Eaton Cutler Hammer LDB3300 300A 3-Pole Molded Case Circuit Breaker – Bolt-On Mount – 600V

The Eaton Cutler-Hammer LDB3300 molded case circuit breaker is engineered to provide dependable protection for industrial and commercial electrical distribution systems. Built on the LDB frame platform, this breaker features a thermal magnetic non-interchangeable trip unit designed to protect circuits from overloads and short-circuit conditions. Rated at 300 amperes with a 3-pole configuration, the breaker supports AC systems up to 600VAC and DC systems up to 250VDC. It is also suitable for reverse feed applications, providing installation flexibility in various power distribution setups. With high interrupting capacity and a secure bolt-on mounting design, the LDB3300 is well suited for switchboards, panelboards, and heavy-duty electrical systems.

Product Specification

• Brand: Eaton / Cutler-Hammer
• Model: LDB3300
• Amperage: 300 Ampere
• Number of Poles: 3 Pole
• Breaker Type: Molded Case Circuit Breaker (MCCB)
• Mount Type: Bolt-On
• Rated Voltage: Up to 600V AC / 250V DC
• Frame Type: LDB Frame
• Warranty: 1 Year

Technical Specification

• Trip Unit Type: Thermal Magnetic Non-Interchangeable Trip Unit
• Trip Setting Range: Adjustable 5–10 times continuous ampere rating
• Connection Type: Bolt-On
• Terminal Type: Aluminum line and load end terminals standard
• Temperature Rating: 300A at 40°C
• Reverse Feed Capability: Suitable for reverse feed installation
• Protection Type: Overload and Short Circuit Protection
• Application: Industrial and commercial power distribution systems

Voltage and Ratings

• Maximum Operating Voltage: 600 VAC / 250 VDC
• Rated Current: 300 Ampere
• Interrupting Ratings:
• • 65 kA @ 240 VAC
  • 35 kA @ 480 VAC
  • 25 kA @ 600 VAC
  • 22 kA @ 250 VDC
• Frequency Rating: 50/60 Hz for AC systems

Product Data

• Manufacturer: Eaton / Cutler Hammer
• Product Category: Molded Case Circuit Breaker
• Frame Series: LDB Frame
• Pole Configuration: 3 Pole
• Mounting Method: Bolt-On
• Terminal Type: Aluminum line and load end terminals standard
• Protection Mechanism: Thermal Magnetic
• Typical Applications: Industrial switchgear, commercial distribution panels, and heavy-duty electrical installations

Important Note

The product image shown may represent a base model and is intended for identification purposes only. Accessories purchased with your breaker can be installed according to your required configuration at no additional cost when instructions are provided during checkout. Installation should always be carried out by a qualified electrician, and compatibility with system voltage ratings and applicable electrical codes should be verified before operation.

Returns are easy

You may return items within 10 days of delivery for a refund.

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.