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Q1B31001021

Square D
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Save $-178.37
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Square D Q1B31001021 is a 3-pole, 100 amp, 240V bolt-on molded case circuit breaker from the Q1B Series, designed to provide thermal magnetic overload and short-circuit protection for three-phase electrical systems. It features LI (Long-Time and Instantaneous) trip functions with a 10kA interrupting rating at 240V, ensuring reliable fault interruption. The unit weighs 2 lb and utilizes a bolt-on connection for secure mounting in panelboards. This breaker is UL and CSA listed, meeting industry standards for safety and performance in commercial and industrial environments. It is commonly used in distribution panels and motor control centers requiring dependable circuit protection.

Key Features & Specifications
  • Type: Molded Case
  • Manufacturer: Square D
  • Model: Q1B31001021
  • Series: Q1B
  • Current Rating: 100A
  • Voltage Rating: 240V
  • Poles: 3
  • Phase: 3
  • Protection: Thermal Magnetic
  • Trip Functions: LI - Long-Time and Instantaneous
  • Interrupt Rating: 10kA @ 240V
  • Mounting Type: Bolt-On
  • Connection: Bolt-On
  • Weight: 2 lb
  • Shunt Trip: Included
  • Certifications: UL/CSA listed


Square D Q1B31001021 - Molded Case 100A 240V 3-Pole