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Square D QO2100-70S - 2-Pole Circuit Breaker 100A 120/240V

United Fuses
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Square D QO2100-70S is a 2-pole circuit breaker designed to provide overcurrent protection for branch circuits in residential and commercial load centers. It is rated for 100 amps at 120/240 volts AC with a 10kA interrupting rating, utilizing a thermal magnetic trip unit with long-time and instantaneous functions. The breaker weighs 5.19 lb and features a plug-in mounting style with box lug connections accepting AWG 4 to AWG 2/0 copper or aluminum wire. It is UL and CSA certified and meets HACR standards for heating, air conditioning, and refrigeration equipment. This breaker is typically used in QO series panels for protecting lighting, appliance, and power distribution circuits.

Key Features & Specifications
  • Type: 2-Pole Circuit Breaker
  • Amperage: 100 A
  • Voltage: 120/240 VAC
  • Interrupt Rating: 10kA at 120/240 VAC
  • Series/Frame: QO
  • Trip Unit: Thermal Magnetic with LI (Long-Time and Instantaneous)
  • Mounting Type: Plug-In
  • Connection Type: Box Lugs
  • Wire Gauge: AWG 4 to AWG 2/0 Copper or Aluminum
  • Certifications: UL, CSA
  • Standards: HACR
  • Weight: 5.19 lb