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Cutler Hammer CH340ST - 3-Pole 40A Circuit Breaker (240V, 10kA AIC)

Cutler Hammer
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Cutler Hammer CH340ST is a molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection for three-phase industrial electrical systems. It features a 40A current rating and a 240V AC voltage rating, housed in a compact CH frame with dimensions of 4.5" x 3.5" x 4.5" (LxHxW) and a plug-in connection for simplified installation. The breaker utilizes a thermal-magnetic trip unit offering both long-time and instantaneous trip functions, is UL 489 listed, and provides an interrupting capacity of 10kA at 240V. Its construction supports copper or aluminum conductors from #10 to 1/0 AWG and operates effectively in ambient temperatures from -25°C to 70°C (-13°F to 158°F), making it suitable for a range of commercial and industrial panelboards and switchgear.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Plug-In Connection
  • Voltage Rating: 240V AC
  • Current Rating: 40A
  • Dimensions: 4.5 in (Length/Depth) x 3.5 in (Height) x 4.5 in (Width)
  • Standards: UL 489
  • Applications: Industrial Panelboards, Switchgear, 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
  • Connection: Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: CH
  • Wire Size: #10 to 1/0 AWG, Copper or Aluminum
  • Certification: UL 489
  • Family: CH Series
  • Weight: 1.15 lb


Product Identification
  • UPC: 782113322124
  • GTIN: 00782113322124