TJK436350WL **Older Style** - 350Amp Circuit Breaker

TJK436350WL **Older Style** - 350 Amp Circuit Breaker

The TJK436350WL molded case circuit breaker is designed for your dependable protection in commercial and industrial electrical distribution systems that require a 350-amp, 3-pole breaker with thermal-magnetic trip. Built as part of the Q-Line family, this breaker features a classic, older-style black-face configuration. It is commonly used in legacy switchgear, panelboards, and power distribution equipment where exact form, fit, and function matter. Its cable-in/cable-out lug-lug design allows for straightforward installation while maintaining compatibility with existing systems.

This breaker includes a non-interchangeable thermal magnetic trip unit with internal common trip protection, helping your safeguard electrical equipment against overloads and short circuits. With interrupting ratings of 22k @ 600VAC, 30k @ 480VAC, and 42k @ 240VAC, the TJK436350WL is suitable for a wide range of demanding electrical applications. The included line and load-side lugs help simplify field installation, and the HACR rating supports use in heating, air conditioning, and refrigeration equipment applications. Built to last and engineered for consistent operation, this molded case circuit breaker remains a practical solution for maintaining and servicing existing electrical infrastructure.

Key Features and Benefits

• 350 Amp Molded Case Circuit Breaker: Designed for commercial and industrial power distribution.
• 3-Pole Configuration: Supports multi-phase electrical systems.
• Older Style Black Face Design: Provides compatibility with existing equipment layouts.
• Thermal Magnetic Trip Unit: Provides overload and short-circuit protection.
• Internal Common Trip Mechanism: Helps disconnect all poles simultaneously during fault conditions.
• Cable-In/Cable-Out (Lug-Lug) Connection Style: Supports straightforward installation.
• Line and Load-Side Lugs Included: Helps simplify field installation.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration applications.
• Q-Line Series Configuration: Commonly used in legacy electrical systems.
• Built for Long Service Life: Engineered for demanding environments.
  

Technical Specifications

• Part Number: TJK436350WL
  
• Type: TJK4
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Poles: 3
  
• Amperage: 350A
  
• Voltage / A.I.C. Ratings: 22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
  
• Connection Type: Cable-in/Cable-out (Lug-Lug)
  
• Face Style: Older Style Black Face
  
• Line & Load Lugs: Included
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: Rated for use with heating, air conditioning, and refrigeration equipment.
• Commercial and Industrial Applications: Designed for use in commercial and industrial electrical distribution systems.
• Manufactured for Compatibility: Built for compatibility with applicable molded case circuit breaker standards and operating requirements.
• Thermal Magnetic Protection: Helps support safe operation during overload and short-circuit conditions.
  

Where It Works Best

• The TJK436350WL is well-suited for commercial buildings, industrial facilities, manufacturing environments, and large-scale electrical distribution systems using legacy Q-Line equipment. It is commonly installed in switchboards, panelboards, motor control applications, and HVAC-related systems where maintaining original equipment compatibility is important. Its lug-lug configuration and older style black face design make it a practical replacement option for existing installations requiring matching specifications and footprint compatibility.