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Siemens QJ3B125 - Molded Case Breaker 125A 240V 3-Pole

Siemens
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Siemens QJ3B125 is a 3-pole molded case circuit breaker from the QJ Series, designed for three-phase thermal-magnetic protection in commercial and industrial electrical systems. It delivers 125A of current at 240V with a 10kA interrupting rating, utilizing LI (Long-Time and Instantaneous) trip functions for coordinated overload and short circuit response. The unit features a bolt-on connection for secure mounting, weighs 4 lb, and is engineered for compact installation in panelboards. It complies with UL standards for reliable circuit protection in three-phase applications.

Key Features & Specifications
  • Type: QJ
  • Amperage: 125 Amps
  • Voltage: 240 Volts AC
  • Poles: 3 Pole
  • Mounting Type: Bolt-On
  • Interrupt Rating: 10kA at 240V
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Phase: 3
  • Weight: 4 lb
  • Series/Frame: Siemens QJ
  • Application: Three-phase circuit protection
  • Durable construction for industrial use
  • Compact design for space efficiency
  • Clear status indicators
  • Certifications: UL Listed