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Square D S133C - Solid-State Trip Unit 600V LSI Protection

Square D
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Square D S133C is a Micrologic solid-state trip unit designed for advanced circuit protection in industrial power distribution systems. It provides comprehensive LSI (Long-Time, Short-Time, and Instantaneous) protection functions for circuit breakers operating at a 600V AC rating. The unit is engineered for integration with compatible Square D breaker frames including NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, and RL. It complies with relevant industry standards for electrical protection devices. This trip unit is typically applied in commercial and industrial facilities to ensure selective coordination and enhance system reliability.

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


Product Identification
  • Manufacturer Part Number: S133C
  • Manufacturer: Schneider Electric