Eaton Cutler Hammer HKDDC3300 300A 3-Pole Molded Case Circuit Breaker – Bolt-On Mount – 600VDC

The Eaton Cutler-Hammer HKDDC3300 is a high-performance K-frame molded case circuit breaker engineered for reliable protection in DC power distribution systems. Designed with a thermal-magnetic interchangeable trip unit, this breaker provides dependable overload and short-circuit protection while allowing flexible trip adjustment to suit varying load conditions. With a 300-ampere rating at 40°C and high interrupting capacity, the HKDDC3300 is suitable for demanding industrial and commercial DC applications such as battery systems, renewable energy installations, and DC power distribution panels. Its bolt-on mounting design ensures secure installation, while the standard terminal configuration simplifies wiring and system integration.

Product Specifications

• Brand: Eaton / Cutler-Hammer
• Model: HKDDC3300
• Breaker Type: Molded Case Circuit Breaker (MCCB)
• Frame Style: HKD (K-Frame)
• Rated Current: 300 Ampere
• Number of Poles: 3 Pole
• Trip Unit Type: Thermal Magnetic Interchangeable Trip Unit
• Mounting Type: Bolt-On Connection
• Standard Lug Type: With Terminals Standard
• Warranty: One Year Manufacturer Warranty

Technical Specifications

• Frame Type: K-Frame
• Trip Adjustment Range: Adjustable from 5× to 10× the continuous ampere rating
• Operating Temperature Reference: 40°C
• Circuit Protection: Overload and Short Circuit Protection
• Configuration: DC Rated Circuit Breaker
• Construction: Molded case insulated housing for durability and electrical safety

Voltage and Ratings

• Maximum Voltage: 600 VDC
• Interrupting Rating (1 Pole in Series): 42 kA @ 125 VDC
• Interrupting Rating (2 Poles in Series): 50 kA @ 250 VDC
• Interrupting Rating (3 Poles in Series): 42 kA @ 600 VDC
• Frequency (AC reference rating): 50/60 Hz

xProduct Data

• Manufacturer: Eaton / Cutler-Hammer
• Product Series: HKD Series
• Model Number: HKDDC3300
• Current Rating: 300A
• Number of Poles: 3
• Connection Type: Bolt-On
• Terminal Type: Standard Terminals Included
• Application: Industrial DC power distribution and protection systems

Important Note

The product image typically represents a base model for identification purposes only, and the actual configuration may vary depending on installed accessories. If accessories are ordered together with the breaker, they can be installed according to your configuration requirements at no additional cost. Simply include the required configuration details in the order comment section during checkout to ensure proper setup before shipment.

Returns are easy

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

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