FJ3B125 - 125Amp Circuit Breaker

FJ3B125 - 125Amp Circuit Breaker

The FJ3B125 is a 125 Amp, 3-pole molded case circuit breaker used in electrical systems that require an FJ3 frame breaker. It is typically found in replacement and maintenance situations where the existing equipment needs a breaker with the same frame style, amp rating, and electrical characteristics. When you're working with installed electrical equipment, the right replacement usually comes down to matching the original specifications. The FJ3B125 combines a 125 Amp rating with a three-pole configuration and a 225 Ampere FJ frame, making it a practical choice for compatible applications where keeping the existing breaker setup is important.

Key Features and Benefits

• 125 Amp three-pole molded case circuit breaker
• FJ3 frame design for compatible electrical equipment
• 225 Ampere FJ frame configuration
• Rated for 600VAC, 480VAC, and 240VAC systems
• Three-pole design for three-phase electrical applications
• Helps maintain existing breaker configuration and panel layout
• Molded case construction built for continued service
• Used for replacement and maintenance projects
• Suitable for commercial and industrial electrical distribution systems
  

Technical Specifications

• Catalog Number: FJ3B125
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: FJ3
  
• Frame Size: 225 Ampere FJ Frame
  
• Amperage Rating: 125 Amps
  
• Poles: 3
  
• Voltage Ratings:
  • 600VAC
  • 480VAC
  • 240VAC
• A.I.C. Rating:
  • 14kA at 600VAC
  • 18kA at 480VAC
  • 22kA at 240VAC
• Temperature Rating: 40°C
  
• Breaker Type: Type ET Molded Case Circuit Breaker
  
• Dimensions: 4.50"W x 10.00"L x 4.00"D
  
• Height: 10.5 inches
  
• Width: 4.5 inches
  
• Depth: 4.0 inches
  
• Approximate Shipping Weight: 14 lbs
  

Material Compliance and Certifications

The FJ3B125 is a molded case circuit breaker intended for use in compatible electrical distribution equipment. It is commonly used for replacement and maintenance work where matching the existing breaker specifications is required.

Where It Works Best

• Existing electrical equipment using compatible FJ3 frame breakers
• Commercial and industrial power distribution systems
• Three-phase electrical applications requiring a 125 Amp breaker
• Electrical panels requiring a three-pole molded case circuit breaker
• Replacement of compatible FJ frame circuit breakers
• Maintenance projects where keeping the original equipment arrangement matters