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Square D S143R - Solid-State Trip Unit 600V LSI Protection

Square D
Price
Save $-5,635.90
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Square D S143R is a 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 low-voltage power circuit breakers, operating with a voltage rating of 600V AC. The unit is engineered for reliable performance and integrates seamlessly into compatible breaker frames. It is designed to meet rigorous industry standards for electrical protection and coordination. Typical applications include protecting feeders, mains, and large branch circuits in commercial and industrial facilities.

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


Product Identification
  • Manufacturer Part Number: S143R