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Merlin Gerin STR58U-LSI-4000A - Solid State Trip Unit 4000A

Merlin Gerin
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Merlin Gerin STR58U-LSI-4000A is a solid-state trip unit designed for overcurrent protection within Masterpact circuit breakers, providing Long-Time, Short-Time, and Instantaneous (LSI) protection functions. It is rated for a maximum voltage of 600V and supports a continuous current range from 4000A minimum to 4000A maximum across three poles. This trip unit weighs 10 lb and is compatible with M and MP frame circuit breakers, featuring a solid-state protection mechanism for precise coordination. It complies with industry standards for industrial power distribution systems. Typical applications include primary and secondary feeder protection in commercial and industrial electrical switchgear.

Key Features & Specifications
  • Type: Solid-state trip unit for Masterpact breakers
  • Voltage Rating: 600V
  • Current Rating: 4000A (minimum and maximum)
  • Poles: 3
  • Protection: Solid State
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Compatible Frames: M, MP
  • Weight: 10 lb
  • Family: Masterpact
  • Item Subcategory: Trip Units & Programmers


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