Type: Molded Case
  • Mounting: Plug-In
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: I-Line
  • Standards: UL 489, CSA C22.2 No. 5
  • Family: I-Line
  • Country of Origin: Mexico
  • Weight: 18.1 lb


Product Identification
  • UPC: 785901339410
  • GTIN: 00785901339410