HED43B125 - 125Amp Circuit Breaker

HED43B125 - 125Amp Circuit Breaker

The Siemens HED43B125 is a 125 Amp, 3-pole molded case circuit breaker built for low-voltage electrical distribution systems that require dependable circuit protection. Part of Siemens' SENTRON ED-frame family, it uses a thermal-magnetic trip unit to help protect your equipment from overloads and short circuits while maintaining the electrical ratings required for compatible installations. With a 42kA interrupting rating at 480 VAC, this breaker is commonly found in commercial and industrial power distribution equipment where maintaining the original specifications is important.

Key Features and Benefits

• 125 Amp current rating
• Three-pole molded case circuit breaker
• Siemens SENTRON ED-frame design
• Thermal-magnetic trip unit helps protect against overloads and short circuits
• Rated for 480 VAC systems
• Factory-installed load-side lugs (TA1E6125)
• Accepts copper and aluminum conductors
• Standard 40°C calibration
• UL 489 Listed and IEC 60947-2 compliant
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HED43B125
  
• Product Type: Molded Case Circuit Breaker
  
• Product Family: SENTRON HED4 (ED Frame)
  
• Current Rating: 125 Amps
  
• Poles: 3
  
• Voltage Rating: 480 VAC
  
• Interrupting Rating: 42kAIC @ 480 VAC
  
• Trip Unit: Thermal-Magnetic
  
• Frame: ED
  
• Calibration: 40°C
  
• Terminal Type: Load Lugs (TA1E6125)
  
• Copper Wire Range: 3 AWG to 3/0 AWG
  
• Aluminum Wire Range: 1 AWG to 2/0 AWG
  
• Dimensions: 3.00" W × 6.35" H × 3.92" D
  
• Weight: 0.34 lb.
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Listed
• IEC 60947-2 Compliant
• RoHS Compliant
• REACH Article 33 Information Available
• Export Classification: EAR99
  

Where It Works Best

The Siemens HED43B125 is used in commercial, industrial, and institutional electrical systems that require a 125 Amp, 3-pole, 480V molded case circuit breaker with a 42kA interrupting rating. It is designed for use in compatible Siemens panelboards, switchboards, and other distribution equipment where matching the original electrical ratings and ED-frame dimensions is essential.