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S173N

Merlin Gerin
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Schneider Electric S173N is a Micrologic solid-state trip unit designed for LSI protection—long-time, short-time, and instantaneous—in low-voltage power distribution systems. It is rated for 600V and integrates seamlessly with compatible NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, and RL frame circuit breakers. The unit weighs 1 lb and is constructed as a programmable trip unit for precise overcurrent coordination. It complies with IEC 60947-2 standards for isolation and is suitable for general circuit protection in industrial and commercial applications.

Key Features & Specifications
  • Manufacturer: Schneider Electric
  • Item Subcategory: Trip Units & Programmers
  • Family: Micrologic
  • Type: S173
  • Weight: 1 lb
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Voltage Rating: 600V
  • Protection: Solid State
  • Compatible Frames: NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, RL
  • Rated Current: 4A
  • Rated Voltage: 230–240 V AC
  • Poles: 1P
  • Mounting Type: DIN Rail
  • Interrupt Rating: 10 kA at 230–240 V AC
  • Trip Unit: Thermal-Magnetic, C Curve
  • Certifications: IEC 60947-2
  • Frequency: 50/60 Hz
  • Suitable for Isolation: Yes


Schneider Electric S173N - Trip Unit LSI 600V (Micrologic)