DK2400Y - 400Amp Circuit Breaker

DK2400Y - 400 Amp Circuit Breaker

The DK2400Y thermal magnetic circuit breaker is designed to deliver dependable overcurrent protection in demanding electrical distribution systems where high amperage capacity and reliable interruption ratings are essential. Built on a K-Frame platform, this 2-pole, 400-amp breaker provides consistent performance with a 65k A.I.C. interrupting rating at 240VAC, helping protect equipment and wiring from damaging overloads and short circuits. Its thermal magnetic trip mechanism combines time-delay protection for sustained overloads with instantaneous tripping for fault conditions, helping maintain system stability while reducing unnecessary downtime. Designed for operation in 40°C environments and HACR rated, the DK2400Y is well suited for commercial and industrial HVAC applications, power distribution panels, and heavy-duty electrical systems where dependable circuit protection is critical. With non-interchangeable trip functionality and included line-side lugs, installation is straightforward while ensuring consistent protection characteristics across the life of the breaker.

Key Features and Benefits

• High Interrupting Capacity: Rated 65k A.I.C. at 240VAC to help safely interrupt high fault currents.
• 400 Amp Protection: Supports large electrical loads commonly found in commercial and industrial systems.
• Thermal Magnetic Trip Mechanism: Provides precise response to both prolonged overload conditions and instantaneous short circuits.
• K-Frame Construction: Engineered for demanding power distribution applications requiring dependable breaker performance.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment circuits.
• Non-Interchangeable Trip Unit: Ensures consistent factory-calibrated protection settings.
• Line-Side Lugs Included: Simplifies installation and electrical connections.

Technical Specifications

• Part Number: DK2400Y
  
• Poles: 2
  
• Amperage Rating: 400 Amps
  
• Voltage Rating: 240 VAC
  
• Interrupting Capacity: 65k A.I.C. @ 240VAC
  
• Frame Type: DK (K-Frame)
  
• Trip Type: Thermal Magnetic, Non-Interchangeable
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Included Accessories: Line-Side Lugs
  
• Approximate Shipping Weight: 5.5 lbs
  
• Approximate Shipping Height: 10.13 inches
  

Material Compliance and Certifications

• Industry Standards: The DK2400Y circuit breaker is manufactured to meet recognized electrical industry safety and performance standards for molded case circuit breakers used in commercial and industrial power systems.
• HACR Certification: HACR certification confirms its suitability for HVAC-related electrical circuits. Proper installation should always follow applicable electrical codes and equipment guidelines to ensure safe and reliable operation.

Where It Works Best

• This 400-amp K-Frame circuit breaker is a strong fit for commercial buildings, industrial facilities, electrical distribution panels, and HVAC equipment circuits that require dependable high-capacity protection. It’s commonly used in motor control systems, large mechanical equipment, and heavy-duty power distribution environments where consistent tripping performance and high interrupting ratings are essential for maintaining electrical system safety.