FD63B225L - 225Amp Circuit Breaker

FD63B225L - 225Amp Circuit Breaker

The Siemens FD63B225L is a 225 Amp, 3-pole molded case circuit breaker designed for dependable protection in FD-frame electrical distribution systems. Built with a thermal-magnetic trip unit, this breaker provides reliable overload and short-circuit protection for your compatible electrical equipment while helping maintain safe and efficient power distribution. With its factory-installed assembly lugs, high interrupting capacity, and support for a wide range of conductor sizes, the FD63B225L is a practical choice for commercial and industrial applications where consistent circuit protection matters.

Key Features and Benefits

• Siemens FD-frame molded case circuit breaker
• Catalog Number: FD63B225L
• 225 Amp current rating
• 3-pole design for three-phase electrical distribution systems
• Thermal-magnetic trip unit for overload and short-circuit protection
• Includes factory-installed assembly lugs
• Rated for 600 VAC applications
• Interrupting capacity:
  • 22 kAIC at 600 VAC
  • 35 kAIC at 480 VAC
• Standard 40°C breaker rating
• Wide conductor compatibility:
  • Copper conductors: 6 AWG to 350 kcmil
  • Aluminum conductors: 4 AWG to 350 kcmil
• Designed for Siemens FD-frame applications requiring higher ampacity protection
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: FD63B225L
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: FD
  
• Amperage Rating: 225 Amps
  
• Number of Poles: 3
  
• Trip Unit Type: Thermal-Magnetic
  
• Voltage Rating: 600 VAC
  
• Interrupting Rating:
  • 22 kAIC at 600 VAC
  • 35 kAIC at 480 VAC
• Terminal Configuration: Line and Load Side Assembly Lugs
  
• Wire Range:
  • Copper: 6 AWG – 350 kcmil
  • Aluminum: 4 AWG – 350 kcmil
• Dimensions: 4.5 in. W × 9.5 in. H × 4 in. D
  
• Net Weight: 10.031 lb
  
• UPC: 783643005341
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens FD63B225L is manufactured as part of the Siemens FD-frame molded case circuit breaker family and is designed to meet recognized industry requirements, including:

• UL 489 – Standard for molded case circuit breakers and circuit breaker enclosures
• IEC 60947-2 – Low-voltage switchgear and controlgear circuit breaker standard

The breaker is intended for use in properly designed electrical systems where application requirements such as voltage, interrupting capacity, conductor sizing, and installation conditions are verified before installation.

Where It Works Best

The Siemens FD63B225L 225 Amp circuit breaker works best in commercial, industrial, and electrical distribution applications that require a three-pole FD-frame breaker with higher current capacity and dependable protection characteristics. It is well suited for compatible distribution equipment, electrical panels, and systems where protecting connected loads from overloads and fault conditions is a priority.