JA3125W - 125Amp Circuit Breaker

JA3125W - 125Amp Circuit Breaker

When you're matching a breaker for existing equipment, small configuration details can make a big difference. The JA3125W is a 125-amp, 3-pole Type JA circuit breaker with a thermal-magnetic, non-interchangeable trip unit. For compatible legacy equipment that requires these electrical and physical characteristics, the JA3125W provides a clearly specified form, fit, and function replacement option. These products are built to last, but proper selection still depends on matching the complete breaker specifications to the equipment requirements.

Key Features and Benefits

• 125-amp rating: Provides a straightforward specification to compare with the breaker being replaced and the equipment requirements.
• Three-pole configuration: Designed for equipment specifically requiring a 3-pole breaker arrangement.
• Type JA: Helps narrow the replacement search when existing documentation or breaker markings specify Type JA.
• Thermal-magnetic trip: Uses the specified thermal-magnetic circuit breaker design.
• Non-interchangeable trip unit: An important configuration detail to confirm when matching an existing breaker.
• No terminals included: The JA3125W is supplied without terminals, making terminal requirements an essential part of the compatibility check.
  

Technical Specifications

• Part Number: JA3125W
  
• Product Type: Circuit Breaker
  
• Type: JA
  
• Amperage: 125 A
  
• Poles: 3
  
• A.I.C. Rating at 600VAC: 22k
  
• A.I.C. Rating at 480VAC: 22k
  
• A.I.C. Rating 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
  
• Terminals: Not 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

No specific UL, CSA, IEC, RoHS, REACH, or other certification or material compliance information was provided for the JA3125W. Those certifications should not be assumed from the breaker type or electrical ratings. Where a particular certification or compliance requirement applies, verify it against the product markings and applicable manufacturer documentation.

Where It Works Best

The JA3125W makes sense for compatible existing and legacy electrical equipment that specifically requires a 125A, 3-pole Type JA thermal-magnetic circuit breaker with a non-interchangeable trip unit and matching voltage-dependent interrupting ratings. Because terminals are not included, that detail should be checked carefully against the installation requirements rather than assuming this configuration is interchangeable with a terminal-equipped version.