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Square D QOB3405238 - 3-Pole 40A Molded Case Breaker

Square D
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The Square D QOB3405238 is a three-pole molded case circuit breaker designed for overcurrent protection in commercial and industrial power distribution systems. It is rated for 40A at 120/240VAC with a 10kA interrupting capacity at 120V, providing long-time and instantaneous (LI) protection through a thermal magnetic trip mechanism. This bolt-on breaker measures 3.1 in x 2.2 in x 2.9 in (79 mm x 57 mm x 74 mm) and weighs 0.83 lb, featuring a pressure plate terminal connection for secure wiring. It is UL Listed and CSA certified, complying with North American safety standards for reliable performance. Typical applications include branch circuit protection in panelboards, lighting panels, and industrial control panels requiring three-phase, 40A overcurrent protection.

Key Features & Specifications
  • Type: QOB Molded Case Circuit Breaker, thermal magnetic protection
  • Voltage Rating: 120/240VAC
  • Current Rating: 40A
  • Dimensions: 3.1 in (79 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Standards: CSA, UL Listed
  • Applications: Branch circuit protection in panelboards, lighting panels, industrial control panels
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • AIC rating: 10kA@120V
  • Phase: 3
  • Terminal Connection: Pressure Plate
  • Weight: 0.83 lb
  • Family: QOB Series
  • Country of Origin: Mexico
  • Item Subcategory: Molded Case


Product Identification
  • UPC: 785901090236
  • GTIN: 00785901000000