TJK426250 **Older Style** - 250Amp Circuit Breaker

TJK426250 **Older Style** - 250 Amp Circuit Breaker

The TJK426250 molded case circuit breaker is designed for dependable protection in your commercial and industrial electrical distribution systems that require a 250-amp, 2-pole configuration. Built as part of the trusted TJK4 series, this older-style black-face breaker features a thermal-magnetic trip unit with internal common trip functionality for consistent overcurrent and short-circuit protection. Its bolt-on mounting design supports secure installation in compatible panelboards and switchgear applications, making it a practical form, fit, and functional replacement for existing legacy electrical systems.

Engineered for demanding operating environments, the TJK426250 includes load-side lugs and carries HACR certification for heating, air conditioning, and refrigeration applications. With interrupting capacities rated up to 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC, this breaker is suited for facilities where dependable circuit protection is essential. The non-interchangeable trip unit design helps maintain consistent protection settings while reducing the risk of unauthorized trip modifications. Built to last and commonly used in commercial buildings, manufacturing facilities, and industrial power distribution systems, this circuit breaker remains a reliable solution for maintaining continuity in existing electrical infrastructure.

Key Features and Benefits

• 250-amp molded case circuit breaker: Designed for commercial and industrial power distribution applications requiring dependable protection.
• 2-pole configuration: Provides reliable protection across compatible electrical systems.
• Older style black face design: Supports proper matching in legacy equipment setups and existing installations.
• Thermal magnetic trip unit: Provides both overload and short-circuit protection for consistent operation.
• Internal common trip mechanism: Enhances coordinated breaker operation during fault conditions.
• Bolt-on mounting: Supports secure installation in designated electrical assemblies and compatible equipment.
• Includes load-side lugs: Adds installation convenience for applicable wiring configurations.
• HACR rated: Suitable for heating, air conditioning, and refrigeration applications.
• Non-interchangeable trip unit: Helps preserve factory protection settings and reduces the risk of unauthorized modifications.
• Built for demanding environments: Designed for long-term service in commercial and industrial electrical systems.
  

Technical Specifications

• Part Number: TJK426250
  
• Type: TJK4
  
• Product Category: Molded Case Circuit Breaker
  
• Poles: 2
  
• Amperage: 250A
  
• Trip Unit: Thermal Magnetic
  
• Trip Configuration: Internal Common Trip
  
• Mounting Style: Bolt-On
  
• Face Style: Older Style Black Face
  
• A.I.C. Rating:
  • 22kA @ 600VAC
  • 30kA @ 480VAC
  • 42kA @ 240VAC
• Dimensions:
  • Height: 10.13 in
  • Width: 8.25 in
  • Depth: 3.81 in
• Included Accessories: Load-Side Lugs
  
• Application Type: Q-Line
  

Material Compliance and Certifications

• HACR Rated: Suitable for heating, air conditioning, and refrigeration applications.
• UL-Compatible Design: Designed for use in compatible UL-listed electrical distribution equipment.
• Thermal Magnetic Protection: Configured for overload and short-circuit interruption in demanding electrical systems.
• Commercial and Industrial Applications: Manufactured for use in commercial and industrial electrical system environments.
  

Where It Works Best

• The TJK426250 circuit breaker is commonly used in commercial buildings, industrial facilities, distribution panels, motor control systems, and HVAC-related electrical applications where a 250 amp, 2-pole bolt-on breaker is required. It is particularly well-suited for maintaining or servicing existing legacy electrical systems that require an older-style black-face TJK4 breaker for proper compatibility and fit.