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Cutler Hammer BR320ST - 3-Pole 20A Circuit Breaker (10kA AIC, 240V)

Cutler Hammer
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Cutler Hammer BR320ST is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in three-phase electrical systems. It features a 20A current rating and a 240V AC voltage rating, housed in a compact 3-inch cubic plug-in configuration with a thermal-magnetic trip mechanism for both long-time and instantaneous protection. The breaker is UL 489 listed and meets Federal Specifications Classification W-C375, with an interrupting capacity of 10kA at 240V AC and an operational temperature range of -25 to 70 °C. Its typical applications include industrial control panels, HVAC systems, and machinery where a 20A, 3-pole circuit protection with a factory-installed 120V shunt trip is required.

Key Features & Specifications
  • Type: BR Series, Molded Case, Thermal Magnetic Protection with Long Time and Instantaneous Trip Functions
  • Voltage Rating: 240V AC
  • Current Rating: 20A
  • Dimensions: 3 in L x 3 in H x 3 in W
  • Standards: UL 489, Federal Specifications Classification W-C375
  • Applications: Industrial Control Panels, Machinery, HVAC Systems
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Phase: 3
  • AIC Rating: 10kA @ 240V AC
  • Connection: Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Wire Size: #14 to 4 AWG (Copper/Aluminum)
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Additional Info: Complete with 120V Shunt Trip
  • Weight: 1.3 lb
  • Country of Origin: Dominican Republic


Product Identification
  • UPC: 786676003360
  • GTIN: 00786676003360