THJK426225WL - 225Amp Circuit Breaker

THJK426225WL - 225Amp Circuit Breaker

The THJK426225WL is a 225-amp, 2-pole molded-case circuit breaker designed for use in your commercial and industrial electrical distribution systems that require dependable overcurrent and short-circuit protection. Part of the THJK4 Q-Line series, this breaker features a thermal-magnetic trip unit with an internal common trip and a non-interchangeable trip configuration, helping protect conductors and connected equipment from potentially damaging electrical faults. Built with a cable-in/cable-out (lug-lug) design, the unit includes both line-side and load-side lugs, simplifying installation in compatible switchgear, panelboard, and distribution applications.

Engineered for long service life, the THJK426225WL is designed to provide consistent protection while remaining compatible with existing electrical systems that use THJK4-frame circuit breakers. Its HACR rating makes it suitable for heating, air conditioning, and refrigeration applications that require code-compliant circuit protection. With interrupting capacities of 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC, this breaker is well-suited for demanding electrical environments where reliable fault interruption is essential. Built to last, it remains a practical solution for maintaining, repairing, or expanding compatible power distribution systems.

Key Features and Benefits

• 225 Amp continuous current rating
• 2-pole configuration for the protection of two energized conductors
• THJK4 frame design for compatibility with designated electrical distribution equipment
• The thermal magnetic trip unit provides both overload and short-circuit protection
• The internal common trip mechanism helps ensure the simultaneous disconnection of both poles during fault conditions
• Cable-in/cable-out (lug-lug) construction for straightforward field wiring
• Includes both line-side and load-side lugs
• HACR rated for heating, air conditioning, and refrigeration applications
• Designed for commercial and industrial power distribution systems
• Built for long-term durability and dependable operation

Technical Specifications

• Part Number: THJK426225WL
• Type: THJK4
• Circuit Breaker Style: Molded Case Circuit Breaker
• Poles: 2
• Amperage Rating: 225A
• Trip Unit: Non-Interchangeable Thermal Magnetic
• Trip Configuration: Internal Common Trip
• Connection Type: Cable-In/Cable-Out (Lug-Lug)
• Included Accessories: Line-Side and Load-Side Lugs
• HACR Rated: Yes
• Interrupting Capacity: 25kA @ 600VAC
• Interrupting Capacity: 35kA @ 480VAC
• Interrupting Capacity: 65kA @ 240VAC
• Height: 10.13 in.
• Width: 8.25 in.
• Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated for approved heating, ventilation, air conditioning, and refrigeration applications
• Manufactured for use in accordance with applicable electrical system requirements and equipment compatibility standards
• Designed for installation by qualified electrical professionals in accordance with local electrical codes and regulations

Where It Works Best

• The THJK426225WL is commonly used in commercial buildings, industrial facilities, manufacturing operations, mechanical equipment installations, HVAC systems, distribution equipment, and electrical infrastructure projects that require a 225-amp, 2-pole molded-case circuit breaker. It is particularly well-suited for maintaining or servicing existing electrical systems designed around the THJK4 platform, where proper form, fit, and functional compatibility are important considerations.