FJ63B125 - 125Amp Circuit Breaker

FJ63B125 - 125Amp Circuit Breaker

The FJ63B125 is a 125 Amp, 3-pole molded case circuit breaker used in electrical equipment that requires an FJ6 frame breaker. It's typically installed as a replacement when servicing existing switchboards, panelboards, or other power distribution equipment where the original breaker needs to be matched. With a thermal magnetic trip mechanism and a non-interchangeable trip unit, the FJ63B125 is intended to protect your circuits from overloads and short circuits while matching the characteristics of the original installation. The breaker includes load-side lug terminals and is rated for 50/60Hz operation in 40°C ambient conditions.

Key Features and Benefits

• 125 Amp molded case circuit breaker
• Three-pole configuration for three-phase electrical systems
• FJ6 frame construction
• Thermal magnetic trip mechanism
• Non-interchangeable trip unit
• Includes load-side lug terminals
• Form, fit, and functional replacement for compatible FJ6 frame equipment
• Rated for 50/60Hz operation
• Suitable for installations with a 40°C ambient temperature
  

Technical Specifications

• Part Number: FJ63B125
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: FJ6
  
• Amperage: 125 Amps
  
• Poles: 3
  
• Trip Type: Thermal Magnetic
  
• Trip Unit: Non-Interchangeable
  
• Frequency: 50/60Hz
  
• Temperature Rating: 40°C
  
• Voltage Ratings:
  • 600VAC
  • 480VAC
  • 240VAC
• A.I.C. Ratings:
  • 18kA @ 600VAC
  • 25kA @ 480VAC
  • 25kA @ 240VAC
• Terminals: Includes Load-Side Lug Terminals
  
• Dimensions: 4.50"W × 9.50"H × 4.00"D
  
• Height: 9.5 in.
  
• Width: 4.5 in.
  
• Depth: 4.0 in.
  
• Approximate Shipping Weight: 14.00 lbs.
  

Material Compliance and Certifications

The FJ63B125 is intended for use in electrical equipment designed for a compatible FJ6 frame molded case circuit breaker.

Where It Works Best

• Commercial electrical distribution systems
• Industrial facilities
• Manufacturing plants
• Panelboards
• Switchboards
• Three-phase power distribution equipment