JL3B400 - 400Amp Circuit Breaker

JL3B400 - 400Amp Circuit Breaker

The JL3B400 is easy to narrow down once you get past the part number and look at the actual ratings. It is a 400A, three-pole molded-case circuit breaker built on the JL3 frame, with additional identification as Type ET, 400 Ampere "JL" Frame. The JL3B400 is built to last, and its well-defined frame, amperage, dimensions, and electrical ratings make it easier to determine whether it has the right form, fit, and function for compatible legacy equipment.

Key Features and Benefits

• 400A rating for installations requiring this specific current rating.
• Three poles provide a clear reference point when checking an existing breaker.
• Uses the JL3 frame.
• Carries a 40°C rating.
• Additional identification is Type ET, 400 Ampere "JL" Frame.
• Classified as a molded case circuit breaker.
  

Technical Specifications

• Part Number: JL3B400
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: JL3
  
• Amperage: 400A
  
• Poles: 3
  
• AIC at 240VAC: 42 kA
  
• AIC at 480VAC: 30 kA
  
• AIC at 600VAC: 22 kA
  
• Temperature Rating: 40°C
  
• Type 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 included in the supplied specifications for the JL3B400. Those approvals should not be assumed. If a particular certification or listing is required for the installation, confirm it from the product markings and applicable equipment documentation.

Where It Works Best

The JL3B400 is intended for compatible existing and legacy electrical equipment that requires a 400A, three-pole JL3 molded case circuit breaker with the corresponding physical size and interrupting ratings. The Type ET, 400 Ampere "JL" Frame identification is another detail to compare with the breaker being replaced.