HFD63B250 - 250Amp Circuit Breaker

HFD63B250 - 250Amp Circuit Breaker

When you’re replacing a circuit breaker in existing electrical equipment, the details matter. The Siemens HFD63B250 is a 250-amp, 3-pole molded case circuit breaker from the SENTRON HFD6 family, built on the FD frame and equipped with a thermal-magnetic trip unit. Its physical dimensions are 4.5 inches wide by 9.5 inches high by 4 inches deep, giving maintenance professionals useful information when checking form and fit against an existing installation. The breaker also meets UL 489 and IEC 60947-2 standards.

Key Features and Benefits

• 250A current rating: The HFD63B250 is rated at 250 amps for compatible electrical distribution applications.
• 3-pole configuration: Designed for systems and equipment requiring a three-pole molded case circuit breaker.
• Up to 600VAC: Rated for applications with operating voltages within its specified 600VAC maximum.
• Thermal-magnetic trip unit: Combines thermal and magnetic trip functions for overcurrent and short-circuit protection.
• FD frame: Part of the Siemens SENTRON HFD6 family, making the frame and product family easy to identify when checking compatibility.
• Load-side lugs included: Equipped with TA1FD350A load-side lugs for the specified copper and aluminum conductor ranges.
• Broad conductor range: Accepts 6 AWG–350 kcmil copper or 4 AWG–350 kcmil aluminum conductors.

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number / MFN: HFD63B250
  
• Product Family: HFD6
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: FD
  
• Trip Unit: Thermal-Magnetic
  
• Rated Current: 250A
  
• Number of Poles: 3
  
• Maximum Voltage Rating: 600VAC
  
• Interrupting Capacity at 600V: 25 kAIC
  
• Interrupting Capacity at 480V: 65 kAIC
  
• Standard Temperature Rating: 40°C
  
• Load-Side Lugs: TA1FD350A
  
• Copper Wire Range: 6 AWG–350 kcmil
  
• Aluminum Wire Range: 4 AWG–350 kcmil
  
• Dimensions (W × H × D):
  • 4.5 × 9.5 × 4 in.
• Net Weight: 7.76 lb
  
• UPC: 783643211865
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

Electrical equipment selection isn't only about matching amperage and voltage. Standards, material compliance, and the intended application also deserve attention. The Siemens HFD63B250 molded case circuit breaker meets UL 489 and IEC 60947-2 standards.

Where It Works Best

The Siemens HFD63B250 250A 3-pole circuit breaker is best suited for compatible electrical distribution equipment that calls for an FD-frame, HFD6-family molded case circuit breaker with a 250A rating and operating voltage up to 600VAC. It can be particularly relevant in maintenance, repair, and form-fit-functional replacement applications, including existing and legacy electrical systems where retaining the specified breaker characteristics is essential.