LDB3300W - 300Amp Circuit Breaker

LDB3300W - 300Amp Circuit Breaker

The LDB3300W is a 300A, 3-pole molded-case circuit breaker for equipment requiring a Type LDB, L-Frame configuration. It has a thermal-magnetic, non-interchangeable trip unit and is HACR rated. If you're replacing a breaker in existing or legacy equipment, match the LDB3300W against the original breaker and equipment requirements for frame type, amperage, poles, voltage, interrupting capacity, trip configuration, dimensions, and connections. Properly selected, installed, and used within its specified ratings and intended application, this breaker is built to last.

Key Features and Benefits

• 300A, 3-pole configuration for equipment requiring these specific ratings
• Type LDB, L-Frame construction
• Thermal-magnetic trip unit with a non-interchangeable design
• Published dimensions make it easier to compare physical fit with an existing breaker
• Lug terminals are not included so that connection hardware can be matched to the application
• Suitable for form, fit, and functional replacement when all required specifications agree with the existing equipment
  

Technical Specifications

• Part Number: LDB3300W
  
• Product Type: Molded Case Circuit Breaker
  
• Type: LDB
  
• Frame: L-Frame
  
• Amperage: 300A
  
• Poles: 3
  
• Trip Type: Thermal-magnetic
  
• Trip Unit: Non-interchangeable
  
• AIC Rating at 600VAC: 25kA
  
• AIC Rating at 480VAC: 35kA
  
• AIC Rating at 240VAC: 65kA
  
• HACR Rated: Yes
  
• Lug Terminals: Not included
  
• Dimensions: 8.25"W x 10.75"H x 4.06"D
  
• Approximate Shipping Weight: 24.00 lb.
  

Material Compliance and Certifications

The information available for the LDB3300W identifies it as HACR-rated.

No specific UL, CSA, IEC, RoHS, REACH, or other certification or material-compliance details were provided for this part number. These should not be assumed. Where a particular certification or standard is required, confirm it from the markings on the actual breaker and the documentation for the equipment in which it will be installed.

Where It Works Best

The LDB3300W is best considered for existing or legacy equipment that specifically calls for a 300A, 3-pole Type LDB L-Frame molded case circuit breaker with a non-interchangeable thermal-magnetic trip unit.

Work through the ratings that matter for the application. At 600VAC, the breaker is rated 25kA AIC; at 480VAC, it's 35kA AIC; and at 240VAC, it's 65kA AIC. The required interrupting capacity must match the electrical system where the breaker will be used.