LD3300 - 300Amp Circuit Breaker

LD3300 - 300Amp Circuit Breaker

The LD3300 is a 300-amp, 3-pole Type LD thermal-magnetic circuit breaker built around a straightforward set of replacement specifications. If you're matching an LD3300 to equipment that's already in service, those electrical ratings are only part of the check. It's a solid fit for compatible existing and legacy equipment that specifically calls for this Type LD arrangement. Properly selected, installed, and used within its stated ratings, the LD3300 is built to last in the application it was designed for.

Key Features and Benefits

• 300A, 3-pole configuration for equipment requiring these ratings
• Type LD thermal-magnetic circuit breaker
• Interchangeable trip unit
• 40°C rated
• HACR rated
• Load terminals included
• Defined dimensions make it easier to check physical compatibility before installation
  

Technical Specifications

• Part Number: LD3300
  
• Type: LD
  
• Breaker Type: Thermal-Magnetic
  
• Amperage: 300A
  
• Poles: 3
  
• Trip Unit: Interchangeable
  
• AIC Rating at 600VAC: 25kA
  
• AIC Rating at 480VAC: 35kA
  
• AIC Rating at 240VAC: 65kA
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Load Terminals: Included
  
• Dimensions: 8.25"W x 10.75"H x 4.06"D
  
• Approximate Ship Weight: 24 lbs.
  

Material Compliance and Certifications

The available specifications identify the LD3300 as HACR-rated. No specific UL, CSA, IEC, RoHS, REACH, or other certification or material-compliance information was provided, so don't assume those details.

Where It Works Best

The LD3300 makes the most sense in existing or legacy electrical equipment that calls for a 300A, 3-pole Type LD breaker with an interchangeable trip unit.

When checking a replacement, work through the ratings that matter for the actual system. The LD3300 is rated 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC. Make sure the required interrupting capacity at your system voltage is appropriate for the installation.