LDB3300 - 300Amp Circuit Breaker

LDB3300 - 300Amp Circuit Breaker

The LDB3300 is a 300-amp, 3-pole molded case circuit breaker supplied as a complete Series C L-frame breaker. It’s a solid choice for servicing your existing equipment that requires this exact breaker type and rating. When those specifications match the application, it can serve as a form, fit, and functional replacement. Properly selected, installed, and used within its specified ratings, the LDB3300 is built to last in its intended application.

Key Features and Benefits

• 300A rating with a 3-pole configuration
• Series C, L-frame molded case circuit breaker
• Supplied as a complete breaker
• T186 trip type
• Rated for 50–60 Hz
• Includes line and load terminals
• Aluminum terminal material
• Known dimensions help with checking physical compatibility
  

Technical Specifications

• Catalog Number: LDB3300
  
• Product Type: Molded Case Circuit Breaker
  
• Circuit Breaker Type: LDB
  
• Series: Series C
  
• Frame: L
  
• Configuration: Complete Breaker
  
• Amperage: 300A
  
• Poles: 3
  
• Trip Type: T186
  
• Frequency: 50–60 Hz
  
• Interrupt Rating: 35 kAIC at 480VAC
  
• Interrupt Rating: 65 kAIC at 240VAC
  
• Terminals: Line and Load
  
• Terminal Material: Aluminum
  
• Dimensions: 8.25"H x 8.25"W x 4.06"D
  
• Weight: 20 lb
  

Material Compliance and Certifications

The LDB3300 is UL 489 certified. Its specified terminal material is aluminum.

Where It Works Best

The LDB3300 is best considered for maintenance and replacement work in existing or legacy electrical equipment that requires a 300A, 3-pole LDB Series C breaker in an L-frame configuration.

A replacement check should cover more than the 300A rating. Confirm the T186 trip type, number of poles, frequency, and required interrupting capacity. At 480VAC, the published interrupt rating is 35 kAIC; at 240VAC, it is 65 kAIC.