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Square D QDA221251 - Molded Case Circuit Breaker 125A 240V

Square D
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Square D QDA221251 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, housed within a compact 250A frame with dimensions of 164.34 mm H x 76.2 mm W x 99.82 mm D and a weight of 4.65 lb. This thermal magnetic breaker, which offers long-time and instantaneous (LI) trip functions, is constructed for plug-in connection to I-Line panelboards and operates within a temperature range of -25 to 70 °C. It complies with UL, CSA, NEMA, and NOM standards and is rated for an interrupting capacity of 25kA at 240V, making it suitable for protecting feeder and branch circuits in single-phase applications.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Standard, Thermal Magnetic Protection with LI (Long-time and Instantaneous) Trip
  • Voltage Rating: 240V AC
  • Current Rating: 125A
  • Frame Size: 250A/QD
  • Poles: 2
  • AIC Rating: 25kA @ 240V
  • Connection: Plug-In Panelboard with Lug Terminals
  • Phase: 1 (Phase Connection AB)
  • Panel Type: I-Line Panelboards
  • 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)
  • Weight: 4.65 lb
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • MCM Size: Accepts 4 AWG to 300 MCM Wire
  • Standards & Certification: UL, CSA, NEMA, NOM-003-SCFI-2000
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901462453
  • GTIN: 00785901462453