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Square D MA363001021 - Molded Case Circuit Breaker 300A 600V

Square D
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Square D MA363001021 is a 3-pole, 300A molded case circuit breaker from the I-Line family, designed for thermal-magnetic protection with LI (Long-Time and Instantaneous) functions. It operates at a voltage rating of 600V and a current rating of 300A, with an AIC rating of 30kA at 480V, and features an I-Line style plug-in connection for 3-phase systems. The breaker weighs 38 lb and is built on an M Frame, complete with a 120V shunt trip for remote tripping capability. It complies with industry standards for molded case circuit breakers, ensuring reliable overcurrent protection in industrial power distribution applications. This unit is typically used in switchboards, panelboards, and motor control centers requiring high-ampacity, coordinated protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic, I-Line Style Plug-In
  • Voltage Rating: 600V
  • Current Rating: 300A
  • Poles: 3
  • Phase: 3
  • AIC Rating: 30kA@480V
  • Frame Size: M Frame
  • Functions: LI - Long-Time and Instantaneous
  • Connection: I-Line Style Plug-In
  • Additional Info: Complete with 120V shunt trip
  • Weight: 38 lb


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