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E43B040L - Molded Case Circuit Breaker 40A 480V AC

United Fuses
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E43B040L is a molded case circuit breaker designed for primary overcurrent protection in industrial electrical distribution systems. It is rated for 480V AC and 40A continuous current, with a compact frame size that facilitates installation in standard panelboards. The unit features a thermal-magnetic trip mechanism for reliable short-circuit and overload protection, housed in a durable thermoplastic enclosure. This breaker complies with UL 489 and CSA C22.2 standards, ensuring safe operation in commercial and industrial environments. Typical applications include motor control centers, lighting panels, and branch circuit protection in manufacturing facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, thermal-magnetic trip, thermoplastic housing
  • Voltage Rating: 480V AC
  • Current Rating: 40A
  • Dimensions: Standard 1-inch pole width, 3.38-inch depth, 4.13-inch height
  • Standards: UL 489, CSA C22.2
  • Applications: Motor control centers, lighting panels, branch circuit protection
  • Weight: 5.19 lb
  • Breaker Type: E43B040L
  • Frame Size: 100A frame
  • Trip Type: Thermal-magnetic
  • Poles: 3-pole
  • Connection: Line and load side lugs
  • Mounting: Bolt-on
  • Frequency Rating: 50/60 Hz
  • Phase: 3-phase
  • AIC Rating: 10kA at 480V AC
  • Terminal Connection: Aluminum/copper rated
  • Installation Type: Panelboard
  • Circuit Breaker Mounting Style: Bolt-on
  • Certification: UL, CSA


Product Identification
  • UPC: 786725123456
  • GTIN: 00786725123456