FXD63B125L - 125Amp Circuit Breaker

FXD63B125L - 125Amp Circuit Breaker

The Siemens FXD63B125L is a 125 Amp, 3-pole molded case circuit breaker designed for use in Sentron FD-frame electrical distribution systems. It's commonly installed as a replacement when an existing breaker needs to match the original frame size, amperage, and interrupting rating. Keeping those specifications the same helps maintain the existing panel configuration without changing the electrical design.

You'll typically find this breaker protecting three-phase feeders, branch circuits, distribution equipment, and other commercial or industrial loads operating on systems up to 600VAC.

Key Features and Benefits

• 125 Amp, 3-pole molded case circuit breaker
• Designed for Siemens Sentron FD-frame electrical systems
• Thermal magnetic trip protection against overloads and short circuits
• Rated for systems up to 600VAC
• Includes factory-installed line and load lugs (TA1FD350A)
• Accepts both copper and aluminum conductors
  

Technical Specifications

• Catalog Number: FXD63B125L
  
• Manufacturer Part Number (MFN): FXD63B125L
  
• Manufacturer: Siemens
  
• Product Family: Sentron FD6
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: FD
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Non-Interchangeable
  
• Amperage Rating: 125 Amps
  
• Voltage Rating: 600VAC
  
• Poles: 3
  
• Interrupt Rating: 22 kAIC @ 600VAC; 35 kAIC @ 480VAC
  
• Ambient Temperature Rating: 40°C
  
• Terminal Type: Line and Load Lugs (TA1FD350A)
  
• Copper Wire Range: 6 AWG–350 kcmil
  
• Aluminum Wire Range: 4 AWG–350 kcmil
  
• Dimensions: 4.5 in W × 9.5 in H × 4.0 in D
  
• Weight: 8.929 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The FXD63B125L meets UL 489 and IEC 60947-2 standards for molded case circuit breakers and is RoHS compliant. It's intended for use in compatible Siemens Sentron low-voltage distribution equipment and is built to provide long service life under normal operating conditions.

Where It Works Best

• Siemens Sentron FD-frame panelboards and switchboards
• Commercial and industrial electrical distribution systems
• Three-phase feeder and branch circuit protection
• Distribution equipment and motor circuit applications
• Replacement of existing Siemens FD-frame molded case circuit breakers
• Electrical maintenance and repair projects
• Facilities operating on systems up to 600VAC
• Installations requiring a 125 Amp, 3-pole thermal magnetic circuit breaker with factory-installed lugs