DK3250 - 250Amp Circuit Breaker

DK3250 - 250 Amp Circuit Breaker

The DK3250 thermal magnetic circuit breaker is designed to provide dependable overcurrent and short-circuit protection for commercial and industrial electrical distribution systems. Built on a K-Frame platform, this 250-amp, 3-pole circuit breaker combines high interrupting capacity with reliable thermal-magnetic trip performance to safeguard equipment and maintain system stability. With a 65kA interrupting rating at 240VAC, the DK3250 is well suited for demanding electrical environments where high fault current protection is required. Its non-interchangeable trip unit ensures consistent protection settings, while the included line and load lugs simplify installation in panelboards, switchboards, and distribution assemblies. HACR rated and calibrated for 40°C operating environments, this breaker offers dependable protection for HVAC systems, motor loads, and power distribution circuits that demand steady performance.

Key Features and Benefits

• 250 Amp Continuous Rating – Designed to handle substantial electrical loads in commercial and industrial systems.
• 3-Pole Configuration – Provides simultaneous protection across three phases for balanced power distribution.
• 65kA Interrupting Capacity at 240VAC – Helps protect equipment during high fault current events.
• Thermal Magnetic Trip Mechanism – Combines long-time thermal protection with instantaneous magnetic response for short circuits.
• Non-Interchangeable Trip Unit – Maintains fixed trip characteristics for reliable and consistent circuit protection.
• K-Frame Construction – Engineered for dependable operation in demanding electrical environments.
• HACR Rated – Suitable for heating, air conditioning, and refrigeration equipment applications.
• Line and Load Lugs Included – Supports efficient installation and secure conductor termination.
• 40°C Calibration – Designed to operate accurately in standard industrial ambient temperatures.

Technical Specifications

• Part Number: DK3250
• Amperage Rating: 250A
• Number of Poles: 3
• Interrupting Rating: 65kA @ 240VAC
• Frame Type: DK (K-Frame)
• Trip Unit Type: Thermal Magnetic, Non-Interchangeable
• HACR Rated: Yes
• Calibration Temperature: 40°C
• Included Accessories: Line and Load Lugs
• Approximate Shipping Weight: 5.5 lbs
• Approximate Height: 10.13 inches

Material Compliance and Certifications

• Safety and Performance Standards: The DK3250 circuit breaker is manufactured to meet widely recognized electrical safety and performance standards used across commercial and industrial power distribution systems.
• HACR Certification: HACR certification confirms compatibility with heating, air conditioning, and refrigeration equipment applications.
• Installation Compliance: The design and materials are intended to support safe operation when installed according to applicable electrical codes and manufacturer guidelines.

Where It Works Best

• The DK3250 3-pole 250A circuit breaker is commonly used in commercial buildings, industrial facilities, distribution panels, and HVAC power systems that require dependable overcurrent protection. Its high interrupting rating makes it a practical choice for installations where fault current levels may be elevated. You’ll often find breakers in this class protecting motor loads, feeder circuits, mechanical equipment, and main distribution panels, helping maintain electrical system safety and operational continuity.