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C3 Controls 320-B4U70 - Thermal Overload Relay

C3 Controls
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C3 Controls 320-B4U70 is a thermal overload relay designed to provide reliable motor protection by monitoring current and tripping to prevent damage from overload conditions. It is rated for a maximum operational voltage of 600V AC and a full load current adjustable within a specified range, housed in a compact, durable enclosure constructed for industrial longevity. This device complies with relevant industry standards, ensuring safe integration into motor control circuits. It is typically applied in industrial settings for protecting three-phase motors in machinery, pumps, and conveyor systems.

Key Features & Specifications
  • Type: Thermal overload relay, manual reset, with ambient temperature compensation
  • Voltage Rating: 600V AC
  • Current Rating: Adjustable range (specific to model series)
  • Dimensions: Compact design for standard contactor mounting
  • Standards: Compliant with UL, CSA, and IEC standards
  • Applications: Protection for three-phase motors in industrial machinery, pumps, and conveyors
  • Mounting: DIN rail or direct mount
  • Phase: 3-phase
  • Protection: Overload protection
  • Functions: Trip indication, test function
  • Enclosure: Open style for panel mounting
  • Weight: 5 lb


Product Identification
  • Manufacturer: C3 Controls
  • Model: 320-B4U70
  • Item Subcategory: Overload Relay