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Siemens 3RU1146-4KB0 - Thermal Overload Relay 57-75A

Siemens
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Siemens 3RU1146-4KB0 is a thermal overload relay designed for protecting three-phase AC motors from damage due to overload, phase failure, and phase imbalance. It features an adjustable current setting range from 57 to 75 amperes, housed in a compact and robust 1.254 lb enclosure compliant with international industrial standards. This relay is engineered for reliable integration into motor control centers and starter assemblies across demanding applications such as pumps, fans, and conveyor systems.

Key Features & Specifications
  • Type: Thermal Overload Relay, 3RU11 Series, Manual/Automatic Reset
  • Voltage Rating: For use in control circuits up to 690V AC
  • Current Rating: Adjustable, 57A to 75A
  • Dimensions: Compact design for standard mounting
  • Standards: IEC/EN 60947-4-1, UL 508, CSA C22.2 No. 14
  • Applications: Protection for three-phase AC motors in industrial machinery
  • Relay Style: Thermal, bi-metallic trip mechanism
  • Amperage Minimum: 57 A
  • Amperage Maximum: 75 A
  • Family: Sirius
  • Weight: 1.254 lb


Product Identification
  • UPC: 075455441258
  • GTIN: 00754554412580