JJ3B350 - 350Amp Circuit Breaker

JJ3B350 - 350Amp Circuit Breaker

At 350 amps, the JJ3B350 sits within a 400 Ampere "JJ" Frame, but amperage is only one piece of the replacement puzzle. This is a three-pole, JJ3-frame molded case circuit breaker, identified as Type ET and rated at 40°C. Put those numbers alongside the nameplate information from the breaker you're replacing. If the frame, pole count, amperage, dimensions, and electrical ratings agree with the existing equipment requirements, you have the information needed to evaluate form, fit, and function. The JJ3B350 is built to last and is intended for compatible existing and legacy electrical systems.

Key Features and Benefits

• 350A rating with three poles for applications calling for this exact electrical arrangement.
• The JJ3 frame provides a specific reference when identifying a replacement.
• Type ET, 400 Ampere "JJ" Frame identification adds another useful compatibility checkpoint.
• Rated at 40 °C according to the available specifications.
  

Technical Specifications

• Part Number: JJ3B350
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: JJ3
  
• Type: ET
  
• Frame Identification: 400 Ampere "JJ" Frame
  
• Amperage: 350A
  
• Poles: 3
  
• AIC at 240VAC: 42 kA
  
• AIC at 480VAC: 30 kA
  
• AIC at 600VAC: 22 kA
  
• Temperature Rating: 40°C
  
• Width: 9.00 in.
  
• Height / Length: 11.00 in.
  
• Depth: 4.00 in.
  
• Dimensions: 9.00 in. W × 11.00 in. L × 4.00 in. D
  
• Approximate Ship Weight: 22.00 lb.
  

Material Compliance and Certifications

The available specifications do not list UL, CSA, IEC, RoHS, REACH, or other certification or material-compliance information for the JJ3B350. Rather than assuming approval based on the breaker type or frame designation, verify any required certification from the product labeling or applicable technical documentation.

Where It Works Best

The JJ3B350 is suited to compatible existing and legacy electrical equipment that requires a 350A, three-pole JJ3-frame molded-case circuit breaker. It's especially relevant when you're trying to keep existing equipment in service and need a replacement that corresponds to the original physical and electrical requirements.