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Square D QHB320 - 3-Pole Thermal Magnetic Breaker (20A, 240V, 65kA AIC)

Square D
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Square D QHB320 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase electrical systems. It features a 20A current rating and a 240V AC voltage rating, housed within a compact, bolt-on configuration measuring 76 mm H x 57 mm W x 74 mm D and weighing 0.85 lb. This thermal-magnetic breaker offers both long-time and instantaneous (LI) trip functions, is UL Listed and CSA certified, and provides a 65kA interrupting capacity at 240V for robust short-circuit protection. It is engineered for industrial and commercial panelboards, switchboards, and motor control centers requiring dependable circuit isolation.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 240V AC
  • Current Rating: 20A
  • Dimensions: 3.0 in (76 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D
  • Standards: UL Listed, CSA Certified
  • Applications: Industrial Panelboards, Switchboards, Motor Control Centers
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-On
  • Phase: 3
  • Amperage: 20A
  • AIC rating: 65kA @ 240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: QOB Series
  • Trip Type: Thermal Magnetic
  • Breaker Type: QHB
  • Weight: 0.85 lb
  • Certification: UL Listed, CSA


Product Identification
  • UPC: 785901341666
  • GTIN: 00785901341666