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C3 Controls 320-B2U12 - Thermal Overload Relay, 600V AC

C3 Controls
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C3 Controls 320-B2U12 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 coil voltage of 600V AC and features a current rating adjustable within a specified range to match motor full-load amps. The unit is constructed with durable materials in a compact form factor, complying with relevant industry standards for safety and performance. This relay is typically applied in industrial control panels and motor starter combinations to safeguard three-phase AC motors in various machinery and HVAC systems.

Key Features & Specifications
  • Type: Thermal Overload Relay, Manual Reset, 3-Pole
  • Voltage Rating: 600V AC Maximum
  • Current Rating: Adjustable Range (Specific to B2U12 frame)
  • Dimensions: Compact design for standard starter mounting
  • Standards: Complies with UL, CSA, and IEC standards
  • Applications: Motor protection in industrial controls, pumps, fans, and compressors
  • Configuration: 3-Pole
  • Coil Voltage Maximum: 600V AC
  • Mounting: DIN Rail or Direct to Starter
  • Phase: 3-Phase
  • Protection: Overload, Phase Loss
  • Functions: Manual Reset, Trip Indication
  • Nema Starter Size: Compatible with specific NEMA starter sizes
  • Full Load Amps: Adjustable setting
  • Enclosure: Open Style for panel mounting
  • Aux Contacts: Typically includes alarm contact
  • Weight: 5 lb


Product Identification
  • Manufacturer: C3 Controls
  • Model: 320-B2U12
  • Item Subcategory: Overload Relay