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QB-70

Thomas & Betts
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Thomas & Betts QB-70 is a 1-pole molded case circuit breaker designed for overcurrent protection in electrical distribution systems. It is rated for 70A at 240V with a 10kA interrupting capacity at 120V, utilizing thermal magnetic protection with long-time and instantaneous trip functions (LI). The unit features a bolt-on connection, weighs 2 lb, and is constructed from durable thermoset plastic to resist dielectric breakdown after arcing. It complies with industry standards for use with 60°C or 75°C wire. This breaker is suitable for AC and DC systems in industrial and commercial applications requiring reliable switching and fault protection.

Key Features & Specifications
  • Manufacturer: Thomas & Betts
  • Part Number: QB-70
  • Item Subcategory: Molded Case
  • Family: QB Series
  • Type: QB
  • Amperage: 70 Amps
  • Voltage: 240 Volts
  • Poles: 1 Pole
  • Mounting Type: Bolt-On
  • Interrupt Rating: 10kA @ 120V
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Phase: 1
  • Weight: 2 lb
  • Material: Thermoset Plastic
  • Wire Rating: 60°C or 75°C


Thomas & Betts QB-70 - Molded Case Circuit Breaker 70A 240V