FD63B250L - 250Amp Circuit Breaker

FD63B250L - 250Amp Circuit Breaker

The FD63B250L Siemens circuit breaker is a 250 Amp, 3-pole molded case circuit breaker built for electrical systems that need dependable protection and reliable performance. As part of the Siemens SENTRON FD frame family, this breaker is designed for commercial and industrial applications where protecting equipment, feeders, and distribution systems from overloads and short circuits is critical.

When you need a 600V circuit breaker with higher amperage capacity, the FD63B250L provides a practical solution with its thermal magnetic trip unit, which responds to both long-term overload conditions and sudden short-circuit events.

Key Features and Benefits

• 250 Amp, 3-pole Siemens SENTRON molded case circuit breaker
• Designed for 600V commercial and industrial electrical systems
• Thermal magnetic trip protection helps guard against overloads and short circuits
• 22kAIC at 600V and 35kAIC at 480V interrupting capacity
• Includes factory-installed line and load side lugs
• TA1FD350A lugs support a wide range of copper and aluminum conductors
• Compatible with 6 AWG–350 kcmil copper and 4 AWG–350 kcmil aluminum wire
  

Technical Specifications

• Catalog Number: FD63B250L
  
• Manufacturer: Siemens
  
• Product Type: Molded Case Circuit Breaker (MCCB)
  
• Frame Size: FD6
  
• Amperage Rating: 250 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 600 VAC
  
• Interrupting Rating: 22 kAIC at 600V / 35 kAIC at 480V
  
• Trip Unit: Thermal Magnetic
  
• Temperature Rating: 40°C Standard
  
• Connection Type: Line and Load Side Lugs Included
  
• Lug Type: TA1FD350A
  
• Wire Range:
  • Copper: 6 AWG–350 kcmil
  • Aluminum: 4 AWG–350 kcmil
• Standards: UL 489 / IEC 60947-2
  
• Dimensions: 4.5 in W x 9.5 in H x 4 in D
  
• Weight: 10.031 lb
  
• UPC: 783643005358
  

Material Compliance and Certifications

The Siemens FD63B250L molded case circuit breaker is designed to meet recognized electrical safety and performance standards, including UL 489 and IEC 60947-2 requirements.

Where It Works Best

• Commercial buildings and electrical distribution systems
• Industrial facilities requiring 250 amp circuit protection
• Three-phase power distribution applications
• Equipment feeders and branch protection systems
• Siemens FD frame breaker replacement projects
• Electrical panels, switchboards, and distribution assemblies
• Applications requiring thermal magnetic overcurrent protection
• Systems using copper or aluminum conductors