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Zinsco QB50 - 50A 1-Pole Thermal Magnetic Breaker

Zinsco
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Zinsco QB50 is a single-pole molded case circuit breaker designed for overcurrent protection in residential and light commercial electrical panels. This 50A, 120V thermal-magnetic breaker provides long-time and instantaneous (LI) trip functions to safeguard branch circuits against overloads and short circuits. The bolt-on connection ensures a secure, stable installation within compatible Zinsco QB series panelboards, with a compact 1-pound frame. It carries a 10kA interrupting capacity at 240V and is rated for single-phase applications, meeting industry standards for reliable circuit interruption.

Key Features & Specifications
  • Type: QB Series Molded Case Circuit Breaker
  • Voltage Rating: 120V
  • Current Rating: 50A
  • Poles: 1
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 10kA@240V
  • Phase: 1
  • Functions: LI - Long-Time and Instantaneous
  • Weight: 1 lb
  • Family: QB Series
  • Item Subcategory: Molded Case
  • Manufacturer: Thomas & Betts||Zinsco


Product Identification
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