JA3125 - 125Amp Circuit Breaker

JA3125 - 125Amp Circuit Breaker

Replacing an existing breaker? The JA3125 provides a clear set of specifications for comparison with the unit you're replacing. It's a 125-amp, 3-pole Type JA circuit breaker with a thermal-magnetic, non-interchangeable trip unit and a 40°C rating. This is the kind of breaker where matching the details matters—amperage, poles, Type JA configuration, voltage, AIC rating, trip arrangement, terminals, and dimensions should all line up with the equipment requirements. For compatible legacy equipment that calls for these specifications, the JA3125 is a practical form, fit, and function replacement. It's built to last, with proper application depending on an accurate equipment match.

Key Features and Benefits

• 125-amp rating: Clearly defined for equipment requiring a 125A breaker.
• 3-pole configuration: Matches applications specifically designed around a three-pole breaker arrangement.
• Type JA: Gives buyers and maintenance personnel an important reference when checking an existing breaker or equipment documentation.
• Thermal-magnetic operation: Uses the specified thermal-magnetic trip design.
• Non-interchangeable trip unit: An important configuration detail when identifying a correct replacement.
• Load-side terminals included: No guesswork about whether this particular JA3125 configuration includes the load-side terminals.
  

Technical Specifications

• Part Number: JA3125
  
• Product Type: Circuit Breaker
  
• Type: JA
  
• Amperage: 125 A
  
• Poles: 3
  
• A.I.C. at 600VAC: 22k
  
• A.I.C. at 480VAC: 22k
  
• A.I.C. at 240VAC: 25k
  
• Interrupting Capacity at 600VAC: 22,000 A
  
• Interrupting Capacity at 480VAC: 22,000 A
  
• Interrupting Capacity at 240VAC: 25,000 A
  
• Trip Type: Thermal-Magnetic
  
• Trip Unit: Non-Interchangeable
  
• Temperature Rating: 40°C
  
• Load-Side Terminals: Included
  
• Width: 5.50 in.
  
• Height / Length: 10.13 in.
  
• Depth: 3.94 in.
  
• Overall Dimensions: 5.50"W x 10.13"L x 3.94"D
  
• Approximate Ship Weight: 16.00 lb.
  

Material Compliance and Certifications

The supplied specifications do not include UL, CSA, IEC, RoHS, REACH, or other certification or material compliance information for the JA3125. Rather than making assumptions, any certification or compliance requirement should be checked against the breaker markings and applicable manufacturer documentation.

Where It Works Best

The JA3125 is appropriate for compatible existing and legacy equipment that calls for a 125A, 3-pole Type JA circuit breaker with a thermal-magnetic, non-interchangeable trip unit. It is particularly important to note that this configuration includes load-side terminals.