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Merlin Gerin ST308S-LSI-1200A - Trip Unit 1200A LSI (600V 3-Pole)

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 LSI (Long-Time, Short-Time, and Instantaneous) protection functions for overload and short circuit conditions. It is rated for 1200 amperes maximum and minimum, with a voltage rating of 600V AC, and configured for 3-pole applications. This trip unit weighs 15 lb and is compatible with Masterpact M and MP frames, featuring a modular construction for integration into low voltage power distribution systems. It is part of the Masterpact ST series, known for high breaking capacity and reliable performance in industrial environments. Typical applications include protecting electrical distribution systems in manufacturing facilities, data centers, and commercial buildings.

Key Features & Specifications
  • Manufacturer: Merlin Gerin
  • Item Subcategory: Trip Units & Programmers
  • Family: Masterpact
  • Type: ST
  • Weight: 15 lb
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Amperage Minimum: 1200
  • Protection: Solid State
  • Compatible Frames: M, MP
  • Amperage Maximum: 1200
  • Part Number: ST308S-LSI-1200A
  • Mounting: Compatible with Masterpact circuit breakers