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Square D Q1290 - 90A 2-Pole Thermal Magnetic Circuit Breaker

Square D
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Square D Q1290 is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial and commercial electrical systems. It features a 90A current rating and a 240V AC voltage rating, housed within a compact, 2-pole plug-in configuration for straightforward panel installation. The breaker utilizes a thermal-magnetic trip mechanism offering both long-time and instantaneous (LI) protection functions and is constructed to meet rigorous industry standards with a 10kA interrupting capacity at 240V. This unit is typically applied in single-phase distribution panels, switchboards, and motor control centers where robust circuit protection is required.

Key Features & Specifications
  • Type: Q1 Series Molded Case Circuit Breaker, Thermal-Magnetic Protection
  • Voltage Rating: 240V AC
  • Current Rating: 90A
  • Poles: 2
  • Connection: Plug-In
  • Phase: 1
  • AIC Rating: 10kA @ 240V
  • Protection Functions: LI (Long-Time and Instantaneous)
  • Frame: Q1
  • Item Subcategory: Molded Case
  • Weight: 2 lb


Product Identification
  • Manufacturer Part Number: Q1290