Cutler Hammer BR390ST - 90A 3-Pole Molded Case Circuit Breaker
Cutler Hammer BR390ST - 90A 3-Pole Molded Case Circuit Breaker
Cutler Hammer BR390ST - 90A 3-Pole Molded Case Circuit Breaker
Cutler Hammer BR390ST - 90A 3-Pole Molded Case Circuit Breaker
Cutler Hammer BR390ST - 90A 3-Pole Molded Case Circuit Breaker
Cutler Hammer BR390ST - 90A 3-Pole Molded Case Circuit Breaker

Cutler Hammer BR390ST - 90A 3-Pole Molded Case Circuit Breaker

Cutler Hammer
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The Cutler Hammer BR390ST is a three-pole, 90-amp molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection for three-phase industrial electrical systems. It features a 240V AC voltage rating and a 10kA interrupting capacity at that voltage, utilizing a thermal-magnetic trip unit for both long-time delay and instantaneous protection functions. The compact, plug-in unit measures 3 inches in all dimensions, weighs 1.3 lb, and is constructed for operation in temperatures from -25°C to 70°C. It complies with UL 489 and Federal Specification W-C375 standards, ensuring suitability for panelboards and switchboards in commercial and industrial facilities, and includes an integrated 120V shunt trip for remote tripping capability.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Plug-In Connection
  • Voltage Rating: 240V AC
  • Current Rating: 90A
  • Dimensions: 3 in x 3 in x 3 in (L/D x H x W)
  • Standards: UL 489, Federal Specifications Classification W-C375
  • Applications: Panelboard & Switchboard Protection for Three-Phase Systems
  • Switch Type: Circuit Breaker
  • Configuration: Three-Pole
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Phase: 3
  • AIC Rating: 10kA @ 240V AC
  • Connection: Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Wire Size: #4 to 1/0 AWG (Copper/Aluminum)
  • Certification: UL 489, W-C375
  • Additional Info: Includes 120V Shunt Trip
  • Weight: 1.3 lb
  • Family: BR Series
  • Country of Origin: Dominican Republic


Product Identification
  • UPC: 786676003476
  • GTIN: 00786676003476