CFD63B125L - 125A Circuit Breaker

CFD63B125L - 125A Circuit Breaker

Finding the right replacement circuit breaker can make all the difference when maintaining an existing power distribution system. The CFD63B125L is a 125 amp, 3-pole molded case circuit breaker from the Sentron CFD6 series, designed to provide the ratings, configuration, and compatibility required for many commercial and industrial electrical installations. Whether you're replacing a failed breaker during routine maintenance or sourcing components for a facility upgrade, matching the original specifications is essential—and that's where the CFD63B125L fits in.

This breaker features a fuseless current-limiting design and a non-interchangeable trip unit, helping maintain the original protection characteristics of compatible systems. With interrupting capacities of 200kA at 240VAC, 200kA at 480VAC, and 100kA at 600VAC, it is designed for applications where substantial fault-current protection is required. The included line-side and load-side terminals help streamline installation, while the HACR rating makes it suitable for a variety of HVAC and commercial applications.

For facility managers, electrical contractors, maintenance teams, and industrial operators, the CFD63B125L remains a practical solution when maintaining systems originally designed around the Sentron CFD6 platform. Like many molded case circuit breakers used throughout commercial and industrial facilities, it was built to last and continues to serve as a dependable component in power distribution equipment.

Key Features and Benefits

• 125 amp current rating for commercial and industrial power distribution applications
• 3-pole configuration designed for three-phase electrical systems
• Sentron CFD6 molded case circuit breaker
• Fuseless current-limiting construction
• Non-interchangeable trip unit
• Includes both line-side and load-side terminals
• HACR rated for compatible HVAC applications
• Suitable for 50/60Hz electrical systems
• Rated for operation in ambient temperatures up to 40°C (104°F)
• Designed to match existing CFD6 installations where form, fit, and function are critical
• Built to last in demanding commercial and industrial environments
  

Technical Specifications

• Part Number: CFD63B125L
  
• Series: Sentron CFD6
  
• Type: Molded Case Circuit Breaker
  
• Amperage: 125A
  
• Poles: 3
  
• Frequency: 50/60Hz
  
• Trip Unit: Non-Interchangeable
  
• Current Limiting: Fuseless Current Limiting
  
• HACR Rated: Yes
  
• Ambient Rating: 40°C (104°F)
  
• Interrupting Ratings (A.I.C.)
  • 200kA @ 240VAC
  • 200kA @ 480VAC
  • 100kA @ 600VAC
• Dimensions:
  • Width: 4.50 in.
  • Height: 14.25 in.
  • Depth: 4.00 in.
    
• Approximate Shipping Weight: 39 lbs.
  
• Line-Side Terminals: Included
  
• Load-Side Terminals: Included
  

Material Compliance and Certifications

• HACR Rated
• Designed for 50/60Hz operation
• Rated for use in ambient temperatures up to 40°C (104°F)

Where It Works Best

The CFD63B125L is commonly used in commercial facilities, manufacturing plants, distribution centers, institutional buildings, HVAC systems, switchgear, motor control equipment, and electrical distribution systems that require a 125 amp, 3-pole molded case circuit breaker. It is particularly well suited for maintenance, repair, and retrofit projects where preserving compatibility with existing Sentron CFD6 equipment is important.