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Square D QOB330EPD - Molded Case 30A 3-Pole Breaker

Square D
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The Square D QOB330EPD is a 3-pole molded case circuit breaker from the QOB Series, designed to provide thermal-magnetic overcurrent protection for branch circuits. This unit is rated for 30A at 120V AC with a 10kA interrupting capacity, supporting 3-phase systems and accepting wire sizes from AWG 14 to AWG 8 for copper or aluminum conductors. The plug-in connection design and compact dimensions of 4.1 in x 2.2 in x 2.9 in (105 mm x 57 mm x 74 mm) allow for straightforward installation into compatible QO load centers, with an operating temperature range of -13°F to 158°F (-25°C to 70°C). It features LI (Long-Time and Instantaneous) trip functions for precise protection coordination, meeting industry standards for industrial and commercial applications. This breaker is suited for use in lighting, appliance, and motor branch circuits where reliable overcurrent protection is required.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, QOB Series, Plug-In Connection
  • Voltage Rating: 120V AC
  • Current Rating: 30A
  • 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 Certified
  • Applications: Industrial and commercial branch circuit protection for lighting, appliances, and motors
  • Switch Type: Thermal-Magnetic
  • Configuration: 3-Pole, 3-Phase
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: -13°F to 158°F (-25°C to 70°C)
  • Shipping Dimensions: 4.1 in x 2.2 in x 2.9 in
  • Phase: 3
  • Voltage: 120V
  • Amperage: 30A
  • AIC rating: 10kA@120V
  • Connection: Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Frame Size: QOB
  • Trip Type: Thermal-Magnetic
  • Panel Type: QO Load Centers
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Copper/Aluminum compatible
  • Panel Style: QO
  • Bus Type: Plug-On
  • Fuse Class: Not applicable
  • Insulation Temperature: 75°C
  • 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: Plug-In
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 30A
  • Dist Voltage: 120V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 30A
  • Full Load Amp Minimum: 30A
  • Enclosure: Open (for panel mounting)
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper/Aluminum
  • Amperage Maximum: 30A
  • Amperage Minimum: 30A
  • Nema Rating: Not applicable
  • Switch Style: Thermal-Magnetic
  • Wire Size: AWG 14 to AWG 8
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: QO Load Centers
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QOB
  • Current Rating: 30A
  • 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: 785901982739
  • GTIN: 00785901982739