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Square D QOU3201021 - 3-Pole Circuit Breaker 20A 240V

Square D
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The Square D QOU3201021 is a three-pole molded case circuit breaker providing essential overcurrent protection for three-phase electrical systems. It is rated for 240V AC applications with a 20A current rating and features a thermal-magnetic trip mechanism for both long-time delay and instantaneous protection against overloads and short circuits. The compact bolt-on unit measures 102.87 mm H x 76.2 mm W x 74.93 mm D, weighs 1.5 lb, and operates reliably within a temperature range of -25 to 70 °C. Engineered to meet industry standards, it offers a 10kA interrupting capacity at 240V and is designed for integration into industrial control panels, commercial distribution equipment, and machinery panels where robust circuit protection is required.

Key Features & Specifications
  • Type: QOU Series, Molded Case, Thermal Magnetic Protection with LI (Long-time & Instantaneous) Trip
  • Voltage Rating: 240V AC
  • Current Rating: 20A
  • Dimensions: 4.05 in (102.87 mm) H x 3 in (76.2 mm) W x 2.95 in (74.93 mm) D
  • Standards: Industry Standard Compliance
  • Applications: Industrial Control Panels, Commercial Distribution, Machinery
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-On Connection
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Phase: 3
  • AIC Rating: 10kA @ 240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Wire Size: AWG 14 to AWG 2 (Aluminium/Copper)
  • Weight: 1.5 lb


Product Identification
  • UPC: 078590151856
  • GTIN: 00785901518563