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Merlin Gerin S131D - Solid-State Trip Unit 600V (LI Protection)

Merlin Gerin
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The Merlin Gerin S131D is a solid-state trip unit designed to provide precise long-time and instantaneous overcurrent protection for low-voltage power distribution systems. It operates at a voltage rating of 600V AC and is engineered for integration into compatible circuit breaker frames including NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, and RL. The unit features a compact, durable construction with a weight of 1 lb, ensuring reliable performance in demanding industrial environments. It complies with relevant industry standards for electrical protection devices. Typical applications include protecting feeders, motors, and generators within industrial plants, commercial buildings, and infrastructure projects.

Key Features & Specifications
  • Type: Solid-state electronic trip unit (Micrologic family)
  • Voltage Rating: 600V AC
  • Functions: LI (Long-Time and Instantaneous protection)
  • Protection: Solid State
  • Compatible Frames: NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, RL
  • Weight: 1 lb


Product Identification
  • Manufacturer Part Number: S131D