FD63B250 - 250Amp Circuit Breaker

FD63B250 - 250Amp Circuit Breaker

When you need a 250 Amp circuit breaker for an FD-frame application, the Siemens FD63B250 delivers the specifications that matter most. This 3-pole molded case circuit breaker is built with a thermal-magnetic trip unit and includes line and load side lugs, making it a complete breaker assembly for compatible electrical distribution equipment.

The FD63B250 is rated for 600 VAC and provides 22 kAIC at 600V and 35 kAIC at 480V interrupting capacity. It is designed for systems that require reliable overload and short-circuit protection while supporting larger conductors. With a wire range of 6 AWG to 350 kcmil copper and 4 AWG to 350 kcmil aluminum, this Siemens FD-frame breaker offers flexibility for a variety of commercial and industrial electrical applications.

Key Features and Benefits

• Siemens FD-frame molded case circuit breaker
• 250 Amp rating for higher-capacity electrical distribution applications
• 3-pole design for three-phase systems
• Thermal-magnetic trip unit helps protect against:
  • Overloads
  • Short-circuit conditions
• 600 VAC voltage rating
• Factory-installed line and load side lugs
• Standard 40°C breaker rating
• Meets UL 489 and IEC 60947-2 standards
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: FD63B250
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: FD
  
• Amperage: 250 Amps
  
• Poles: 3
  
• Trip Unit: Thermal-Magnetic
  
• Voltage Rating: 600 VAC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating:
  • 22 kAIC at 600 VAC
  • 35 kAIC at 480 VAC
• Terminal Type: Line and Load Side 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
  
• UPC: 783643211513
  

Material Compliance and Certifications

The Siemens FD63B250 is manufactured for FD-frame molded case circuit breaker applications and meets UL 489 and IEC 60947-2 standards. These certifications help confirm that the breaker meets established requirements for molded case circuit breaker performance and construction.

Where It Works Best

The Siemens FD63B250 250 Amp circuit breaker is a strong choice for commercial buildings, industrial facilities, and electrical distribution systems using compatible FD-frame equipment. It is commonly selected for applications where a higher amperage three-pole breaker is needed without sacrificing important protection features.