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Square D S144C - Solid-State Trip Unit LSIG Protection (600V)

Square D
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Square D S144C is a Micrologic solid-state trip unit designed for advanced circuit protection in industrial power distribution systems. It provides comprehensive LSIG protection—Long-Time, Short-Time, Instantaneous, and Ground Fault—for circuits rated up to 600V AC. The unit is engineered for integration with compatible Square D circuit breaker frames including NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, and RL, featuring a compact, modular design with a weight of 1 lb. It meets relevant industry standards for solid-state protective devices, making it suitable for critical applications in manufacturing, data centers, and commercial facilities where precise and reliable fault protection is required.

Key Features & Specifications
  • Type: Solid-State Trip Unit (Programmer)
  • Voltage Rating: 600V AC
  • Protection Functions: LSIG (Long-Time, Short-Time, Instantaneous, Ground Fault)
  • Compatible Frames: NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, RL
  • Weight: 1 lb
  • Family: Micrologic
  • Item Subcategory: Trip Units & Programmers


Product Identification
  • Manufacturer Part Number: S144C