HED42B125 - 125Amp Circuit Breaker

HED42B125 - 125Amp Circuit Breaker

The Siemens HED42B125 is a 125 Amp, 2-pole molded case circuit breaker designed for compatible Siemens ED frame electrical distribution applications. Built with a thermal magnetic trip unit, this breaker provides the specified protection characteristics required for systems using a matching ED frame configuration. With a 480V rating, 42kAIC interrupting capacity, and load lug connections, the HED42B125 is intended for replacement and maintenance applications where maintaining your original breaker specifications is important.

Key Features and Benefits

• 125 Amp, 2-pole molded case circuit breaker
• Siemens SENTRON ED frame design
• Thermal magnetic trip unit for circuit protection
• 480V voltage rating
• Load lug connection configuration
• Supports:
  • 3–3/0 AWG copper conductors
  • 1–2/0 AWG aluminum conductors

Technical Specifications

• Catalog Number: HED42B125
  
• Manufacturer: Siemens
  
• Product Type: Molded case circuit breaker
  
• Frame Type: ED Frame
  
• Amperage Rating: 125 Amps
  
• Voltage Rating: 480V
  
• Number of Poles: 2
  
• Trip Unit Type: Thermal magnetic
  
• Interrupting Rating: 42kAIC at 480V
  
• Terminal Configuration: Load lugs only
  
• Copper Wire Range: 3–3/0 AWG
  
• Aluminum Wire Range: 1–2/0 AWG
  
• Dimensions: 2 in W x 6.35 in H x 3.92 in D
  
• Net Weight: 2.8 lb
  
• UPC: 783643210080
  

Material Compliance and Certifications

The Siemens HED42B125 is designed to meet applicable UL 489 and IEC 60947-2 circuit breaker standards.

Where It Works Best

• Siemens ED frame electrical distribution equipment
• 480V two-pole circuit applications
• Commercial and industrial electrical systems
• Maintenance and replacement projects requiring a matching 125 Amp breaker