HFD63B070 - 70Amp Circuit Breaker

HFD63B070 - 70Amp Circuit Breaker

The Siemens HFD63B070 is a 70-amp, 3-pole molded case circuit breaker made for compatible SENTRON equipment using the FD frame. For replacement work, the details are what count. This breaker is rated up to 600VAC, uses a thermal-magnetic trip unit, and has an interrupting rating of 25 kAIC at 600V and 65 kAIC at 480V. If you're replacing an existing HFD63B070, matching the catalog number is a good starting point, but you should also check the frame, amperage, poles, voltage, interrupting capacity, lugs, and dimensions. The HFD63B070 meets UL 489 and IEC 60947-2 standards and is built to last when installed correctly and used within its specified ratings.

Key Features and Benefits

• 70A rating with three poles for equipment designed around this specific breaker configuration.
• FD frame construction makes physical compatibility easier to verify in matching SENTRON equipment.
• Handles applications rated up to 600VAC.
• Uses a straightforward thermal-magnetic trip mechanism for overload and short-circuit protection.
• TA1FD350A lugs are included on the load sides, an important point when matching an existing installation.
• Works with a wide conductor range: 6 AWG–350 kcmil copper and 4 AWG–350 kcmil aluminum.
• Built around a standard 40°C breaker configuration.
• Meets UL 489 and IEC 60947-2 requirements.

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HFD63B070
  
• Article Number: US2\:HFD63B070
  
• Series: SENTRON
  
• Product Family: HFD6
  
• Breaker Type: Molded Case Circuit Breaker
  
• Frame: FD
  
• Amp Rating: 70A
  
• Poles: 3
  
• Maximum Voltage: 600VAC
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Capacity at 600V: 25 kAIC
  
• Interrupting Capacity at 480V: 65 kAIC
  
• Standard Temperature: 40°C
  
• Lugs: TA1FD350A
  
• Lug Location: Line and load sides
  
• 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 in.
  
• Net Weight: 9.414 lb
  
• UPC: 783643211766
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens HFD63B070 circuit breaker meets UL 489 and IEC 60947-2 standards. These are useful specifications to have on hand when confirming that a replacement breaker meets the requirements of the existing equipment or installation.

Where It Works Best

The HFD63B070 belongs in applications that specifically call for a 70A, 3-pole, 600VAC FD-frame circuit breaker with the corresponding interrupting ratings and lug arrangement. That commonly makes it relevant for maintenance and replacement work in compatible commercial and industrial electrical distribution equipment, including existing systems where preserving the original form, fit, and function is important.