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Square D QO2HT - Miniature Circuit Breaker 100A 2-Pole

United Fuses
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Square D QO2HT is a two-pole, 120/240-volt AC miniature circuit breaker designed for overload and short-circuit protection in residential and light commercial load centers. This thermal-magnetic breaker is rated for 100 amps maximum and features a 10,000 AIC interrupting capacity, constructed with a compact 1-inch per pole frame and plug-on mounting for easy installation. It complies with UL 489 and CSA standards, ensuring reliable performance in branch circuit protection applications. Typical uses include protecting main distribution panels, subpanels, and high-demand circuits in industrial and commercial settings.

Key Features & Specifications
  • Type: Miniature Circuit Breaker, Thermal-Magnetic, Plug-On
  • Voltage Rating: 120/240 V AC
  • Current Rating: 100 A
  • Dimensions: 2-inch width (2-pole), 3-inch depth, 3-inch height
  • Standards: UL 489, CSA C22.2 No. 5
  • Applications: Branch circuit protection in load centers, panelboards, and subpanels
  • Switch Type: Toggle
  • Configuration: 2-Pole
  • Coil Voltage Maximum: 240 V AC
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 3.5 x 2.5 x 3.5 inches
  • Phase: Single Phase
  • Voltage: 120/240 V AC
  • Amperage: 100 A
  • AIC rating: 10 kA
  • Connection: Plug-On
  • Poles: 2
  • Protection: Overload and Short Circuit
  • Functions: Thermal-Magnetic Trip
  • Frame Size: QO
  • Trip Type: Fixed Thermal-Magnetic
  • Panel Type: QO Load Centers
  • Breaker Type: QO
  • Control Voltage Minimum: 120 V AC
  • Control Voltage Maximum: 240 V AC
  • MCM Size: Not applicable
  • Metal Type: Copper alloy contacts
  • Panel Style: Plug-On
  • Bus Type: Tin-plated copper
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: 1.0 inch
  • Clas: Not applicable
  • Mounting: Plug-On
  • Hz: 60 Hz
  • Coil Material: Copper
  • Horse Power: Not applicable
  • Aux Contacts: None
  • CPT: None
  • Full Load Amps: 100 A
  • Dist Voltage: 240 V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 100 A
  • Full Load Amp Minimum: 0 A
  • Enclosure: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: 120 V AC
  • Wire: Copper or aluminum
  • Amperage Maximum: 100 A
  • Amperage Minimum: 0 A
  • Nema Rating: Not applicable
  • Switch Style: Toggle
  • Wire Size: #14 to #3 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-On
  • Terminal Connection: Screw terminals
  • Frequency Rating: 60 Hz
  • Phase Connection: Single Phase
  • Standards: UL 489, CSA
  • Compatible Frames: QO
  • Installation Type: Plug-On
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QO
  • Current Rating: 100 A
  • 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: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable
  • Weight: 5.19 lb


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