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Square D 9998X62 - QO Miniature Circuit Breaker 20A 1-Pole

Square D
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Square D 9998X62 is a miniature circuit breaker designed for overcurrent protection in electrical distribution systems. It operates at a voltage rating of 277/480V AC and a current rating of 20A, with a 10kA interrupting capacity at 480V AC. The unit measures 1.44 in (36.58 mm) in height, 1.98 in (50.29 mm) in width, and 4.25 in (107.95 mm) in depth, weighing 0.34 lb, and features a compact molded case construction with a thermal-magnetic trip mechanism. It complies with UL 489 and CSA C22.2 No. 5 standards, ensuring reliable performance in industrial environments. Typical applications include branch circuit protection in panelboards, lighting panels, and control panels within commercial and industrial facilities.

Key Features & Specifications
  • Type: Miniature circuit breaker, thermal-magnetic, molded case
  • Voltage Rating: 277/480V AC
  • Current Rating: 20A
  • Dimensions: 1.44 in (36.58 mm) x 1.98 in (50.29 mm) x 4.25 in (107.95 mm) (Height x Width x Depth)
  • Standards: UL 489, CSA C22.2 No. 5
  • Applications: Branch circuit protection in panelboards, lighting panels, control panels
  • Switch Type: Toggle
  • Configuration: 1-pole
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 1.44 in x 1.98 in x 4.25 in
  • Phase: 1
  • Voltage: 277/480V AC
  • Amperage: 20A
  • AIC rating: 10kA at 480V AC
  • Connection: Line and load terminals
  • Poles: 1
  • Protection: Overcurrent
  • Functions: Overload and short-circuit protection
  • Frame Size: QO
  • Trip Type: Thermal-magnetic
  • Panel Type: QO load centers
  • Breaker Type: QO
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Molded case
  • Panel Style: Plug-on
  • Bus Type: Plug-on
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°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-on
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not applicable
  • Aux Contacts: Not applicable
  • CPT: Not applicable
  • Full Load Amps: Not applicable
  • Dist Voltage: Not applicable
  • 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: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not applicable
  • Amperage Maximum: 20A
  • Amperage Minimum: Not applicable
  • Nema Rating: Not applicable
  • Switch Style: Toggle
  • Wire Size: 14 AWG to 8 AWG
  • Certification: UL listed, CSA certified
  • Circuit Breaker Mounting Style: Plug-on
  • Terminal Connection: Screw
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single-phase
  • Standards: UL 489, CSA C22.2 No. 5
  • Compatible Frames: QO
  • Installation Type: Plug-on
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QO
  • Current Rating: 20A
  • 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: 78590154880
  • GTIN: 00785901548805