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Square D QO2501021 - Molded Case Circuit Breaker 50A 2-Pole

Square D
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The Square D QO2501021 is a 2-pole molded case circuit breaker designed for overcurrent and short-circuit protection in residential and commercial power distribution systems. This 50A unit operates at 120/240V with a 10kA interrupting capacity at 240V, utilizing a thermal-magnetic trip mechanism for long-time and instantaneous fault response. The plug-in style breaker measures 3.1 in (79 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) and weighs 0.94 lb, featuring lug terminals that accept wire sizes from 8 AWG to 2 AWG. It is UL Listed and CSA Certified for use in QO Load Centers and NQ Panelboards, with a shunt trip function for remote disconnection. This breaker is suitable for single-phase applications requiring reliable branch circuit protection in industrial control panels and lighting distribution systems.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic, Plug-In
  • Voltage Rating: 120/240V
  • 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 Certified, UL Listed
  • Applications: Residential and commercial power distribution, industrial control panels
  • Switch Type: Shunt Trip
  • Configuration: 2-Pole, 1-Phase
  • Coil Voltage Maximum: Not specified
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 1
  • Voltage: 120/240V
  • Amperage: 50A
  • AIC rating: 10kA@240V
  • Connection: Plug-In
  • Poles: 2
  • 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: Shunt Trip
  • Control Voltage Minimum: Not specified
  • Control Voltage Maximum: Not specified
  • MCM Size: Min. Wire Size 8 AWG Max. Wire Size 2 AWG
  • 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: Plug-In
  • 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: 50A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Shunt Trip
  • Wire Size: 8 AWG to 2 AWG
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: Lug
  • Frequency Rating: Not specified
  • Phase Connection: 1-Phase
  • Standards: CSA Certified, UL Listed
  • Compatible Frames: QO
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not specified
  • Breaker Frame: 100A/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: 785901494010
  • GTIN: 00785901494010