JL3B250 - 250Amp Circuit Breaker

JL3B250 - 250Amp Circuit Breaker

The JL3B250 has a few numbers that are worth checking closely when you're trying to match an existing breaker. It is identified as 40°C rated and Type ET, 400 Ampere "JL" Frame; the breaker itself carries a 250A current rating. The JL3B250 is built to last, and its published frame information, dimensions, pole count, and electrical ratings provide solid details for comparison with the breaker already in service. For legacy equipment, that makes it easier to check form, fit, and function without relying on assumptions.

Key Features and Benefits

• 250A current rating with a three-pole configuration.
• JL3 frame provides an important reference when checking compatibility.
• 40°C rated according to the supplied product information.
• Identified as a Type ET, 400 Ampere "JL" frame molded-case circuit breaker.
• Clearly defined ratings make it easier to compare the JL3B250 with existing or legacy equipment.
  

Technical Specifications

• Part Number: JL3B250
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: JL3
  
• Amperage: 250A
  
• Poles: 3
  
• AIC at 240VAC: 42 kA
  
• AIC at 480VAC: 30 kA
  
• AIC at 600VAC: 22 kA
  
• Temperature Rating: 40°C
  
• Additional Identification: Type ET, 400 Ampere "JL" Frame
  
• Width: 9.00 in.
  
• Height / Length: 11.00 in.
  
• Depth: 4.00 in.
  
• Overall Dimensions: 9.00 in. W × 11.00 in. L × 4.00 in. D
  
• Approximate Ship Weight: 22.00 lb.
  

Material Compliance and Certifications

No specific UL, CSA, IEC, RoHS, REACH, or other certification or material-compliance information was provided for the JL3B250. These certifications should not be assumed. Where a particular approval is required, verify it against the breaker labeling and applicable equipment documentation.

Where It Works Best

The JL3B250 is intended for compatibility checks involving existing or legacy electrical equipment that requires a 250A, three-pole JL3 molded-case circuit breaker with matching physical and electrical characteristics. The three voltage-specific AIC ratings are especially important because the required interrupting capacity must correspond to the system in which the breaker will be installed.

Before installation, compare the JL3 frame, 250A rating, three-pole arrangement, dimensions, system voltage, and required AIC rating with the equipment already in place. Those details provide a practical basis for confirming form, fit, and functional compatibility.