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Westinghouse JB3125S - Molded Case Circuit Breaker 125A 600V 3-Pole

Westinghouse
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Westinghouse JB3125S is a 3-pole molded case circuit breaker designed for overcurrent protection in low voltage power distribution systems. It is rated for 600V AC and 125A, with a thermal magnetic trip mechanism providing long-time and instantaneous protection (LI functions). This bolt-on unit weighs 19 lb and is part of the AB DE-ION family, featuring a 22kA interrupting capacity at 480V for robust short circuit handling. The breaker complies with industry standards for industrial and commercial electrical installations. Typical applications include motor control centers, panelboards, and switchboards requiring reliable overload and fault protection.

Key Features & Specifications
  • Manufacturer: Westinghouse
  • Item Subcategory: Molded Case
  • Family: AB DE-ION
  • Type: JB
  • Weight: 19 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 22kA@480V
  • Phase: 3
  • Current Rating: 125A
  • Part Number: JB3125S
  • Frame Size: 250A