DK3300 - 300Amp Circuit Breaker
- 300 Amp
- 65k @ 240VAC
- 3 Pole
Purchase Options: New In Box
DK3300 - 300Amp Circuit Breaker Description
DK3300 - 300 Amp Circuit Breaker
If you're working with higher electrical loads and need something you can count on, the Eaton DK3300 circuit breaker is a solid choice. This 300 amp, 3-pole molded case breaker is part of Eaton’s Series C lineup, known for consistent performance in real-world conditions—not just on paper. It’s built as a complete breaker, so you’re not piecing components together, and the T186 trip unit helps ensure it reacts when it should, not before and not after. What stands out here is its balance of power and practicality. With a 65 kAIC interrupt rating at 240 VAC, it’s ready to handle serious fault conditions. At the same time, the compact frame and straightforward terminal setup make installation more manageable than you might expect for a breaker in this class. Whether you're replacing an existing unit or setting up a new system, this one fits into the job without unnecessary complications.
Key Features and Benefits
- 300 amp capacity suited for demanding commercial and industrial loads
- Three-pole design for full-phase protection
- High interrupt rating (65 kAIC at 240 VAC) for handling fault conditions
- T186 trip unit for consistent and reliable operation
- Works with both 240 VAC and 250 VDC systems
- Complete breaker design—no extra assembly needed
- Aluminum terminals for solid line and load connections
Technical Specifications
- Catalog Number: DK3300
- Manufacturer Series: Eaton Series C
- Frame Type: K Frame
- Breaker Type: Molded Case Circuit Breaker (Complete Unit)
- Amperage: 300A
- Voltage Rating: 240 VAC / 250 VDC
- Frequency: 50–60 Hz
- Poles: 3
- Trip Unit: T186
-
Interrupting Capacity:
- 65 kAIC @ 240 VAC
- 10 kAIC @ 250 VDC
- Terminal Material: Aluminum
- Dimensions: 5.5" H x 5.5" W x 4.1" D
- Weight: 11.5 lbs
Material Compliance and Certifications
- UL Listed for safety and performance
- Built to meet standard U.S. electrical compliance requirements
Where It Works Best
- You’ll typically see the DK3300 used in commercial panels, industrial equipment, and facility power systems where downtime isn’t an option. It’s a practical fit for:
- Manufacturing environments
- HVAC and mechanical systems
- Electrical distribution panels
- Maintenance replacements where specs need to match exactly
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.
Eaton®, Cutler-Hammer®, Westinghouse®, Challenger®, Bussmann®, Crouse-Hinds®, and Cooper® are registered trademarks of Eaton Corporation plc. Products sold are surplus, used, or refurbished and are NOT supplied by Eaton Corporation plc or its affiliates.
Specifications
- Width:5.5
- Height:10.13
- Depth:4.1
- Poles:3
- Amperes:300
- A.I.C. Rating & Volts:65k @ 240VAC
- Type:DK
- Approx Dimensions:5.50"W x 10.13"L x 4.10"D
- Additional Notes:40°C, HACR Rated, K-Frame, Thermal Magnetic Circuit Breaker with Non-Interchangeable Trip Unit. Includes Line and Load Lugs
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
FREE shipping on breaker orders over $100 and all other items with orders over $500.
CIRCUIT BREAKER SUPERSTORE® 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, CIRCUIT BREAKER SUPERSTORE® may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.
CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).