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Eaton LD3300Y - Molded Case Circuit Breaker 300A 600V 3-Pole

Cutler Hammer
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The Eaton Cutler-Hammer LD3300Y is a three-pole molded case circuit breaker from the Series C family, designed to provide overcurrent protection through long-time and instantaneous (LI) trip functions. It is rated for 600V AC, 300A continuous current, and a 35kA interrupting capacity at 480V, operating on a three-phase system with a bolt-on connection. This L Frame unit features thermal-magnetic protection, weighs 20 lb, and is constructed for robust industrial environments. It complies with applicable UL and NEMA standards for molded case circuit breakers. Typical applications include protecting feeders, motors, and distribution panels in commercial and industrial power systems.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Dimensions: L Frame
  • Standards: UL, NEMA
  • Applications: Industrial power distribution, feeder protection
  • Switch Type: Circuit Breaker
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: Standard
  • Shipping Dimensions: Standard L Frame
  • Phase: 3
  • Voltage: 600V
  • Amperage: 300A
  • AIC rating: 35kA@480V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: L Frame
  • Trip Type: Thermal Magnetic
  • Panel Type: Standard
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Not applicable
  • Panel Style: Standard
  • Bus Type: Not applicable
  • Fuse Class: Not applicable
  • Insulation Temperature: Standard
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Bolt-On
  • Hz: 50/60
  • Coil Material: Not applicable
  • Horse Power: Not applicable
  • Aux Contacts: Not applicable
  • CPT: Not applicable
  • Full Load Amps: 300A
  • Dist Voltage: 600V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 300A
  • Full Load Amp Minimum: Not applicable
  • Enclosure: Not applicable
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not applicable
  • Amperage Maximum: 300A
  • Amperage Minimum: Not applicable
  • Nema Rating: Standard
  • Switch Style: Not applicable
  • Wire Size: Not applicable
  • Certification: UL
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Bolt-On
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL, NEMA
  • Compatible Frames: L Frame
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: L Frame
  • Current Rating: 300A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: Standard
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not available
  • GTIN: Not available