DK3250Y - 250Amp Circuit Breaker

DK3250Y - 250 Amp Circuit Breaker

The DK3250Y thermal magnetic circuit breaker is engineered to deliver dependable overcurrent protection for demanding commercial and industrial electrical systems. Built on the trusted K-Frame platform, this 250-amp, 3-pole breaker combines high interrupting capacity with precise thermal-magnetic trip protection, helping safeguard equipment, wiring, and power distribution infrastructure. With a 65kA interrupting rating at 240VAC, the DK3250Y is designed to respond quickly to overloads and short circuits, minimizing potential downtime and protecting connected equipment. Its non-interchangeable trip unit ensures calibrated protection matched specifically to the breaker’s rating, while the included line-side lugs simplify installation in panelboards and distribution assemblies. Rated for operation at 40°C and HACR applications, this circuit breaker is commonly selected for HVAC systems, commercial service equipment, and industrial distribution panels where reliable protection is essential.

Key Features and Benefits

• 250 Amp Protection: Designed to handle high-capacity electrical loads in commercial and industrial environments.
• 3-Pole Configuration: Provides simultaneous protection across three phases in three-phase electrical systems.
• 65kA Interrupting Rating at 240VAC: Helps safely interrupt high fault currents, supporting system safety and equipment protection.
• Thermal Magnetic Trip Mechanism: Combines thermal overload protection with magnetic short-circuit response for dependable performance.
• K-Frame Construction: Built for compatibility with K-Frame panelboards and distribution equipment.
• Non-Interchangeable Trip Unit: Factory-matched trip calibration helps maintain consistent and predictable protection.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment applications.
• Includes Line-Side Lugs: Streamlines installation and ensures secure conductor connections.

Technical Specifications

• Part Number: DK3250Y
  
• Amperage Rating: 250 Amps
  
• Poles: 3
  
• Interrupting Capacity: 65kA @ 240VAC
  
• Frame Type: DK / K-Frame
  
• Trip Type: Thermal Magnetic
  
• Trip Unit: Non-Interchangeable
  
• Operating Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Included Accessories: Line-Side Lugs
  
• Approximate Shipping Weight: 5.5 lbs
  
• Approximate Shipping Height: 10.13 in.
  

Material Compliance and Certifications

• Industry Standards: The DK3250Y circuit breaker is manufactured to meet recognized electrical industry standards for molded-case circuit protection.
• UL and North American Electrical Safety Requirements: Units in this class are typically designed and tested to comply with UL and applicable North American electrical safety requirements, supporting installation in properly rated electrical distribution equipment. Compliance with these standards helps ensure consistent performance, electrical safety, and compatibility with commercial and industrial power systems.
  

Where It Works Best

• Commercial building power distribution panels
• Industrial control panels and equipment feeders
• HVAC and refrigeration systems (HACR applications)
• Manufacturing facilities and processing equipment
• Electrical service equipment in retail, institutional, and office environments