EH3B125 - 125Amp Circuit Breaker

EH3B125 - 125Amp Circuit Breaker

When maintaining an existing electrical distribution system, choosing the correct replacement breaker helps keep equipment operating as originally designed. The EH3B125 molded-case circuit breaker is a 3-pole, 125-amp breaker designed as a form, fit, and function replacement for equipment built to accept an EH3 circuit breaker. Whether you're replacing a breaker during routine maintenance or restoring service after an electrical fault, matching the original electrical ratings and physical dimensions helps ensure proper compatibility with your existing system.

Key Features and Benefits

• Designed as a form, fit, and functional replacement for compatible EH3 molded case circuit breakers
• 125 Amp current rating for overcurrent and short-circuit protection
• 3-pole configuration for three-phase electrical systems
  
• Rated for operation in ambient temperatures up to 40°C
• Molded case construction built to last in properly maintained electrical systems
• Helps maintain compatibility with equipment designed for an EH3 circuit breaker
• Suitable for maintenance, repair, and replacement applications where original electrical ratings must be maintained
  

Technical Specifications

• Part Number: EH3B125
  
• Type: EH3
  
• Product Type: Molded Case Circuit Breaker
  
• Poles: 3
  
• Current Rating: 125 Amps
  
• Interrupting Capacity: 14kA @ 480VAC; 65kA @ 240VAC
  
• Ambient Temperature Rating: 40°C
  
• Dimensions:
  • Width: 4.50 inches
  • Height: 6.00 inches
  • Depth: 3.63 inches
• Approximate Shipping Weight: 5.00 lbs.
  

Material Compliance and Certifications

• Molded case circuit breaker construction
• Manufactured to the published electrical ratings for this model
• Intended for installation in compatible electrical distribution equipment
• Installation should be performed in accordance with applicable electrical codes and manufacturer recommendations
• Always verify compatibility with your existing equipment before installation
  

Where It Works Best

The EH3B125 is well-suited for maintaining existing commercial and industrial electrical systems originally designed to use an EH3 molded-case circuit breaker. It is commonly used in panelboards, switchboards, motor control equipment, and other three-phase power distribution systems requiring a 125-amp, 3-pole breaker with the specified interrupting ratings. By matching the original form, fit, and functional characteristics, the EH3B125 helps preserve the intended operation of compatible legacy electrical equipment without requiring modifications to the existing installation.