HFD63B175 - 175Amp Circuit Breaker

HFD63B175 - 175Amp Circuit Breaker

When you’re matching a circuit breaker to an existing electrical system, the catalog number is only the beginning. The Siemens HFD63B175 is a 175-amp, 3-pole molded case circuit breaker in the SENTRON HFD6 family, built on the FD frame for systems rated up to 600VAC. It uses a thermal-magnetic trip unit for overload and short-circuit protection and carries an interrupting rating of 25 kAIC at 600V and 65 kAIC at 480V.

Key Features and Benefits

• 175A, 3-pole configuration: Designed for compatible three-phase electrical applications requiring a 175-amp breaker.
• FD-frame construction: Helps maintain the correct physical form and fit when working with equipment designed for a compatible Siemens FD-frame breaker.
• Up to 600VAC: Suitable for systems requiring the HFD63B175's specified voltage rating.
• Thermal-magnetic trip unit: Provides overload and short-circuit protection using a familiar molded case breaker design.
• Defined interrupting ratings: Rated 25 kAIC at 600V and 65 kAIC at 480V, making it easier to verify the breaker against system requirements.
• Load lugs included: Uses TA1FD350A lugs on one side of the breaker.
• Broad conductor range: Accepts 6 AWG–350 kcmil copper or 4 AWG–350 kcmil aluminum conductors.

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number / MFN: HFD63B175
  
• Article Number: US2:HFD63B175
  
• Product Family: HFD6
  
• Breaker Type: Molded Case Circuit Breaker
  
• Frame: FD
  
• Rated Current: 175A
  
• Number of Poles: 3
  
• Maximum Voltage: 600VAC
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Rating: 25 kAIC at 600V
  
• Interrupting Rating at 480V: 65 kAIC
  
• Standard Temperature Rating: 40°C
  
• Load-Side Lugs: TA1FD350A
  
• Copper Conductor Range: 6 AWG–350 kcmil
  
• Aluminum Conductor Range: 4 AWG–350 kcmil
  
• Dimensions:
  • 4.5 in. W × 9.5 in. H × 4 in. D
• Net Weight: 8.929 lb
  
• UPC: 783643211834
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens HFD63B175 circuit breaker meets UL 489 and IEC 60947-2 standards. REACH Article 33 information is provided by the manufacturer, while a SCIP number is not listed.

Where It Works Best

The HFD63B175 175A circuit breaker is best suited to commercial and industrial electrical equipment designed around a compatible Siemens SENTRON FD-frame molded case circuit breaker. It can be a practical choice for maintenance and replacement work where the existing installation calls for this particular combination of 175 amps, three poles, 600VAC capability, thermal-magnetic protection, and FD-frame dimensions.