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Square D QBA221251 - Molded Case Circuit Breaker 125A 240V 2-Pole

Square D
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Square D QBA221251 is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial and commercial electrical systems. It features a 125A current rating and a 240V AC voltage rating, with a 10kA interrupting capacity at 240V for robust fault protection. The breaker is constructed with a compact Q-frame size, measuring 164.34 mm H x 76.2 mm W x 99.82 mm D and weighing 4.93 lb, and utilizes a thermal-magnetic trip unit for combined long-time and instantaneous (LI) protection functions. It complies with UL, CSA, NEMA, and NOM-003-SCFI-2000 standards and is certified for use in single-phase AB line-to-line applications. This plug-in, I-Line style breaker is typically applied in panelboards and switchboards for branch circuit protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, I-Line Plug-In Connection
  • Voltage Rating: 240V AC
  • Current Rating: 125A
  • Dimensions: 164.34 mm H x 76.2 mm W x 99.82 mm D (6.47 in x 3 in x 3.93 in)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000
  • Applications: Industrial & Commercial Panelboards, Branch Circuit Protection
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Phase: 1
  • AIC Rating: 10kA @ 240V
  • Connection: I-Line Style, Lug Terminal
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous Trip (LI)
  • Frame Size: Q
  • Phase Connection: AB
  • Certification: UL, CSA, NOM
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901403807
  • GTIN: 00785901403807