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Siemens 3RU1146-4KD0 - Overload Relay 57-75A Class 10

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Siemens 3RU1146-4KD0 is an overload relay designed for motor protection, featuring a Size S3 frame and a Class 10 trip unit. It operates with a current range of 57 to 75 amperes and is intended for contactor mounting with screw terminal main circuit connections and spring-type auxiliary terminals. The device measures 4.409 x 2.992 x 5.157 inches, weighs 1.334 lb, and is manufactured in Germany. It provides manual and automatic reset functions and is suitable for use with Siemens 3RT104 series contactors. This overload relay is typically applied in industrial motor control systems requiring reliable overload protection.

Key Features & Specifications
  • Amperage range: 57-75 A
  • Size: S3 frame
  • Trip class: 10
  • Mounting type: Contactor mounting
  • Main circuit terminals: Screw terminal
  • Auxiliary circuit terminals: Spring-type terminal
  • Manual and automatic reset functions
  • UPC: 754554412269
  • Country of Origin: Germany
  • Dimensions: 4.409 x 2.992 x 5.157 inch
  • Weight: 1.334 lb


Product Identification
  • UPC: 754554412269