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Merlin Gerin ST308S-LS-250A - Solid-State Trip Unit 250A 600V

Merlin Gerin
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Merlin Gerin ST308S-LS-250A is a solid-state trip unit designed for the Masterpact family of circuit breakers, providing long-time and short-time protection functions. It operates at a voltage rating of 600V and supports a current range from 250A minimum to 250A maximum, configured for 3-pole applications. The unit weighs 15 lb and is compatible with M and MP frames, featuring solid-state protection for precise overcurrent response. This trip unit complies with industry standards for industrial power distribution systems. It is typically applied in commercial and industrial settings requiring selective coordination and adjustable time-current curves.

Key Features & Specifications
  • Type: Solid-state trip unit
  • Voltage Rating: 600V
  • Current Rating: 250A
  • Poles: 3
  • Protection: Solid State
  • Functions: LS - Long-Time and Short-Time
  • Compatible Frames: M, MP
  • Weight: 15 lb
  • Family: Masterpact
  • Item Subcategory: Trip Units & Programmers


Product Identification
  • Manufacturer: Merlin Gerin
  • Model: ST308S-LS-250A