TJK436350 **Older Style** - 350Amp Circuit Breaker

TJK436350 **Older Style** - 350 Amp Circuit Breaker

The TJK436350 molded case circuit breaker is designed for your dependable protection in commercial and industrial electrical distribution systems that require a 350-amp, 3-pole configuration. Built as part of the Q-Line Type TJK4 series, this breaker features an older-style black face and is commonly used in existing installations where matching form, fit, and electrical ratings matter. Its thermal magnetic trip unit provides both overload and short-circuit protection, while the internal common trip mechanism helps disconnect all poles simultaneously during fault conditions. Designed with a non-interchangeable trip unit and bolt-on mounting, the TJK436350 supports secure installation in compatible panelboards and switchgear applications. Load-side lugs are included, helping simplify field connections during maintenance or replacement projects. Built to last and suited for demanding environments, this breaker remains a practical solution for keeping legacy power systems operating safely and efficiently.

Key Features and Benefits

• 350 Amp Capacity: Supports higher-capacity commercial and industrial power distribution applications.
• 3-Pole Configuration: Designed for three-phase electrical systems requiring coordinated protection across all phases.
• Thermal Magnetic Trip Unit: Helps protect circuits against overloads and short circuits with dependable response characteristics.
• Internal Common Trip: Disconnects all poles together during fault conditions for added system protection.
• Bolt-On Mounting Design: Provides a stable and secure installation in compatible equipment.
• Older Style Black Face: Useful for maintaining consistency in legacy electrical systems and existing installations.
• Includes Load-Side Lugs: Ready for installation with included connection hardware.
• HACR Rated: Suitable for use with heating, air conditioning, and refrigeration equipment applications where applicable.
• Q-Line Type TJK4: Designed for compatibility with designated Q-Line distribution equipment.
  

Technical Specifications

• Part Number: TJK436350
  
• Manufacturer Series: Q-Line
  
• Type: TJK4
  
• Product Type: Molded Case Circuit Breaker
  
• Poles: 3
  
• Amperage Rating: 350A
  
• Trip Unit: Thermal Magnetic
  
• Trip Style: Internal Common Trip
  
• Mounting Style: Bolt-On
  
• Face Style: Older Style Black Face
  
• Interrupting Rating:
  • 22kA @ 600VAC
  • 30kA @ 480VAC
  • 42kA @ 240VAC
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.
• Included: Load-Side Lugs
  
• Application: Commercial & Industrial Power Distribution
  

Material Compliance and Certifications

• HACR Rated: Suitable for use with heating, air conditioning, and refrigeration equipment applications where applicable.
• Commercial and Industrial Use: Designed and manufactured for use in applicable commercial and industrial electrical distribution systems.
• Durable Molded Case Construction: Molded case construction intended for long-term durability in demanding electrical environments.
• System Compatibility: Suitable for installations requiring compliance with applicable electrical equipment ratings and system specifications.
  

Where It Works Best

• The TJK436350 is well-suited for commercial facilities, industrial buildings, distribution panels, and large electrical systems that require a 350 amp, 3-pole breaker with bolt-on installation. It is commonly used in existing Q-Line panelboards and switchgear, manufacturing and processing facilities, HVAC and refrigeration systems, commercial power distribution equipment, maintenance and replacement projects involving legacy electrical infrastructure, and applications requiring thermal magnetic protection with internal common trip functionality. Its older style black face and matching electrical characteristics make it particularly useful where maintaining compatibility with existing equipment is important.