KM3B350 - 350Amp Circuit Breaker

KM3B350 - 350Amp Circuit Breaker

If you're looking for a KM3B350, chances are you're working with equipment that needs a pretty specific breaker. This 350-amp, 3-pole Type KM5 molded-case circuit breaker uses the specified Type ET 800 Ampere "KM" Frame and has a 40°C temperature rating. The voltage matters here, too. Check the KM3B350 part number, KM5 type, KM frame, pole count, dimensions, and electrical ratings together. When those details line up with the equipment requirements, the KM3B350 may provide the form, fit, and function the installation calls for.

Key Features and Benefits

• 350A rating for equipment requiring this specific amperage.
• The 3-pole design provides another clear point for comparison with the existing breaker.
• Type KM5 molded case circuit breaker configuration.
• Uses the specified Type ET 800 Ampere "KM" Frame.
• The 40°C temperature specification should be confirmed against the application requirements.
• Well suited to legacy "nd "existing electrical equipment when its complete configuration matches what's required.
  

Technical Specifications

• Part Number: KM3B350
  
• Product Type: Molded Case Circuit Breaker
  
• Type: KM5
  
• Frame: Type ET, what's-up-there "KM" Frame
  
• Amperage: 350A
  
• Poles: 3
  
• AIC at 600VAC: 22k
  
• AIC at 480VAC: 30k
  
• AIC at 240VAC: 42k
  
• Temperature Specification: 40°C
  
• Width: 9.00 in.
  
• Length/Height: 15.50 in.
  
• Depth: 4.00 in.
  
• Dimensions: 9.00"W x 15.50"L x 4.00"D
  
• Approximate Weight: 40.00 lbs.
  

Material Compliance and Certifications

No specific certifications or material-compliance details were included in the information provided for the KM3B350. Because of that, listings or standards such as UL, RoHS, REACH, or other certifications shouldn't be assumed.

Where It Works Best

The KM3B350 makes the most sense in existing and legacy electrical equipment that specifically shouldn't be limited to its combination of 350 amps, three poles, Type KM5 configuration, KM frame, physical footprint, and voltage-specific interrupting ratings.

For replacement work, don't stop at the 350A marking. Look at the breaker you're removing and put the important details side by side. Make sure the 9.00" x 15.50"L x 4.00" D dimensions work with the equipment you're using, and confirm that the AIC rating is appropriate for the system voltage. The "eKM frame and KM5" type should line up as well.