EH3B125 - 125Amp Circuit Breaker

EH3B125 - 125 Amp Circuit Breaker

When you’re working with an existing electrical system, the last thing you want is guesswork. The EH3B125 molded case circuit breaker is built to fit right into EH3 frame setups, making it a practical choice when you need to restore protection without changing your configuration. With a 125-amp rating and a 3-pole design, it supports balanced three-phase power while helping guard against overloads and short circuits. Its interrupting capacity—14k A.I.C. at 480VAC and 18k A.I.C. at 240VAC—aligns with the needs of many commercial and industrial applications still operating on established infrastructure. Designed for use in environments up to 40°C, this breaker reflects the kind of long-lasting construction electricians have relied on for years.

Key Features and Benefits

• 125 Amp capacity: for dependable circuit protection
• 3-pole configuration: for three-phase electrical systems
• Designed to fit EH3 frame installations: without modification
• Interrupting capacity rated at: 14k A.I.C. @ 480VAC and 18k A.I.C. @ 240VAC
• Molded case construction: built to last in demanding environments
• Suitable for operation in temperatures up to 40°C
• Helps maintain system continuity: in legacy equipment setups

Technical Specifications

• Part Number: EH3B125
  
• Amperage: 125A
  
• Poles: 3
  
• Frame Type: EH3
  
• Interrupting Capacity:
  • 14k A.I.C. @ 480VAC
  • 18k A.I.C. @ 240VAC
• Temperature Rating: 40°C
  
• Breaker Type: Molded Case Circuit Breaker
  
• Dimensions (Approx.): 6.0" height
  
• Weight: 4.5 lbs
  

Material Compliance and Certifications

• Industry Standards: The EH3B125 is manufactured in accordance with widely accepted industry standards for molded case circuit breakers.
• Usage Note: It is intended for use in systems that require adherence to established electrical safety practices. Always confirm compliance requirements based on your specific installation and local code regulations.
  

Where It Works Best

• This breaker is a solid fit for panelboards, switchboards, and distribution systems that already use EH3 frame components. You’ll often find it in commercial buildings, industrial facilities, and service environments where maintaining existing equipment is key. It’s especially useful when replacing a breaker to keep your system operating as designed—no retrofitting or redesign required.