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Square D QOB350EPD - Molded Case 50A 3-Pole GFEP Breaker

Square D
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The Square D QOB350EPD is a 3-pole, bolt-on molded case circuit breaker from the QOB series, designed to provide ground fault equipment protection for electrical systems. It carries a current rating of 50A and a voltage rating of 120/240VAC, with an AIC rating of 10kA at 120V, and utilizes thermal magnetic protection with LI (Long-Time and Instantaneous) functions. Physically, it measures 4.1 in (105 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (Height x Width x Depth), weighs 1.331 lb, and features pressure plate terminal connections accommodating wire sizes from 14 AWG (Cu) to 4 AWG (Al) and 12 AWG (Al) to 6 AWG (Cu). This breaker is UL Listed and CSA certified, with a minimum and maximum operating temperature of 104°F, and is compatible with QO Load Centers and NQ Panelboards. It is typically applied in industrial settings requiring ground fault protection for three-phase equipment.

Key Features & Specifications
  • Type: QOB Molded Case Circuit Breaker, Bolt-On, Ground Fault Equipment Protection
  • Voltage Rating: 120/240VAC
  • Current Rating: 50A
  • Dimensions: 4.1 in (105 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Standards: UL Listed, CSA
  • Applications: Industrial ground fault protection for three-phase equipment
  • Switch Type: Thermal Magnetic
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not specified
  • Temp Rating: Minimum 104°F, Maximum 104°F
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: 120/240VAC
  • Amperage: 50A
  • AIC rating: 10kA@120V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: 100A/QO
  • Trip Type: Thermal Magnetic
  • Panel Type: QO Load Centers and NQ Panelboards
  • Breaker Type: Ground Fault Equipment Protection
  • Control Voltage Minimum: Not specified
  • Control Voltage Maximum: Not specified
  • MCM Size: Min. Wire Size 12 AWG (Al), 14 AWG (Cu) Max. Wire Size 4 AWG (Al), 6 AWG (Cu)
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not specified
  • Insulation Temperature: Not specified
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not specified
  • Class Rating: Not specified
  • Diameter: Not specified
  • Velocity: Not specified
  • Clip Center: Not specified
  • Clas: Not specified
  • Mounting: Bolt-On
  • Hz: Not specified
  • Coil Material: Not specified
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: Not specified
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not specified
  • Coil Voltage Minimum: Not specified
  • Wire: Not specified
  • Amperage Maximum: Not specified
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: AWG 12 AWG 4 aluminium, AWG 14 AWG 6 copper
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Pressure Plate
  • Frequency Rating: Not specified
  • Phase Connection: 3-Phase
  • Standards: CSA, UL Listed
  • Compatible Frames: 100A/QO
  • Installation Type: Bolt-On
  • Item QTY: Not specified
  • Nema Starter Size: Not specified
  • Breaker Frame: QO
  • Current Rating: 50A
  • Reverse Standoff Voltage: Not specified
  • Watts: Not specified
  • Peak Pulse Current: Not specified
  • Breakdown Voltage (MIN VBR@IT ) (V): Not specified
  • Breakdown Voltage (VBR@IT) (V): Not specified
  • Polarity: Not specified
  • Operating Temperature Maximum Celsius: Not specified
  • Max Clamp Voltage: Not specified
  • On-State Current: Not specified


Product Identification
  • UPC: 785901956976
  • GTIN: 00785901956976