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Square D QO3501021 - Molded Case 50A 3-Pole Shunt Trip

Square D
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The Square D QO3501021 is a 3-pole molded case circuit breaker from the QO Series, designed to provide overcurrent protection through a thermal magnetic trip mechanism. It is rated for 50A at 240V AC with a 10kA interrupting capacity, and it operates as a shunt trip breaker for remote disconnection. This plug-in unit measures 3.1 in x 3.0 in x 2.9 in (79 mm x 76 mm x 74 mm) and weighs 1.17 lb, featuring lug terminals that accept wire sizes from 8 AWG to 2 AWG. The breaker is UL Listed and CSA Certified, compliant with industry standards for use in QO Load Centers and NQ Panelboards. It is typically applied in commercial and industrial electrical distribution systems requiring reliable branch circuit protection and remote tripping capability.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, QO Series, Shunt Trip
  • Voltage Rating: 240V AC
  • Current Rating: 50A
  • Dimensions: 3.1 in (79 mm) x 3.0 in (76 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Standards: UL Listed, CSA Certified
  • Applications: Commercial and industrial electrical distribution
  • Switch Type: Shunt Trip
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not specified
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: 240V
  • Amperage: 50A
  • AIC rating: 10kA@240V
  • Connection: Plug-In
  • 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: 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: 3-Phase
  • Standards: UL Listed, CSA Certified
  • 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: 785901494157
  • GTIN: 00785901494157