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Siemens J3B125 - Molded Case 125A 3-Pole 600V

Siemens
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Siemens J3B125 Circuit Breaker - Molded Case 125A 3-Pole 600V Thermal Magnetic The Siemens J3B125 is a 3-pole molded case circuit breaker from the J Frame family, designed to provide LI (Long-Time and Instantaneous) protection for industrial electrical systems. It is rated for 600V AC, 125A continuous current, and operates on a 3-phase system with a thermal magnetic trip mechanism for reliable overcurrent and short-circuit protection. This bolt-on breaker weighs 17 lb and features a compact J-type frame construction suitable for panelboard and switchboard installations. It complies with UL and CSA standards for industrial power distribution applications. Typical applications include motor control centers, lighting panels, and distribution boards in manufacturing facilities and commercial buildings.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, J Frame, Thermal Magnetic
  • Voltage Rating: 600V AC
  • Current Rating: 125A
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic (LI - Long-Time and Instantaneous)
  • Weight: 17 lb
  • Family: J Frame
  • Type: J
  • Functions: LI - Long-Time and Instantaneous
  • Item Subcategory: Molded Case


Product Identification
  • Manufacturer: Siemens
  • Model: J3B125