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C3 Controls 320-B2U17 - Thermal Overload Relay

C3 Controls
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C3 Controls 320-B2U17 is a thermal overload relay designed to provide reliable motor protection by monitoring current and tripping to prevent damage from overloads or phase loss. It features a current rating adjustable within a specified range and is engineered for use with common industrial control voltages. The relay is constructed with durable materials in a compact form factor, featuring screw terminal connections for secure wiring. It complies with relevant industry standards for safety and performance, ensuring suitability for integration into motor control centers, pump control panels, and other industrial automation systems involving three-phase motors.

Key Features & Specifications
  • Type: Thermal, Bi-metallic Overload Relay
  • Voltage Rating: Control circuit voltage specified by coil rating
  • Current Rating: Adjustable setting range (specific amperage to be confirmed per model)
  • Dimensions: Compact design for standard contactor mounting
  • Standards: Complies with UL, CSA, and IEC standards
  • Applications: Motor protection in pumps, fans, conveyors, and industrial machinery
  • Configuration: 3-pole
  • Mounting: Direct mount to compatible contactors
  • Connection: Screw terminals
  • Aux Contacts: Typically includes normally open and normally closed alarm contacts
  • Full Load Amps: Adjustable via dial setting
  • Enclosure: Open style for panel mounting
  • Weight: 5 lb


Product Identification
  • Manufacturer: C3 Controls
  • Model: 320-B2U17
  • Item Subcategory: Overload Relay