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Square D QOB350EPD - Molded Case 50A 3-Pole Ground Fault Breaker

Square D
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Square D QOB350EPD is a 3-pole molded case circuit breaker from the QOB Series, designed for ground fault equipment protection in commercial and industrial power distribution systems. It is rated for 50A at 120/240VAC with a 10kA interrupt capacity at 120V, utilizing thermal magnetic trip protection with LI (Long-Time and Instantaneous) functions. The breaker measures 4.1 in (105 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) and weighs 1.331 lb, featuring a bolt-on connection with pressure plate terminals that accept wire sizes from 14 AWG to 6 AWG copper or 12 AWG to 4 AWG aluminum. It is UL Listed and CSA certified, with a minimum and maximum operating temperature of 104°F, and is designed for use in QO load centers and NQ panelboards. This 3-phase breaker is suitable for applications requiring reliable overcurrent and ground fault protection in industrial control panels and commercial electrical systems.

Key Features & Specifications
  • Type: QOB
  • Breaker Type: Ground Fault Equipment Protection
  • Current Rating: 50A
  • Voltage Rating: 120/240VAC
  • Poles: 3
  • Phase: 3
  • Frame Size: 100A/QO
  • Interrupt Rating: 10kA at 120V
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Connection: Bolt-On
  • Terminal Connection: Pressure Plate
  • Wire Size: Min. 14 AWG (Cu), 12 AWG (Al); Max. 6 AWG (Cu), 4 AWG (Al)
  • Panel Type: QO Load Centers and NQ Panelboards
  • Dimensions: 4.1 in (105 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (H x W x D)
  • Weight: 1.331 lb
  • Standards: CSA, UL Listed
  • Temp Rating: Min. 104°F, Max. 104°F
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901956976
  • GTIN: 00785901956976