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Square D QOB250H - Molded Case Circuit Breaker 50A 2-Pole

Square D
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Square D QOB250H is a 2-pole, 50A molded case circuit breaker from the QOB Series, designed for thermal-magnetic overcurrent protection in branch circuits. It operates at 120/240VAC with a 10kA interrupting capacity at 240V, and features a bolt-on connection with pressure plate terminals accepting 8 AWG to 2 AWG copper or aluminum wire. Measuring 3.1 in (79 mm) high by 1.5 in (38 mm) wide by 2.9 in (74 mm) deep and weighing 0.71 lb, this standard breaker provides long-time and instantaneous trip functions for single-phase applications. It is UL Listed and CSA certified, with an operating temperature range of -13°F to 158°F (-25°C to 70°C). This breaker is suitable for industrial panelboards and load centers requiring reliable overload and short-circuit protection.

Key Features & Specifications
  • Type: QOB, Molded Case, Standard Breaker
  • Voltage Rating: 120/240VAC
  • Current Rating: 50A
  • Dimensions: 3.1 in (79 mm) x 1.5 in (38 mm) x 2.9 in (74 mm) (H x W x D)
  • Standards: UL Listed, CSA
  • Applications: Industrial panelboards and load centers
  • Switch Type: Thermal Magnetic
  • Configuration: 2-Pole, 1-Phase
  • Coil Voltage Maximum: N/A
  • Temp Rating: -13°F to 158°F (-25°C to 70°C)
  • Shipping Dimensions: 3.1 in x 1.5 in x 2.9 in
  • Phase: 1
  • Voltage: 120/240VAC
  • Amperage: 50A
  • AIC rating: 10kA@240V
  • Connection: Bolt-On
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous Trip
  • Frame Size: QOB
  • Trip Type: Thermal Magnetic
  • Panel Type: QO
  • Breaker Type: Standard
  • Control Voltage Minimum: N/A
  • Control Voltage Maximum: N/A
  • MCM Size: Min. Wire Size 8 AWG (Cu/Al) Max. Wire Size 2 AWG (Cu/Al)
  • Metal Type: N/A
  • Panel Style: N/A
  • Bus Type: N/A
  • Fuse Class: N/A
  • Insulation Temperature: N/A
  • Inductance: N/A
  • Impedance: N/A
  • Barrels: N/A
  • Class Rating: N/A
  • Diameter: N/A
  • Velocity: N/A
  • Clip Center: N/A
  • Clas: N/A
  • Mounting: Bolt-On
  • Hz: 60
  • Coil Material: N/A
  • Horse Power: N/A
  • Aux Contacts: N/A
  • CPT: N/A
  • Full Load Amps: N/A
  • Dist Voltage: N/A
  • Bucket Size: N/A
  • Bucket Style: N/A
  • Bucket Type: N/A
  • Full Load Amp Maximum: N/A
  • Full Load Amp Minimum: N/A
  • Enclosure: N/A
  • Relay Style: N/A
  • Coil Voltage Minimum: N/A
  • Wire: N/A
  • Amperage Maximum: 50A
  • Amperage Minimum: N/A
  • Nema Rating: N/A
  • Switch Style: N/A
  • Wire Size: AWG 8 to AWG 2, Copper/Aluminum
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Pressure Plate
  • Frequency Rating: 60 Hz
  • Phase Connection: 1-Phase
  • Standards: CSA, UL Listed
  • Compatible Frames: QO
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: N/A
  • Breaker Frame: QOB
  • Current Rating: 50A
  • Reverse Standoff Voltage: N/A
  • Watts: N/A
  • Peak Pulse Current: N/A
  • Breakdown Voltage (MIN VBR@IT ) (V): N/A
  • Breakdown Voltage (VBR@IT) (V): N/A
  • Polarity: N/A
  • Operating Temperature Maximum Celsius: 70°C
  • Max Clamp Voltage: N/A
  • On-State Current: N/A


Product Identification
  • UPC: 785901335450
  • GTIN: 00785901335450