K3125 - 125Amp Circuit Breaker

K3125 - 125Amp Circuit Breaker

When you're tracking down a K3125 circuit breaker, the part number is only the starting point. You'll also want the amperage, pole count, frame, trip design, and physical size to line up with the equipment already in place. The K3125 is built to last, but replacement work still comes down to one thing: getting the right form, fit, and function for the existing system. Check these specifications against the breaker being replaced to make sure everything lines up.

Key Features and Benefits

• 125A rating for installations specifically calling for this amperage.
• A three-pole design adds another important compatibility point to verify.
• Type K / K-Frame configuration helps narrow down the correct replacement for existing equipment.
• Thermal-magnetic trip design is well suited to applications requiring this configuration.
• Focused on form, fit, and functional replacement rather than unnecessary changes to an existing system.
  

Technical Specifications

• Part Number: K3125
  
• Product Type: Molded Case Circuit Breaker
  
• Type: K
  
• Frame: K-Frame
  
• Amperage: 125A
  
• Number of Poles: 3
  
• Trip Design: Thermal-Magnetic
  
• A.I.C. Rating & Volts: 600VAC
  
• Width: 8.25 in.
  
• Height / Length: 15.50 in.
  
• Depth: 4.00 in.
  
• Overall Dimensions: 8.25 in. W × 15.50 in. L × 4.00 in. D
  
• Approximate Ship Weight: 34.00 lb
  

Material Compliance and Certifications

No specific certifications or material compliance information was provided for the K3125. UL, CSA, IEC, RoHS, REACH, or other certifications should not be assumed. If your installation requires a specific approval or compliance standard, confirm this in the applicable product documentation before installation.

Where It Works Best

The K3125 is a practical choice for maintaining compatible existing or legacy electrical equipment that requires a 125A, three-pole Type K/K-Frame molded-case circuit breaker with a thermal-magnetic trip design. Its published dimensions also provide maintenance teams and electrical professionals with concrete measurements to verify when physical fit is a concern.

Before replacing an existing breaker, compare the K3125 part number, 125A rating, three-pole configuration, K-Frame designation, thermal-magnetic trip design, electrical specifications, and dimensions with the requirements of the installed equipment. That careful specification-by-specification check is the best way to confirm the correct form, fit, and function.