HFD63B070L - 70Amp Circuit Breaker

HFD63B070L - 70Amp Circuit Breaker

When you're replacing a circuit breaker in existing equipment, getting the details right matters. The Siemens HFD63B070L is a 70A, 3-pole molded case circuit breaker from the SENTRON HFD6 family, designed for compatible FD-frame applications rated up to 600VAC. It uses a thermal-magnetic trip unit and is rated 25 kAIC at 600V and 65 kAIC at 480V.

Key Features and Benefits

• 70A, 3-pole design for compatible three-pole electrical applications.
• Rated up to 600VAC, with a 25 kAIC interrupting rating at 600V.
• Thermal-magnetic trip unit provides overload and short-circuit protection.
• TA1FD350A lugs are included on both the line and load sides, an important detail when matching an existing breaker.
• Handles a useful range of conductor sizes: 6 AWG–350 kcmil copper and 4 AWG–350 kcmil aluminum.
• FD-frame dimensions of 4.5 x 9.5 x 4 inches make physical fit easier to verify before installation.
• Meets UL 489 and IEC 60947-2 standards.

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HFD63B070L
  
• Article Number: US2\:HFD63B070L
  
• Product Family: HFD6
  
• Series: SENTRON
  
• Type: Molded Case Circuit Breaker
  
• Frame: FD
  
• Amperage: 70A
  
• Poles: 3
  
• Voltage Rating: 600VAC
  
• Trip Type: Thermal-Magnetic
  
• Interrupting Rating at 600V: 25 kAIC
  
• Interrupting Rating at 480V: 65 kAIC
  
• Standard Temperature: 40°C
  
• Lugs: TA1FD350A, line and load side
  
• Copper Conductor Range: 6 AWG–350 kcmil
  
• Aluminum Conductor Range: 4 AWG–350 kcmil
  
• Dimensions: 4.5" W x 9.5" H x 4" D
  
• Net Weight: 10.031 lb
  
• UPC: 783643235830
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The HFD63B070L meets UL 489 and IEC 60947-2 standards. These are particularly important specifications to confirm when the breaker is being used as a replacement in existing electrical equipment. Manufacturer documentation does not list RoHS substance-restriction compliance as available for this model. A SCIP number is also listed as unavailable, while information related to REACH Article 33 is provided separately by the manufacturer.

Where It Works Best

The Siemens HFD63B070L makes the most sense in commercial and industrial electrical equipment designed around an FD-frame, 70A, 3-pole molded case circuit breaker with the corresponding electrical and physical specifications. It's particularly relevant when maintaining existing equipment where matching the original breaker’s form, fit, and function is the priority.