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Square D QOB31001021 - 100A 3-Pole Shunt Trip Circuit Breaker

Square D
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Square D QOB31001021 is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in three-phase electrical systems. It features a 100A current rating and a 120/240VAC voltage rating, housed within a compact 3.5 in (89 mm) x 3.0 in (76 mm) x 2.9 in (74 mm) frame with a bolt-on connection and pressure plate terminals. This thermal-magnetic breaker is CSA and UL Listed, ensuring compliance with industry safety standards for use in Square D NQOD panelboards within commercial and industrial facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Shunt Trip, Thermal-Magnetic Protection
  • Voltage Rating: 120/240VAC
  • Current Rating: 100A
  • Dimensions: 3.5 in H x 3.0 in W x 2.9 in D (89 mm x 76 mm x 74 mm)
  • Standards: CSA, UL Listed
  • Applications: Commercial and Industrial Panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-On
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Phase: 3
  • AIC Rating: 10kA @ 240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: 100A/QO
  • Panel Type: Square D NQOD Panelboards
  • Breaker Type: Shunt Trip
  • Wire Size: AWG 4 to AWG 2/0, Copper/Aluminum
  • Certification: UL Listed
  • Terminal Connection: Pressure Plate
  • MCM Size: Min. 4 AWG, Max. 2 AWG
  • Weight: 1.35 lb


Product Identification
  • UPC: 785901031024
  • GTIN: 00785901031024