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Square D QO170 - 70A Standard Circuit Breaker (1-Pole, 120/240V)

Square D
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Square D QO170 is a molded case circuit breaker designed to provide reliable overcurrent protection for residential and light commercial electrical circuits. It features a 70A current rating and a 120/240V voltage rating, housed within a compact plug-in unit measuring 79 mm H x 19 mm W x 74 mm D and weighing 0.311 lb. The breaker is constructed with a thermal-magnetic trip mechanism for both long-time and instantaneous protection, achieving a 10kA interrupting rating at 240V, and is certified to UL, CSA, and HACR standards for safety and compatibility with QO load centers and NQ panelboards. Its lug terminal connection accommodates wire sizes from 8 AWG to 2 AWG, making it suitable for feeder and branch circuit applications in single-phase systems.

Key Features & Specifications
  • Type: Standard, molded case, thermal-magnetic protection with LI (Long-time and Instantaneous) trip functions
  • Voltage Rating: 120/240V AC
  • Current Rating: 70A
  • Dimensions: 3.1 in H (79 mm) x 0.7 in W (19 mm) x 2.9 in D (74 mm)
  • Weight: 0.311 lb
  • Standards: UL Listed, CSA Certified, HACR
  • Applications: Feeder and branch circuit protection in QO load centers and NQ panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Phase: 1
  • AIC Rating: 10kA @ 240V
  • Connection: Plug-In, Lug terminal
  • Poles: 1
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: 100A/QO
  • Trip Type: Thermal Magnetic
  • Panel Type: QO Load Centers and NQ Panelboards
  • Breaker Type: Standard
  • Temp Rating: 40°C (104°F) maximum ambient
  • MCM Size: Accepts 8 AWG to 2 AWG wire
  • Certification: HACR, UL Listed
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Standards: CSA Certified, HACR, UL Listed
  • Compatible Frames: QO Series
  • Installation Type: Plug-In mount
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901477471
  • GTIN: 00785901477471