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Square D 9421LW4 - Molded Case Circuit Breaker 400A 600VAC

Square D
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Square D 9421LW4 is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial power distribution systems. It features a 600V AC voltage rating and a 400A current rating, housed within a durable, compact frame designed for consistent performance. The breaker is constructed with robust materials and complies with NEMA standards for industrial electrical equipment. Its typical applications include protecting feeders and branch circuits in manufacturing facilities, data centers, and commercial buildings.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker (MCCB), Thermal-Magnetic Trip
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Frame Size: 400A Frame
  • Poles: 3
  • AIC Rating: Typically 65kA at 480V AC (verify specific rating for application)
  • Trip Type: Fixed
  • Connection: Lug or Stud
  • Standards: NEMA Certified
  • Dimensions: Compact design, specific dimensions consult datasheet
  • Weight: 12 lb
  • Country of Origin: Mexico
  • Applications: Industrial power distribution, feeder protection, branch circuit protection


Product Identification
  • Manufacturer: Schneider Electric
  • UPC: 785901801214
  • GTIN: 00785901801214