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Merlin Gerin ST308S-LSI-1200A - Solid State Trip Unit 600V 1200A

Merlin Gerin
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Merlin Gerin ST308S-LSI-1200A is a solid-state trip unit designed for the Masterpact family of circuit breakers, providing adjustable long-time, short-time, and instantaneous protection functions. It is rated for 600V AC and 1200A, with a 3-pole configuration that ensures precise overcurrent protection in low-voltage power distribution systems. Weighing 15 lb, this trip unit is constructed for integration into M and MP compatible frames, featuring a compact design suited for panelboard or switchboard installations. The unit complies with industry standards for industrial circuit protection, offering reliable performance in demanding environments. Typical applications include main and feeder protection in commercial and industrial power systems, where selective coordination and high fault current interruption are required.

Key Features & Specifications
  • Type: Solid State Trip Unit, Masterpact Family
  • Voltage Rating: 600V AC
  • Current Rating: 1200A (Minimum and Maximum)
  • Poles: 3
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Protection: Solid State
  • Compatible Frames: M, MP
  • Weight: 15 lb
  • Standards: Industry standard for low voltage circuit protection
  • Applications: Main and feeder protection in commercial and industrial power systems


Product Identification
  • UPC: Not available
  • GTIN: Not available