ED43B125L - 125Amp Circuit Breaker

ED43B125L - 125Amp Circuit Breaker

The Siemens ED43B125L is a 125 Amp, 3-pole molded case circuit breaker designed for use in compatible Siemens SENTRON ED-frame electrical distribution systems. When it's time to replace an existing ED-frame breaker, matching the original amperage, frame type, and interrupting rating helps keep the electrical system configured as intended without requiring modifications to the panel or switchboard.

You'll commonly find the ED43B125L protecting 480VAC three-phase circuits in commercial buildings, manufacturing facilities, warehouses, and institutional applications. Its three-pole design allows all phases to disconnect simultaneously, making it well suited for feeder circuits, motor loads, distribution equipment, and other applications where coordinated three-phase protection is required.

Key Features and Benefits

• 125 Amp molded case circuit breaker for compatible Siemens SENTRON ED-frame systems
• Three-pole design for protecting 480VAC three-phase electrical circuits
• Thermal magnetic trip unit provides protection against overloads and short circuits
• 18kA interrupting capacity at 480VAC
• Factory-installed line and load side lugs (TA1E6125) for straightforward field wiring
• Accepts compatible copper and aluminum conductors
• Designed as a form, fit, and function replacement for existing Siemens ED-frame installations
• Commonly used in commercial, industrial, and institutional electrical distribution systems
• Built to last for long-term service in demanding electrical environments
• Manufactured to meet recognized North American and international safety standards
  

Technical Specifications

• Catalog Number: ED43B125L
  
• Manufacturer: Siemens
  
• Product Family: SENTRON ED Frame
  
• Product Type: Molded Case Circuit Breaker
  
• Trip Unit: Thermal Magnetic
  
• Amperage Rating: 125 Amps
  
• Voltage Rating: 480VAC
  
• Poles: 3
  
• Interrupting Rating: 18kAIC at 480VAC
  
• Frame Type: ED
  
• Terminal Type: Line and Load Side Lugs (TA1E6125)
  
• Wire Range: 3–3/0 AWG Copper; 1–2/0 AWG Aluminum
  
• Dimensions:
  • Width: 3 in.
  • Length: 6.35 in.
  • Depth: 3.92 in.
• Net Weight: 3.915 lb.
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens ED43B125L is manufactured to comply with UL 489 and IEC 60947-2 standards for molded case circuit breakers. It is also RoHS compliant and meets applicable REACH substance reporting requirements. Designed for installation in compatible Siemens electrical distribution equipment, this breaker should be installed and serviced by qualified electrical personnel in accordance with all applicable electrical codes and manufacturer recommendations.

Where It Works Best

• Compatible Siemens SENTRON ED-frame panelboards and switchboards
• Commercial office buildings
• Manufacturing and industrial facilities
• Warehouses and distribution centers
• Institutional and educational facilities
• 480VAC three-phase feeder circuits
• Motor and equipment branch circuits
• Maintenance and replacement of existing ED-frame circuit breakers
• Applications requiring the same form, fit, and electrical ratings as the original breaker