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Square D QOB370VH - 3-Pole Circuit Breaker 70A 120/240VAC

Square D
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Square D QOB370VH is a three-pole molded case circuit breaker designed to provide reliable overcurrent protection for three-phase electrical systems. It features a 70A current rating and a 120/240VAC voltage rating, housed within a compact 100A/QO frame measuring 79 mm x 57 mm x 74 mm (H x W x D) and weighing 1.06 lb. The breaker utilizes a thermal-magnetic trip mechanism for both long-time and instantaneous (LI) protection, achieving a 22kA interrupting rating at 240V, and is CSA and UL Listed for safety compliance. Its bolt-on connection with pressure plate terminals accommodates copper or aluminum conductors from #8 to 300 MCM, making it suitable for installation in Square D NQOD panelboards across commercial and industrial applications.

Key Features & Specifications
  • Type: Three-pole, molded case, thermal-magnetic circuit breaker with high interrupting capacity
  • Voltage Rating: 120/240V AC
  • Current Rating: 70A
  • Dimensions: 3.1 in (79 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D
  • Standards: CSA, UL Listed
  • Applications: Commercial and industrial three-phase power distribution
  • Switch Type: Circuit Breaker
  • Configuration: Three-pole
  • Temp Rating: 40°C (104°F) maximum ambient
  • Phase: 3
  • AIC Rating: 22kA @ 240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long-time and Instantaneous (LI)
  • Frame Size: 100A/QO
  • Panel Type: Square D NQOD Panelboards
  • Breaker Type: High Interrupting Capacity
  • MCM Size: Min. 4 AWG, Max. 300 MCM
  • Wire Size: #8 to #2 AWG, copper or aluminum
  • Certification: UL Listed
  • Terminal Connection: Pressure Plate
  • Family: QOB Series


Product Identification
  • UPC: 785901054849
  • GTIN: 00785901054849