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Square D QO220EM - Molded Case 20A 120/240V Breaker

Square D
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Square D QO220EM Circuit Breaker is a molded case circuit breaker designed for overcurrent protection in residential and light commercial electrical systems. It is rated for 120/240V AC at 20 amps, providing reliable branch circuit protection against overloads and short circuits. The breaker features a compact thermoplastic construction with a 7 lb weight, utilizing a thermal-magnetic trip mechanism for precise current interruption. It complies with UL 489 and CSA C22.2 standards, ensuring safe operation in accordance with North American electrical codes. This breaker is commonly used in Square D QO load centers for lighting, appliance, and general-purpose circuits in industrial and commercial panelboards.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Trip
  • Voltage Rating: 120/240V AC
  • Current Rating: 20 Amps
  • Dimensions: Standard QO 1-inch per pole width
  • Standards: UL 489, CSA C22.2
  • Applications: Branch circuit protection in QO load centers
  • Switch Type: Toggle
  • Configuration: 1-Pole
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: Standard QO package
  • Phase: Single
  • Voltage: 120/240V AC
  • Amperage: 20 A
  • AIC rating: 10 kA at 120/240V AC
  • Connection: Plug-on
  • Poles: 1
  • Protection: Overload and short circuit
  • Functions: Overcurrent protection
  • Frame Size: QO
  • Trip Type: Thermal-magnetic
  • Panel Type: QO load center
  • Breaker Type: QO
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Copper alloy contacts
  • Panel Style: Plug-on neutral compatible
  • Bus Type: Tin-plated copper
  • Fuse Class: Not applicable
  • Insulation Temperature: 75°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Standard QO
  • Clas: Not applicable
  • Mounting: Plug-on
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: 1 HP at 120V, 2 HP at 240V
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 20 A
  • Dist Voltage: 120/240V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 20 A
  • Full Load Amp Minimum: 0 A
  • Enclosure: Open style
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: 14-8 AWG copper/aluminum
  • Amperage Maximum: 20 A
  • Amperage Minimum: 0 A
  • Nema Rating: Not applicable
  • Switch Style: Toggle
  • Wire Size: 14-8 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-on
  • Terminal Connection: Screw terminals
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: QO
  • Installation Type: Plug-on
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QO
  • Current Rating: 20 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


Product Identification
  • UPC: 785901123456
  • GTIN: 00785901123456