FD63B150L - 150Amp Circuit Breaker

FD63B150L - 150Amp Circuit Breaker

The Siemens FD63B150L is a 150 Amp, 3-pole molded case circuit breaker featuring a thermal-magnetic trip unit and factory-installed line- and load-side lugs. Built for FD-frame applications, this breaker is designed for your electrical systems that require a matching breaker assembly with the correct frame style, amp rating, pole configuration, and connection arrangement.

Rated at 600 VAC, the FD63B150L provides 22 kAIC at 600V and 35 kAIC at 480V interrupting capacity for dependable circuit protection in compatible distribution equipment. The breaker supports a wide range of conductor sizes, including 6 AWG to 350 kcmil copper and 4 AWG to 350 kcmil aluminum wiring.

Key Features and Benefits

• Siemens FD-frame molded case circuit breaker
• Catalog Number: FD63B150L
• 150 Amp current rating
• Three-pole design for three-phase applications
• Thermal-magnetic trip unit for overload and short-circuit protection
• 600 VAC voltage rating
• Interrupting capacity:
  • 22 kAIC at 600 VAC
  • 35 kAIC at 480 VAC
• Factory-installed line and load side lugs
• Supports larger conductor sizes:
  • Copper: 6 AWG to 350 kcmil
  • Aluminum: 4 AWG to 350 kcmil
• Standard 40°C breaker rating
• Meets UL 489 and IEC 60947-2 standards
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: FD63B150L
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: FD
  
• Amp Rating: 150 Amps
  
• Number of Poles: 3
  
• Trip Unit Type: Thermal-Magnetic
  
• Voltage Rating: 600 VAC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating:
  • 22 kAIC at 600 VAC
  • 35 kAIC at 480 VAC
• Terminal Configuration: 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
  
• Weight: Approximately 10.031 lbs
  
• UPC: 783643005310
  

Material Compliance and Certifications

The Siemens FD63B150L is manufactured as part of the Siemens FD-frame molded case circuit breaker family and meets recognized industry standards, including UL 489 and IEC 60947-2. These certifications help confirm that the breaker has been evaluated for performance, construction, and safety requirements applicable to molded case circuit breakers.

Where It Works Best

The Siemens FD63B150L works well in commercial, industrial, and facility electrical distribution systems where an FD-frame breaker assembly is required. It is a practical choice for equipment requiring a 150 Amp, three-pole circuit breaker with factory-installed lugs, thermal-magnetic protection, and higher interrupting capacity.