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Square D QOB340EPD - Ground Fault Breaker 40A 3-Pole

Square D
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Square D QOB340EPD is a 3-pole, bolt-on molded case circuit breaker designed for ground fault protection in QO Load Centers and NQ Panelboards. It is rated for 40A at 120/240VAC with a 10kA interrupting capacity at 120V, utilizing a thermal-magnetic trip mechanism for long-time and instantaneous protection. The unit measures 4.1 in x 2.2 in x 2.9 in (105 mm x 57 mm x 74 mm), weighs 1.313 lb, and features pressure plate terminals accepting wire sizes from 14 AWG to 6 AWG copper or 12 AWG to 4 AWG aluminum. It is UL Listed and CSA certified, operating within a temperature range of -13°F to 158°F (-25°C to 70°C). This Class A (5mA) ground fault circuit interrupter is suitable for industrial applications requiring reliable fault detection in three-phase systems.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Ground Fault Circuit Interrupter (Class A - 5mA)
  • Voltage Rating: 120/240VAC
  • Current Rating: 40A
  • Dimensions: 4.1 in (105 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Standards: UL Listed, CSA
  • Applications: QO Load Centers and NQ Panelboards
  • 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: 40A
  • AIC rating: 10kA@120V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: 100A/QO
  • Trip Type: Thermal Magnetic
  • Panel Type: QO Load Centers and NQ Panelboards
  • Breaker Type: Ground Fault Circuit Interrupter (Class A - 5mA)
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Min. Wire Size 12 AWG (Al), 14 AWG (Cu) Max. Wire Size 4 AWG (Al), 6 AWG (Cu)
  • 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: 60 Hz (assumed)
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not applicable
  • Full Load Amps: Not specified
  • Dist Voltage: Not specified
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 40A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: AWG 12 to AWG 4 Aluminum, AWG 14 to AWG 6 Copper
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Pressure Plate
  • Frequency Rating: 60 Hz (assumed)
  • Phase Connection: 3-Phase
  • Standards: CSA, UL Listed
  • Compatible Frames: 100A/QO
  • Installation Type: Bolt-On
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: 100A/QO
  • Current Rating: 40A
  • 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: 70°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 606486145671
  • GTIN: 03606490000000