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Square D QDF32125TS - Ground Fault Breaker 125A (3-Pole, 480Y/277V)

United Fuses
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Square D QDF32125TS is a 125-amp, 3-pole, 480Y/277-volt AC, 3-phase, 4-wire, bolt-on circuit breaker designed for use in Square D QO load centers and panelboards, providing ground fault protection for equipment. This unit features a 25-kiloamp interrupting capacity at 480Y/277 volts AC, a thermal-magnetic trip mechanism, and a compact frame size with a 5.19-pound weight. It is constructed with a metal enclosure and copper bus, rated for 60/75°C conductors, and complies with UL 489 and CSA standards. The breaker is suitable for industrial applications requiring ground fault protection on 3-phase, 4-wire wye systems, such as in commercial buildings, manufacturing facilities, and data centers. Its bolt-on mounting ensures a secure connection in QO panelboards, while the 125-amp continuous current rating supports heavy motor and equipment loads.

Key Features & Specifications
  • Type: Ground fault circuit breaker, thermal-magnetic trip, bolt-on mounting
  • Voltage Rating: 480Y/277 V AC
  • Current Rating: 125 A
  • Dimensions: Compact frame size
  • Standards: UL 489, CSA
  • Applications: Industrial ground fault protection for 3-phase, 4-wire wye systems
  • Switch Type: Bolt-on
  • Configuration: 3-pole, 4-wire
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: 60/75°C
  • Shipping Dimensions: Not specified
  • Phase: 3-phase
  • Voltage: 480Y/277 V AC
  • Amperage: 125 A
  • AIC rating: 25 kA at 480Y/277 V AC
  • Connection: Bolt-on
  • Poles: 3
  • Protection: Ground fault
  • Functions: Overcurrent and ground fault
  • Frame Size: QO
  • Trip Type: Thermal-magnetic
  • Panel Type: QO load centers and panelboards
  • Breaker Type: QDF
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Metal enclosure
  • Panel Style: Not specified
  • Bus Type: Copper
  • Fuse Class: Not applicable
  • Insulation Temperature: 60/75°C
  • 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
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: 125 A
  • Dist Voltage: 480Y/277 V AC
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: 125 A
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 125 A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Bolt-on
  • Wire Size: Not specified
  • Certification: UL 489, CSA
  • Circuit Breaker Mounting Style: Bolt-on
  • Terminal Connection: Not specified
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-phase, 4-wire wye
  • Standards: UL 489, CSA
  • Compatible Frames: QO
  • Installation Type: Bolt-on
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QO
  • Current Rating: 125 A
  • 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
  • Weight: 5.19 lb


Product Identification
  • UPC: Not specified
  • GTIN: Not specified