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Cutler Hammer CH390ST - 90A 3-Pole Thermal Magnetic Circuit Breaker

Cutler Hammer
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Cutler Hammer CH390ST is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial electrical systems. It features a 90A current rating and a 240V AC voltage rating, housed within a compact CH frame with a plug-in connection for simplified installation. The breaker utilizes a thermal-magnetic trip mechanism offering both long-time and instantaneous (LI) protection functions, and it is constructed to meet industry standards for safety and performance. Its 10kA interrupting capacity at 240V makes it suitable for safeguarding equipment in commercial and industrial panelboards, switchboards, and motor control centers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection
  • Voltage Rating: 240V AC
  • Current Rating: 90A
  • Frame Size: CH
  • Poles: 3
  • Phase: 3
  • Connection: Plug-In
  • AIC Rating: 10kA @ 240V
  • Protection Functions: Long-Time and Instantaneous (LI)
  • Weight: 1 lb


Product Identification
  • Manufacturer: Cutler Hammer
  • Family: CH Series
  • Model: CH390ST