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Zinsco QB40 - Molded Case Circuit Breaker 40A 1-Pole

Zinsco
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Zinsco QB40 is a molded case circuit breaker designed for providing reliable overcurrent protection in single-phase electrical systems. It features a 40A current rating and a 120V voltage rating, engineered to interrupt fault currents up to 10kA at 240V. This single-pole, bolt-on unit utilizes a thermal-magnetic protection mechanism with long-time and instantaneous (LI) trip functions for coordinated system protection. Constructed for durability, it complies with industry standards for safety and performance in industrial and commercial panel applications.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, QB Series, Thermal-Magnetic Protection
  • Voltage Rating: 120V AC
  • Current Rating: 40A
  • Poles: 1
  • Phase: 1
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Functions: LI (Long-Time and Instantaneous)
  • AIC Rating: 10kA @ 240V
  • Frame: QB
  • Item Subcategory: Molded Case
  • Weight: 1 lb