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Merlin Gerin STR58U-LSI-4000A - Trip Unit 4000A (3-Pole Solid State)

Merlin Gerin
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Merlin Gerin STR58U-LSI-4000A is a solid-state trip unit designed for advanced protection of high-amperage electrical systems within Masterpact circuit breakers. It delivers LSI (Long-Time, Short-Time, and Instantaneous) protection functions for precise overcurrent and short-circuit management. Rated for 600V and 4000A across 3 poles, this unit is compatible with M and MP frame circuit breakers. The trip unit weighs 10 lb and is constructed for integration into industrial power distribution panels.

Key Features & Specifications
  • Manufacturer: Merlin Gerin
  • Family: Masterpact
  • Type: STR
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Voltage Rating: 600V
  • Amperage: 4000A
  • Number of Poles: 3
  • Protection: Solid State
  • Compatible Frames: M, MP
  • Weight: 10 lb