HFD62B125 - 125Amp Circuit Breaker

HFD62B125 - 125Amp Circuit Breaker

When your existing electrical system calls for a Siemens HFD62B125, getting the details right matters. This is a 125-amp, 2-pole SENTRON molded case circuit breaker built on the Siemens FD frame and rated for applications 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. The breaker comes with TA1FD350A lugs on the load sides, giving installers flexibility with conductor sizes—6 AWG through 350 kcmil copper or 4 AWG through 350 kcmil aluminum.

Key Features and Benefits

• 125A, 2-pole configuration for equipment designed around these specific electrical requirements.
• Rated for systems up to 600VAC.
• Thermal-magnetic trip unit provides overload and short-circuit protection.
• Built on the Siemens FD frame for compatibility with equipment designed for this breaker configuration.
• Includes TA1FD350A load-side lugs.
• Accepts 6 AWG–350 kcmil copper and 4 AWG–350 kcmil aluminum conductors.

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number / MFN: HFD62B125
  
• Article Number: US2\:HFD62B125
  
• Product Type: Molded Case Circuit Breaker
  
• Product Family: HFD6
  
• Series: SENTRON
  
• Frame: FD
  
• Amp Rating: 125A
  
• Number of Poles: 2
  
• Maximum Voltage: 600VAC
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Rating at 600V: 25 kAIC
  
• Interrupting Rating at 480V: 65 kAIC
  
• Temperature Configuration: Standard 40°C
  
• Lugs: TA1FD350A, Load Side
  
• Copper Conductor Range: 6 AWG–350 kcmil
  
• Aluminum Conductor Range: 4 AWG–350 kcmil
  
• Dimensions (W × H × D): 4.5" × 9.5" × 4"
  
• Net Weight: 10.56 lb
  
• UPC: 783643211704
  
• Country of Origin: Mexico
  
• Applicable Standards: UL 489 / IEC 60947-2
  

Material Compliance and Certifications

The HFD62B125 meets UL 489 and IEC 60947-2, two standards applicable to circuit breakers and related electrical protection equipment.

Where It Works Best

The HFD62B125 makes the most sense in commercial and industrial electrical equipment specifically designed for a 125A, 2-pole Siemens FD-frame breaker. It's especially relevant when maintaining existing or legacy systems where changing the breaker's physical configuration or electrical characteristics isn't the goal. Instead, you're looking to preserve the required form, fit, and function of the original application.