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Square D QO442L225RB - Main Lug Load Center 225A 120/240V

Square D
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Square D QO442L225RB is a 225A main lug load center designed for use as a downstream distribution panel in residential and light commercial applications. It operates at 120/240V AC, single-phase, with a maximum current rating of 225A and a short-circuit current rating (AIC) of 10kA. The unit features a 42-space, 42-circuit configuration with a NEMA 1 indoor enclosure constructed from galvanized steel, weighing 5.19 lb. It is UL listed and compliant with NEC standards, suitable for use with copper or aluminum conductors. This load center is typically employed for branch circuit distribution in multi-family dwellings, small offices, or workshops where main breaker protection is provided upstream.

Key Features & Specifications
  • Type: Main lug load center, indoor, NEMA 1 enclosure
  • Voltage Rating: 120/240V AC
  • Current Rating: 225A
  • Dimensions: 42-space, 42-circuit configuration
  • Standards: UL 67, UL listed
  • Applications: Residential and light commercial distribution
  • Switch Type: Main lug only
  • Configuration: Single-phase, 3-wire
  • Coil Voltage Maximum: Not applicable (no coil)
  • Temp Rating: 75°C
  • Shipping Dimensions: Not specified
  • Phase: Single-phase
  • Voltage: 120/240V AC
  • Amperage: 225A
  • AIC rating: 10kA
  • Connection: Copper/aluminum conductors
  • Poles: 2-pole
  • Protection: Overcurrent protection via branch breakers
  • Functions: Distribution
  • Frame Size: QO
  • Trip Type: Not applicable (main lug)
  • Panel Type: Load center
  • Breaker Type: QO (compatible)
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Galvanized steel
  • Panel Style: Indoor
  • Bus Type: Tin-plated aluminum
  • 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: Surface or flush
  • Hz: 60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not applicable
  • Aux Contacts: Not applicable
  • CPT: Not applicable
  • Full Load Amps: Not applicable
  • Dist Voltage: 120/240V AC
  • 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: NEMA 1
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper/aluminum
  • Amperage Maximum: 225A
  • Amperage Minimum: Not applicable
  • Nema Rating: NEMA 1
  • Switch Style: Main lug
  • Wire Size: #14 to #4/0 AWG
  • Certification: UL listed
  • Circuit Breaker Mounting Style: Plug-on
  • Terminal Connection: Mechanical lugs
  • Frequency Rating: 60 Hz
  • Phase Connection: Single-phase
  • Standards: UL 67, NEC
  • Compatible Frames: QO
  • Installation Type: Indoor
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QO
  • Current Rating: 225A
  • 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


Product Identification
  • UPC: 785901972500
  • GTIN: