Square D QOB350VH1021 - Molded Case 50A 3-Pole Breaker
Square D QOB350VH1021 - Molded Case 50A 3-Pole Breaker

Square D QOB350VH1021 - Molded Case 50A 3-Pole Breaker

Square D
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The Square D QOB350VH1021 is a 3-pole molded case circuit breaker from the QOB Series, designed for non-automatic protection in industrial power distribution systems. It is rated for 50A at 120/240VAC with a 22kA interrupting capacity at 240V, utilizing long-time and instantaneous trip functions for reliable overcurrent protection. This bolt-on breaker features a pressure plate terminal connection compatible with AWG 8 to AWG 2 copper or aluminum wire, measures 3.1 in (79 mm) x 3.0 in (76 mm) x 2.9 in (74 mm) (H x W x D), and weighs 1.4 lb. It is UL Listed and CSA certified, with an operating temperature range of -13°F to 158°F (-25°C to 70°C). Typical applications include industrial control panels, switchboards, and commercial electrical systems requiring a 3-phase, non-automatic disconnect.

Key Features & Specifications
  • Type: Molded Case, Non-Automatic
  • Voltage Rating: 120/240VAC
  • 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: CSA, UL Listed
  • Applications: Industrial control panels, switchboards, commercial electrical systems
  • Switch Type: Bolt-On
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: -13°F to 158°F (-25°C to 70°C)
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: 120/240VAC
  • Amperage: 50A
  • AIC rating: 22kA@240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Non-Automatic
  • Functions: Long-Time and Instantaneous Trip
  • Frame Size: Not specified
  • Trip Type: Long-Time and Instantaneous
  • Panel Type: Not specified
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Bolt-On
  • Hz: 50/60 Hz (assumed)
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: Not applicable
  • Dist Voltage: Not applicable
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: Not applicable
  • Full Load Amp Minimum: Not applicable
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: AWG 8 to AWG 2, Copper/Aluminum
  • Amperage Maximum: 50A
  • Amperage Minimum: Not applicable
  • Nema Rating: Not specified
  • Switch Style: Not applicable
  • Wire Size: AWG 8 to AWG 2
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Pressure Plate
  • Frequency Rating: 50/60 Hz (assumed)
  • Phase Connection: 3-Phase
  • Standards: CSA, UL Listed
  • Compatible Frames: Not specified
  • Installation Type: Bolt-On
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Not specified
  • Current Rating: 50A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • 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: 70°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 785901090250