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Square D 42940 - Type C 40A Circuit Breaker (10kA I.C.)

Square D
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Square D 42940 is a Type C miniature circuit breaker designed to provide reliable overcurrent protection for industrial control circuits and equipment. It features a 10 kA interrupting capacity at 240V AC/50V DC and is rated for 40A continuous operation with a compact, DIN-rail mountable design that weighs 2 lb for easy integration into panels. This breaker complies with IEC 60947-2 standards and is typically applied in motor protection, transformer circuits, and lighting systems where selective coordination is required.

Key Features & Specifications
  • Type: Type C, Thermal-Magnetic, DIN-Rail Mount
  • Voltage Rating: 240V AC / 50V DC
  • Current Rating: 40A
  • Interrupting Rating: 10 kA
  • Standards: IEC 60947-2
  • Applications: Motor Protection, Transformer Circuits, Lighting Systems
  • Trip Type: Thermal-Magnetic
  • Mounting: DIN-Rail
  • Poles: 1
  • Family: Compact
  • Weight: 2 lb
  • Section: Connection Devices


Product Identification
  • GTIN: 00746071429400