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Square D QOB250SWN1021 - Molded Case 50A 2-Pole Breaker

Square D
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Square D QOB250SWN1021 is a 50A, 2-pole bolt-on molded case circuit breaker from the QOB Series, designed for overcurrent protection in residential and commercial load centers. It operates at 120/240VAC with a 10kA interrupting capacity at 120V, utilizing thermal-magnetic protection for LI (Long-Time and Instantaneous) functions. The unit measures 3.1 in (79 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) and weighs 1.06 lb, featuring a pressure plate terminal connection for secure wiring. It is UL Listed and CSA certified, ensuring compliance with North American electrical standards. This breaker is typically applied in single-phase panelboards for branch circuit protection in lighting, appliance, and motor control systems.

Key Features & Specifications
  • Type: QOB Molded Case Circuit Breaker
  • Voltage Rating: 120/240VAC
  • Current Rating: 50A
  • 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 residential and commercial load centers
  • Switch Type: Bolt-On
  • Configuration: 2-Pole
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 1
  • Amperage: 50A
  • AIC rating: 10kA@120V
  • Connection: Bolt-On
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: QOB
  • Trip Type: Thermal Magnetic
  • Panel Type: Not specified
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • 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: 60 Hz (typical for 120/240VAC)
  • Coil Material: Not applicable
  • 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 applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 50A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: Not specified
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Pressure Plate
  • Frequency Rating: 60 Hz (typical)
  • Phase Connection: Single Phase
  • Standards: CSA, UL Listed
  • Compatible Frames: QOB Series
  • Installation Type: Bolt-On
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QOB
  • Current Rating: 50A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: Not specified
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not available
  • GTIN: Not available